├── .jshintrc
├── README.md
├── attraction-conditional
    ├── demo.js
    └── index.html
├── attraction-drag
    ├── demo.js
    └── index.html
├── attraction-two-targets
    ├── demo.js
    └── index.html
├── attraction
    ├── demo.js
    └── index.html
├── basics
    ├── demo.js
    └── index.html
├── drag
    ├── demo.js
    └── index.html
├── flickity
    ├── demo.css
    ├── flickity.css
    ├── flickity.pkgd.js
    └── index.html
├── gravity-well
    ├── demo.js
    └── index.html
├── live-basics
    ├── demo.js
    └── index.html
├── live-bounds
    ├── demo.js
    └── index.html
├── live-drag
    ├── demo.js
    └── index.html
├── photo-scroller
    ├── demo.js
    ├── index.html
    └── van.jpg
├── resting-position
    ├── demo.js
    └── index.html
├── rubber-band-bounds
    ├── demo.js
    └── index.html
├── step-graphs
    ├── graph-bg.png
    ├── index.html
    └── step-graphs.js
└── wind
    ├── demo.js
    └── index.html


/.jshintrc:
--------------------------------------------------------------------------------
1 | {
2 |   "browser": true,
3 |   "undef": true,
4 |   "unused": true
5 | }
6 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Practical UI physics
 2 | 
 3 | Demos for my talk _Practical UI physics_.
 4 | 
 5 | + [Watch the video on YouTube](https://www.youtube.com/watch?v=90oMnMFozEE)
 6 | + [Slides on Speakerdeck](https://speakerdeck.com/desandro/practical-ui-physics)
 7 | 
 8 | Adding physics-based motion to UI can make digital interactions feel natural, comfortable, and delightful. So why is it so hard to get right, especially on the web? While mobile device SDK's have physics-based libraries built-in, web developers are missing a straight-forward way to add physics to their sites. This talk aims to solve that. Physics is a huge subject, and physics programming is often intimidating. But for UI developers, we need only to take advantage of its core principles in a practical model. This talk will cover the fundamentals of physics programming, how to develop your own physics model in JavaScript, and how to use that model to make UI feel natural.
 9 | 
10 | Demos also available on CodePen — [Practial UI physics collection](http://codepen.io/collection/XgYvmv/)
11 | 
12 | + [basic](http://codepen.io/desandro/pen/WvWGej)
13 | + [step graphs](http://codepen.io/desandro/pen/zGXKYm)
14 | + [drag](http://codepen.io/desandro/pen/zGXKOJ)
15 | + [attraction](http://codepen.io/desandro/pen/XbQjbP)
16 | + [attraction drag](http://codepen.io/desandro/pen/oXOzXr)
17 | + [attraction conditional](http://codepen.io/desandro/pen/BNELoQ)
18 | + [attraction two targets](http://codepen.io/desandro/pen/VLNKew)
19 | + [gravity well](http://codepen.io/desandro/pen/jPRMWa)
20 | + [wind](http://codepen.io/desandro/pen/doLpMb)
21 | + [resting position](http://codepen.io/desandro/pen/yNraOK)
22 | + [rubber band bounds](http://codepen.io/desandro/pen/QbPKEq)
23 | + [photo scroller](http://codepen.io/desandro/pen/VLNKKY)
24 | 
25 | Demo use mouse events to keep code simple, even though I recommend using physics for touch-based devices. Yes, I realize the irony.
26 | 
27 | ## Additional resources
28 | 
29 | + [Nature of Code](http://natureofcode.com/) by Daniel Shiffman, Chapters 1 & 2
30 | + [Coding Math videos on YouTube](https://www.youtube.com/user/codingmath/) by Keith Peters
31 | 


--------------------------------------------------------------------------------
/attraction-conditional/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 400;
11 | var velocityX = 0;
12 | var friction = 0.9;
13 | var isDragging = false;
14 | var dragPositionX = positionX;
15 | var target = 400;
16 | var targetBound = 150;
17 | var attractionStrength = 0.01;
18 | 
19 | function animate() {
20 |   update();
21 |   render();
22 |   requestAnimationFrame( animate );
23 | }
24 | 
25 | animate();
26 | 
27 | function update() {
28 |   // attraction
29 |   var distance = target - positionX;
30 |   // attract if within bounds
31 |   var attraction = Math.abs( distance ) <= targetBound ?
32 |     distance * attractionStrength : 0;
33 |   applyForce( attraction );
34 |   // drag
35 |   applyDragForce();
36 |   // integrate physics
37 |   velocityX *= friction;
38 |   positionX += velocityX;
39 | }
40 | 
41 | function applyForce( force ) {
42 |   velocityX += force;
43 | }
44 | 
45 | function applyDragForce() {
46 |   if ( !isDragging ) {
47 |     return;
48 |   }
49 |   var dragVelocity = dragPositionX - positionX;
50 |   var dragForce = dragVelocity - velocityX;
51 |   applyForce( dragForce );
52 | }
53 | 
54 | function render() {
55 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
56 |   // render target
57 |   ctx.fillStyle = 'hsla(210, 100%, 50%, 0.5)';
58 |   circle( target, 200, targetBound, 'fill' );
59 |   // render particle
60 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
61 |   circle( positionX, 200, 25, 'fill' );
62 | }
63 | 
64 | function circle( x, y, radius, render ) {
65 |   ctx.beginPath();
66 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
67 |   ctx[ render ]();
68 |   ctx.closePath();
69 | }
70 | 
71 | // ----- mouse events ----- //
72 | 
73 | var mousedownX;
74 | var dragStartPositionX;
75 | 
76 | document.addEventListener( 'mousedown', function( event ) {
77 |   isDragging = true;
78 |   mousedownX = event.pageX;
79 |   dragStartPositionX = positionX;
80 |   setDragPosition( event );
81 |   window.addEventListener( 'mousemove', setDragPosition );
82 |   window.addEventListener( 'mouseup', onMouseup );
83 | });
84 | 
85 | function setDragPosition( event ) {
86 |   var moveX = event.pageX - mousedownX;
87 |   dragPositionX = dragStartPositionX + moveX;
88 |   event.preventDefault();
89 | }
90 | 
91 | function onMouseup() {
92 |   isDragging = false;
93 |   window.removeEventListener( 'mousemove', setDragPosition );
94 |   window.removeEventListener( 'mouseup', onMouseup );
95 | }
96 | 


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/attraction-conditional/index.html:
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 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>attraction - conditional</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>attraction - conditional</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/attraction-drag/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 400;
11 | var velocityX = 0;
12 | var friction = 0.9;
13 | var isDragging = false;
14 | var dragPositionX = positionX;
15 | var target = 400;
16 | var attractionStrength = 0.01;
17 | 
18 | function animate() {
19 |   update();
20 |   render();
21 |   requestAnimationFrame( animate );
22 | }
23 | 
24 | animate();
25 | 
26 | function update() {
27 |   // attraction
28 |   var distance = target - positionX;
29 |   var attraction = distance * attractionStrength;
30 |   applyForce( attraction );
31 |   // drag
32 |   applyDragForce();
33 |   // integrate physics
34 |   velocityX *= friction;
35 |   positionX += velocityX;
36 | }
37 | 
38 | function applyForce( force ) {
39 |   velocityX += force;
40 | }
41 | 
42 | function applyDragForce() {
43 |   if ( !isDragging ) {
44 |     return;
45 |   }
46 |   var dragVelocity = dragPositionX - positionX;
47 |   var dragForce = dragVelocity - velocityX;
48 |   applyForce( dragForce );
49 | }
50 | 
51 | function render() {
52 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
53 |   // render target
54 |   ctx.fillStyle = 'hsla(210, 100%, 50%, 0.7)';
55 |   circle( target, 100, 15, 'fill' );
56 |   // render particle
57 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
58 |   circle( positionX, 100, 25, 'fill' );
59 | }
60 | 
61 | function circle( x, y, radius, render ) {
62 |   ctx.beginPath();
63 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
64 |   ctx[ render ]();
65 |   ctx.closePath();
66 | }
67 | 
68 | // ----- mouse events ----- //
69 | 
70 | var mousedownX;
71 | var dragStartPositionX;
72 | 
73 | document.addEventListener( 'mousedown', function( event ) {
74 |   isDragging = true;
75 |   mousedownX = event.pageX;
76 |   dragStartPositionX = positionX;
77 |   setDragPosition( event );
78 |   window.addEventListener( 'mousemove', setDragPosition );
79 |   window.addEventListener( 'mouseup', onMouseup );
80 | });
81 | 
82 | function setDragPosition( event ) {
83 |   var moveX = event.pageX - mousedownX;
84 |   dragPositionX = dragStartPositionX + moveX;
85 |   event.preventDefault();
86 | }
87 | 
88 | function onMouseup() {
89 |   isDragging = false;
90 |   window.removeEventListener( 'mousemove', setDragPosition );
91 |   window.removeEventListener( 'mouseup', onMouseup );
92 | }
93 | 


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/attraction-drag/index.html:
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 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>attraction - drag</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>attraction - drag</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/attraction-two-targets/demo.js:
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  1 | // canvas
  2 | var canvas = document.querySelector('canvas');
  3 | var ctx = canvas.getContext('2d');
  4 | 
  5 | // get/set canvas size
  6 | var canvasWidth = canvas.width = window.innerWidth - 20;
  7 | var canvasHeight = canvas.height;
  8 | 
  9 | // particle properties
 10 | var positionX = 200;
 11 | var velocityX = 0;
 12 | var friction = 0.9;
 13 | var isDragging = false;
 14 | var dragPositionX = positionX;
 15 | var targetA = positionX;
 16 | var targetB = 700;
 17 | var targetBound = 150;
 18 | var attractionStrength = 0.01;
 19 | 
 20 | function animate() {
 21 |   update();
 22 |   render();
 23 |   requestAnimationFrame( animate );
 24 | }
 25 | 
 26 | animate();
 27 | 
 28 | function update() {
 29 |   attract( targetA );
 30 |   attract( targetB );
 31 |   // drag
 32 |   applyDragForce();
 33 |   // integrate physics
 34 |   velocityX *= friction;
 35 |   positionX += velocityX;
 36 | }
 37 | 
 38 | function attract( target ) {
 39 |   // attraction
 40 |   var distance = target - positionX;
 41 |   // attract if within bounds
 42 |   var attraction = Math.abs( distance ) <= targetBound ?
 43 |     distance * attractionStrength : 0;
 44 |   applyForce( attraction );
 45 | }
 46 | 
 47 | function applyForce( force ) {
 48 |   velocityX += force;
 49 | }
 50 | 
 51 | function applyDragForce() {
 52 |   if ( !isDragging ) {
 53 |     return;
 54 |   }
 55 |   var dragVelocity = dragPositionX - positionX;
 56 |   var dragForce = dragVelocity - velocityX;
 57 |   applyForce( dragForce );
 58 | }
 59 | 
 60 | function render() {
 61 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
 62 |   // render target
 63 |   ctx.fillStyle = 'hsla(210, 100%, 50%, 0.5)';
 64 |   circle( targetA, 200, targetBound, 'fill' );
 65 |   circle( targetB, 200, targetBound, 'fill' );
 66 |   // render particle
 67 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
 68 |   circle( positionX, 200, 25, 'fill' );
 69 | }
 70 | 
 71 | function circle( x, y, radius, render ) {
 72 |   ctx.beginPath();
 73 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
 74 |   ctx[ render ]();
 75 |   ctx.closePath();
 76 | }
 77 | 
 78 | // ----- mouse events ----- //
 79 | 
 80 | var mousedownX;
 81 | var dragStartPositionX;
 82 | 
 83 | document.addEventListener( 'mousedown', function( event ) {
 84 |   isDragging = true;
 85 |   mousedownX = event.pageX;
 86 |   dragStartPositionX = positionX;
 87 |   setDragPosition( event );
 88 |   window.addEventListener( 'mousemove', setDragPosition );
 89 |   window.addEventListener( 'mouseup', onMouseup );
 90 | });
 91 | 
 92 | function setDragPosition( event ) {
 93 |   var moveX = event.pageX - mousedownX;
 94 |   dragPositionX = dragStartPositionX + moveX;
 95 |   event.preventDefault();
 96 | }
 97 | 
 98 | function onMouseup() {
 99 |   isDragging = false;
100 |   window.removeEventListener( 'mousemove', setDragPosition );
101 |   window.removeEventListener( 'mouseup', onMouseup );
102 | }
103 | 


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/attraction-two-targets/index.html:
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 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>attraction - two targets</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>attraction - two targets</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/attraction/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.9;
13 | var target = 100;
14 | var attractionStrength = 0.01;
15 | 
16 | function animate() {
17 |   update();
18 |   render();
19 |   requestAnimationFrame( animate );
20 | }
21 | 
22 | animate();
23 | 
24 | function update() {
25 |   // attract particle to target
26 |   var distance = target - positionX;
27 |   var attraction = distance * attractionStrength;
28 |   applyForce( attraction );
29 |   // integrate physics variables
30 |   velocityX *= friction;
31 |   positionX += velocityX;
32 | }
33 | 
34 | function applyForce( force ) {
35 |   velocityX += force;
36 | }
37 | 
38 | function render() {
39 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
40 |   // render target
41 |   ctx.fillStyle = 'hsla(210, 100%, 50%, 0.7)';
42 |   circle( target, 100, 15 );
43 |   // render particle
44 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
45 |   circle( positionX, 100, 25 );
46 | }
47 | 
48 | function circle( x, y, radius ) {
49 |   ctx.beginPath();
50 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
51 |   ctx.fill();
52 |   ctx.closePath();
53 | }
54 | 
55 | document.addEventListener( 'click', function( event) {
56 |   target = event.pageX;
57 | });
58 | 


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/attraction/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>attraction</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>attraction</h1>
20 | 
21 | <p>Click to change <code>target</code>. Change <code>attractionStrength</code> and <code>friction</code></p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/basics/demo.js:
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 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | 
14 | function update() {
15 |   // integrate physics
16 |   velocityX *= friction;
17 |   positionX += velocityX;
18 | }
19 | 
20 | function animate() {
21 |   update();
22 |   render();
23 |   requestAnimationFrame( animate );
24 | }
25 | 
26 | animate();
27 | 
28 | function render() {
29 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
30 |   // render particle
31 |   ctx.fillStyle = 'red';
32 |   circle( positionX, 100, 25 );
33 | }
34 | 
35 | function circle( x, y, radius ) {
36 |   ctx.beginPath();
37 |   ctx.arc( positionX, 100, radius, 0, Math.PI * 2 );
38 |   ctx.fill();
39 |   ctx.closePath();
40 | }
41 | 


--------------------------------------------------------------------------------
/basics/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>basics</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>basics</h1>
20 | 
21 | <canvas width="800" height="400"></canvas>
22 | 
23 | <script src="demo.js"></script>
24 | 
25 | </body>
26 | </html>
27 | 


--------------------------------------------------------------------------------
/drag/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | var isDragging = false;
14 | var dragPositionX = positionX;
15 | 
16 | function animate() {
17 |   update();
18 |   render();
19 |   requestAnimationFrame( animate );
20 | }
21 | 
22 | animate();
23 | 
24 | function update() {
25 |   applyDragForce();
26 |   velocityX *= friction;
27 |   positionX += velocityX;
28 | }
29 | 
30 | function applyForce( force ) {
31 |   velocityX += force;
32 | }
33 | 
34 | function applyDragForce() {
35 |   if ( !isDragging ) {
36 |     return;
37 |   }
38 |   var dragVelocity = dragPositionX - positionX;
39 |   var dragForce = dragVelocity - velocityX;
40 |   applyForce( dragForce );
41 | }
42 | 
43 | function render() {
44 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
45 |   // render particle
46 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
47 |   circle( positionX, 100, 25, 'fill' );
48 | }
49 | 
50 | function circle( x, y, radius, render ) {
51 |   ctx.beginPath();
52 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
53 |   ctx[ render ]();
54 |   ctx.closePath();
55 | }
56 | 
57 | // ----- mouse events ----- //
58 | 
59 | var mousedownX;
60 | var dragStartPositionX;
61 | 
62 | document.addEventListener( 'mousedown', function( event ) {
63 |   isDragging = true;
64 |   mousedownX = event.pageX;
65 |   dragStartPositionX = positionX;
66 |   setDragPosition( event );
67 |   window.addEventListener( 'mousemove', setDragPosition );
68 |   window.addEventListener( 'mouseup', onMouseup );
69 | });
70 | 
71 | function setDragPosition( event ) {
72 |   var moveX = event.pageX - mousedownX;
73 |   dragPositionX = dragStartPositionX + moveX;
74 |   event.preventDefault();
75 | }
76 | 
77 | function onMouseup() {
78 |   isDragging = false;
79 |   window.removeEventListener( 'mousemove', setDragPosition );
80 |   window.removeEventListener( 'mouseup', onMouseup );
81 | }
82 | 


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/drag/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>drag</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>drag</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


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/flickity/demo.css:
--------------------------------------------------------------------------------
 1 | * {
 2 |   -webkit-box-sizing: border-box;
 3 |   box-sizing: border-box;
 4 | }
 5 | 
 6 | body { font-family: sans-serif; }
 7 | 
 8 | .gallery {
 9 |   background: #EEE;
10 |   margin-bottom: 100px;
11 | }
12 | 
13 | .gallery-cell {
14 |   width: 66%;
15 |   height: 400px;
16 |   margin-right: 10px;
17 |   background: #8C8;
18 |   border-radius: 10px;
19 |   counter-increment: gallery-cell;
20 | }
21 | 
22 | /* cell number */
23 | .gallery-cell:before {
24 |   display: block;
25 |   text-align: center;
26 |   content: counter(gallery-cell);
27 |   line-height: 400px;
28 |   font-size: 100px;
29 |   color: white;
30 | }
31 | 
32 | .gallery-cell:nth-child(4n+0) { background: #F90; }
33 | .gallery-cell:nth-child(4n+1) { background: #8C8; }
34 | .gallery-cell:nth-child(4n+2) { background: #F09; }
35 | .gallery-cell:nth-child(4n+3) { background: #09F; }
36 | 
37 | .gallery--variable-sizes .gallery-cell:nth-child(4n+1) { width: 25%; }
38 | .gallery--variable-sizes .gallery-cell:nth-child(4n+2) { width: 90%; }
39 | .gallery--variable-sizes .gallery-cell:nth-child(4n+3) { width: 33%; }
40 | 
41 | 


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/flickity/flickity.css:
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  1 | /*! Flickity v1.1.0
  2 | http://flickity.metafizzy.co
  3 | ---------------------------------------------- */
  4 | 
  5 | .flickity-enabled {
  6 |   position: relative;
  7 | }
  8 | 
  9 | .flickity-enabled:focus { outline: none; }
 10 | 
 11 | .flickity-viewport {
 12 |   overflow: hidden;
 13 |   position: relative;
 14 |   height: 100%;
 15 | }
 16 | 
 17 | .flickity-slider {
 18 |   position: absolute;
 19 |   width: 100%;
 20 |   height: 100%;
 21 | }
 22 | 
 23 | /* draggable */
 24 | 
 25 | .flickity-enabled.is-draggable {
 26 |   -webkit-tap-highlight-color: transparent;
 27 |           tap-highlight-color: transparent;
 28 |   -webkit-user-select: none;
 29 |      -moz-user-select: none;
 30 |       -ms-user-select: none;
 31 |           user-select: none;
 32 | }
 33 | 
 34 | .flickity-enabled.is-draggable .flickity-viewport {
 35 |   cursor: move;
 36 |   cursor: -webkit-grab;
 37 |   cursor: grab;
 38 | }
 39 | 
 40 | .flickity-enabled.is-draggable .flickity-viewport.is-pointer-down {
 41 |   cursor: -webkit-grabbing;
 42 |   cursor: grabbing;
 43 | }
 44 | 
 45 | /* ---- previous/next buttons ---- */
 46 | 
 47 | .flickity-prev-next-button {
 48 |   position: absolute;
 49 |   top: 50%;
 50 |   width: 44px;
 51 |   height: 44px;
 52 |   border: none;
 53 |   border-radius: 50%;
 54 |   background: white;
 55 |   background: hsla(0, 0%, 100%, 0.75);
 56 |   cursor: pointer;
 57 |   /* vertically center */
 58 |   -webkit-transform: translateY(-50%);
 59 |       -ms-transform: translateY(-50%);
 60 |           transform: translateY(-50%);
 61 | }
 62 | 
 63 | .flickity-prev-next-button:hover { background: white; }
 64 | 
 65 | .flickity-prev-next-button:focus {
 66 |   outline: none;
 67 |   box-shadow: 0 0 0 5px #09F;
 68 | }
 69 | 
 70 | .flickity-prev-next-button:active {
 71 |   filter: alpha(opacity=60); /* IE8 */
 72 |   opacity: 0.6;
 73 | }
 74 | 
 75 | .flickity-prev-next-button.previous { left: 10px; }
 76 | .flickity-prev-next-button.next { right: 10px; }
 77 | /* right to left */
 78 | .flickity-rtl .flickity-prev-next-button.previous {
 79 |   left: auto;
 80 |   right: 10px;
 81 | }
 82 | .flickity-rtl .flickity-prev-next-button.next {
 83 |   right: auto;
 84 |   left: 10px;
 85 | }
 86 | 
 87 | .flickity-prev-next-button:disabled {
 88 |   filter: alpha(opacity=30); /* IE8 */
 89 |   opacity: 0.3;
 90 |   cursor: auto;
 91 | }
 92 | 
 93 | .flickity-prev-next-button svg {
 94 |   position: absolute;
 95 |   left: 20%;
 96 |   top: 20%;
 97 |   width: 60%;
 98 |   height: 60%;
 99 | }
100 | 
101 | .flickity-prev-next-button .arrow {
102 |   fill: #333;
103 | }
104 | 
105 | /* color & size if no SVG - IE8 and Android 2.3 */
106 | .flickity-prev-next-button.no-svg {
107 |   color: #333;
108 |   font-size: 26px;
109 | }
110 | 
111 | /* ---- page dots ---- */
112 | 
113 | .flickity-page-dots {
114 |   position: absolute;
115 |   width: 100%;
116 |   bottom: -25px;
117 |   padding: 0;
118 |   margin: 0;
119 |   list-style: none;
120 |   text-align: center;
121 |   line-height: 1;
122 | }
123 | 
124 | .flickity-rtl .flickity-page-dots { direction: rtl; }
125 | 
126 | .flickity-page-dots .dot {
127 |   display: inline-block;
128 |   width: 10px;
129 |   height: 10px;
130 |   margin: 0 8px;
131 |   background: #333;
132 |   border-radius: 50%;
133 |   filter: alpha(opacity=25); /* IE8 */
134 |   opacity: 0.25;
135 |   cursor: pointer;
136 | }
137 | 
138 | .flickity-page-dots .dot.is-selected {
139 |   filter: alpha(opacity=100); /* IE8 */
140 |   opacity: 1;
141 | }
142 | 


--------------------------------------------------------------------------------
/flickity/flickity.pkgd.js:
--------------------------------------------------------------------------------
   1 | /*!
   2 |  * Flickity PACKAGED v1.0.2
   3 |  * Touch, responsive, flickable galleries
   4 |  *
   5 |  * Licensed GPLv3 for open source use
   6 |  * or Flickity Commercial License for commercial use
   7 |  *
   8 |  * http://flickity.metafizzy.co
   9 |  * Copyright 2015 Metafizzy
  10 |  */
  11 | 
  12 | /**
  13 |  * Bridget makes jQuery widgets
  14 |  * v1.1.0
  15 |  * MIT license
  16 |  */
  17 | 
  18 | ( function( window ) {
  19 | 
  20 | 
  21 | 
  22 | // -------------------------- utils -------------------------- //
  23 | 
  24 | var slice = Array.prototype.slice;
  25 | 
  26 | function noop() {}
  27 | 
  28 | // -------------------------- definition -------------------------- //
  29 | 
  30 | function defineBridget( $ ) {
  31 | 
  32 | // bail if no jQuery
  33 | if ( !$ ) {
  34 |   return;
  35 | }
  36 | 
  37 | // -------------------------- addOptionMethod -------------------------- //
  38 | 
  39 | /**
  40 |  * adds option method -> $().plugin('option', {...})
  41 |  * @param {Function} PluginClass - constructor class
  42 |  */
  43 | function addOptionMethod( PluginClass ) {
  44 |   // don't overwrite original option method
  45 |   if ( PluginClass.prototype.option ) {
  46 |     return;
  47 |   }
  48 | 
  49 |   // option setter
  50 |   PluginClass.prototype.option = function( opts ) {
  51 |     // bail out if not an object
  52 |     if ( !$.isPlainObject( opts ) ){
  53 |       return;
  54 |     }
  55 |     this.options = $.extend( true, this.options, opts );
  56 |   };
  57 | }
  58 | 
  59 | // -------------------------- plugin bridge -------------------------- //
  60 | 
  61 | // helper function for logging errors
  62 | // $.error breaks jQuery chaining
  63 | var logError = typeof console === 'undefined' ? noop :
  64 |   function( message ) {
  65 |     console.error( message );
  66 |   };
  67 | 
  68 | /**
  69 |  * jQuery plugin bridge, access methods like $elem.plugin('method')
  70 |  * @param {String} namespace - plugin name
  71 |  * @param {Function} PluginClass - constructor class
  72 |  */
  73 | function bridge( namespace, PluginClass ) {
  74 |   // add to jQuery fn namespace
  75 |   $.fn[ namespace ] = function( options ) {
  76 |     if ( typeof options === 'string' ) {
  77 |       // call plugin method when first argument is a string
  78 |       // get arguments for method
  79 |       var args = slice.call( arguments, 1 );
  80 | 
  81 |       for ( var i=0, len = this.length; i < len; i++ ) {
  82 |         var elem = this[i];
  83 |         var instance = $.data( elem, namespace );
  84 |         if ( !instance ) {
  85 |           logError( "cannot call methods on " + namespace + " prior to initialization; " +
  86 |             "attempted to call '" + options + "'" );
  87 |           continue;
  88 |         }
  89 |         if ( !$.isFunction( instance[options] ) || options.charAt(0) === '_' ) {
  90 |           logError( "no such method '" + options + "' for " + namespace + " instance" );
  91 |           continue;
  92 |         }
  93 | 
  94 |         // trigger method with arguments
  95 |         var returnValue = instance[ options ].apply( instance, args );
  96 | 
  97 |         // break look and return first value if provided
  98 |         if ( returnValue !== undefined ) {
  99 |           return returnValue;
 100 |         }
 101 |       }
 102 |       // return this if no return value
 103 |       return this;
 104 |     } else {
 105 |       return this.each( function() {
 106 |         var instance = $.data( this, namespace );
 107 |         if ( instance ) {
 108 |           // apply options & init
 109 |           instance.option( options );
 110 |           instance._init();
 111 |         } else {
 112 |           // initialize new instance
 113 |           instance = new PluginClass( this, options );
 114 |           $.data( this, namespace, instance );
 115 |         }
 116 |       });
 117 |     }
 118 |   };
 119 | 
 120 | }
 121 | 
 122 | // -------------------------- bridget -------------------------- //
 123 | 
 124 | /**
 125 |  * converts a Prototypical class into a proper jQuery plugin
 126 |  *   the class must have a ._init method
 127 |  * @param {String} namespace - plugin name, used in $().pluginName
 128 |  * @param {Function} PluginClass - constructor class
 129 |  */
 130 | $.bridget = function( namespace, PluginClass ) {
 131 |   addOptionMethod( PluginClass );
 132 |   bridge( namespace, PluginClass );
 133 | };
 134 | 
 135 | return $.bridget;
 136 | 
 137 | }
 138 | 
 139 | // transport
 140 | if ( typeof define === 'function' && define.amd ) {
 141 |   // AMD
 142 |   define( 'jquery-bridget/jquery.bridget',[ 'jquery' ], defineBridget );
 143 | } else if ( typeof exports === 'object' ) {
 144 |   defineBridget( require('jquery') );
 145 | } else {
 146 |   // get jquery from browser global
 147 |   defineBridget( window.jQuery );
 148 | }
 149 | 
 150 | })( window );
 151 | 
 152 | /*!
 153 |  * classie v1.0.1
 154 |  * class helper functions
 155 |  * from bonzo https://github.com/ded/bonzo
 156 |  * MIT license
 157 |  * 
 158 |  * classie.has( elem, 'my-class' ) -> true/false
 159 |  * classie.add( elem, 'my-new-class' )
 160 |  * classie.remove( elem, 'my-unwanted-class' )
 161 |  * classie.toggle( elem, 'my-class' )
 162 |  */
 163 | 
 164 | /*jshint browser: true, strict: true, undef: true, unused: true */
 165 | /*global define: false, module: false */
 166 | 
 167 | ( function( window ) {
 168 | 
 169 | 
 170 | 
 171 | // class helper functions from bonzo https://github.com/ded/bonzo
 172 | 
 173 | function classReg( className ) {
 174 |   return new RegExp("(^|\\s+)" + className + "(\\s+|$)");
 175 | }
 176 | 
 177 | // classList support for class management
 178 | // altho to be fair, the api sucks because it won't accept multiple classes at once
 179 | var hasClass, addClass, removeClass;
 180 | 
 181 | if ( 'classList' in document.documentElement ) {
 182 |   hasClass = function( elem, c ) {
 183 |     return elem.classList.contains( c );
 184 |   };
 185 |   addClass = function( elem, c ) {
 186 |     elem.classList.add( c );
 187 |   };
 188 |   removeClass = function( elem, c ) {
 189 |     elem.classList.remove( c );
 190 |   };
 191 | }
 192 | else {
 193 |   hasClass = function( elem, c ) {
 194 |     return classReg( c ).test( elem.className );
 195 |   };
 196 |   addClass = function( elem, c ) {
 197 |     if ( !hasClass( elem, c ) ) {
 198 |       elem.className = elem.className + ' ' + c;
 199 |     }
 200 |   };
 201 |   removeClass = function( elem, c ) {
 202 |     elem.className = elem.className.replace( classReg( c ), ' ' );
 203 |   };
 204 | }
 205 | 
 206 | function toggleClass( elem, c ) {
 207 |   var fn = hasClass( elem, c ) ? removeClass : addClass;
 208 |   fn( elem, c );
 209 | }
 210 | 
 211 | var classie = {
 212 |   // full names
 213 |   hasClass: hasClass,
 214 |   addClass: addClass,
 215 |   removeClass: removeClass,
 216 |   toggleClass: toggleClass,
 217 |   // short names
 218 |   has: hasClass,
 219 |   add: addClass,
 220 |   remove: removeClass,
 221 |   toggle: toggleClass
 222 | };
 223 | 
 224 | // transport
 225 | if ( typeof define === 'function' && define.amd ) {
 226 |   // AMD
 227 |   define( 'classie/classie',classie );
 228 | } else if ( typeof exports === 'object' ) {
 229 |   // CommonJS
 230 |   module.exports = classie;
 231 | } else {
 232 |   // browser global
 233 |   window.classie = classie;
 234 | }
 235 | 
 236 | })( window );
 237 | 
 238 | /*!
 239 |  * EventEmitter v4.2.11 - git.io/ee
 240 |  * Unlicense - http://unlicense.org/
 241 |  * Oliver Caldwell - http://oli.me.uk/
 242 |  * @preserve
 243 |  */
 244 | 
 245 | ;(function () {
 246 |     
 247 | 
 248 |     /**
 249 |      * Class for managing events.
 250 |      * Can be extended to provide event functionality in other classes.
 251 |      *
 252 |      * @class EventEmitter Manages event registering and emitting.
 253 |      */
 254 |     function EventEmitter() {}
 255 | 
 256 |     // Shortcuts to improve speed and size
 257 |     var proto = EventEmitter.prototype;
 258 |     var exports = this;
 259 |     var originalGlobalValue = exports.EventEmitter;
 260 | 
 261 |     /**
 262 |      * Finds the index of the listener for the event in its storage array.
 263 |      *
 264 |      * @param {Function[]} listeners Array of listeners to search through.
 265 |      * @param {Function} listener Method to look for.
 266 |      * @return {Number} Index of the specified listener, -1 if not found
 267 |      * @api private
 268 |      */
 269 |     function indexOfListener(listeners, listener) {
 270 |         var i = listeners.length;
 271 |         while (i--) {
 272 |             if (listeners[i].listener === listener) {
 273 |                 return i;
 274 |             }
 275 |         }
 276 | 
 277 |         return -1;
 278 |     }
 279 | 
 280 |     /**
 281 |      * Alias a method while keeping the context correct, to allow for overwriting of target method.
 282 |      *
 283 |      * @param {String} name The name of the target method.
 284 |      * @return {Function} The aliased method
 285 |      * @api private
 286 |      */
 287 |     function alias(name) {
 288 |         return function aliasClosure() {
 289 |             return this[name].apply(this, arguments);
 290 |         };
 291 |     }
 292 | 
 293 |     /**
 294 |      * Returns the listener array for the specified event.
 295 |      * Will initialise the event object and listener arrays if required.
 296 |      * Will return an object if you use a regex search. The object contains keys for each matched event. So /ba[rz]/ might return an object containing bar and baz. But only if you have either defined them with defineEvent or added some listeners to them.
 297 |      * Each property in the object response is an array of listener functions.
 298 |      *
 299 |      * @param {String|RegExp} evt Name of the event to return the listeners from.
 300 |      * @return {Function[]|Object} All listener functions for the event.
 301 |      */
 302 |     proto.getListeners = function getListeners(evt) {
 303 |         var events = this._getEvents();
 304 |         var response;
 305 |         var key;
 306 | 
 307 |         // Return a concatenated array of all matching events if
 308 |         // the selector is a regular expression.
 309 |         if (evt instanceof RegExp) {
 310 |             response = {};
 311 |             for (key in events) {
 312 |                 if (events.hasOwnProperty(key) && evt.test(key)) {
 313 |                     response[key] = events[key];
 314 |                 }
 315 |             }
 316 |         }
 317 |         else {
 318 |             response = events[evt] || (events[evt] = []);
 319 |         }
 320 | 
 321 |         return response;
 322 |     };
 323 | 
 324 |     /**
 325 |      * Takes a list of listener objects and flattens it into a list of listener functions.
 326 |      *
 327 |      * @param {Object[]} listeners Raw listener objects.
 328 |      * @return {Function[]} Just the listener functions.
 329 |      */
 330 |     proto.flattenListeners = function flattenListeners(listeners) {
 331 |         var flatListeners = [];
 332 |         var i;
 333 | 
 334 |         for (i = 0; i < listeners.length; i += 1) {
 335 |             flatListeners.push(listeners[i].listener);
 336 |         }
 337 | 
 338 |         return flatListeners;
 339 |     };
 340 | 
 341 |     /**
 342 |      * Fetches the requested listeners via getListeners but will always return the results inside an object. This is mainly for internal use but others may find it useful.
 343 |      *
 344 |      * @param {String|RegExp} evt Name of the event to return the listeners from.
 345 |      * @return {Object} All listener functions for an event in an object.
 346 |      */
 347 |     proto.getListenersAsObject = function getListenersAsObject(evt) {
 348 |         var listeners = this.getListeners(evt);
 349 |         var response;
 350 | 
 351 |         if (listeners instanceof Array) {
 352 |             response = {};
 353 |             response[evt] = listeners;
 354 |         }
 355 | 
 356 |         return response || listeners;
 357 |     };
 358 | 
 359 |     /**
 360 |      * Adds a listener function to the specified event.
 361 |      * The listener will not be added if it is a duplicate.
 362 |      * If the listener returns true then it will be removed after it is called.
 363 |      * If you pass a regular expression as the event name then the listener will be added to all events that match it.
 364 |      *
 365 |      * @param {String|RegExp} evt Name of the event to attach the listener to.
 366 |      * @param {Function} listener Method to be called when the event is emitted. If the function returns true then it will be removed after calling.
 367 |      * @return {Object} Current instance of EventEmitter for chaining.
 368 |      */
 369 |     proto.addListener = function addListener(evt, listener) {
 370 |         var listeners = this.getListenersAsObject(evt);
 371 |         var listenerIsWrapped = typeof listener === 'object';
 372 |         var key;
 373 | 
 374 |         for (key in listeners) {
 375 |             if (listeners.hasOwnProperty(key) && indexOfListener(listeners[key], listener) === -1) {
 376 |                 listeners[key].push(listenerIsWrapped ? listener : {
 377 |                     listener: listener,
 378 |                     once: false
 379 |                 });
 380 |             }
 381 |         }
 382 | 
 383 |         return this;
 384 |     };
 385 | 
 386 |     /**
 387 |      * Alias of addListener
 388 |      */
 389 |     proto.on = alias('addListener');
 390 | 
 391 |     /**
 392 |      * Semi-alias of addListener. It will add a listener that will be
 393 |      * automatically removed after its first execution.
 394 |      *
 395 |      * @param {String|RegExp} evt Name of the event to attach the listener to.
 396 |      * @param {Function} listener Method to be called when the event is emitted. If the function returns true then it will be removed after calling.
 397 |      * @return {Object} Current instance of EventEmitter for chaining.
 398 |      */
 399 |     proto.addOnceListener = function addOnceListener(evt, listener) {
 400 |         return this.addListener(evt, {
 401 |             listener: listener,
 402 |             once: true
 403 |         });
 404 |     };
 405 | 
 406 |     /**
 407 |      * Alias of addOnceListener.
 408 |      */
 409 |     proto.once = alias('addOnceListener');
 410 | 
 411 |     /**
 412 |      * Defines an event name. This is required if you want to use a regex to add a listener to multiple events at once. If you don't do this then how do you expect it to know what event to add to? Should it just add to every possible match for a regex? No. That is scary and bad.
 413 |      * You need to tell it what event names should be matched by a regex.
 414 |      *
 415 |      * @param {String} evt Name of the event to create.
 416 |      * @return {Object} Current instance of EventEmitter for chaining.
 417 |      */
 418 |     proto.defineEvent = function defineEvent(evt) {
 419 |         this.getListeners(evt);
 420 |         return this;
 421 |     };
 422 | 
 423 |     /**
 424 |      * Uses defineEvent to define multiple events.
 425 |      *
 426 |      * @param {String[]} evts An array of event names to define.
 427 |      * @return {Object} Current instance of EventEmitter for chaining.
 428 |      */
 429 |     proto.defineEvents = function defineEvents(evts) {
 430 |         for (var i = 0; i < evts.length; i += 1) {
 431 |             this.defineEvent(evts[i]);
 432 |         }
 433 |         return this;
 434 |     };
 435 | 
 436 |     /**
 437 |      * Removes a listener function from the specified event.
 438 |      * When passed a regular expression as the event name, it will remove the listener from all events that match it.
 439 |      *
 440 |      * @param {String|RegExp} evt Name of the event to remove the listener from.
 441 |      * @param {Function} listener Method to remove from the event.
 442 |      * @return {Object} Current instance of EventEmitter for chaining.
 443 |      */
 444 |     proto.removeListener = function removeListener(evt, listener) {
 445 |         var listeners = this.getListenersAsObject(evt);
 446 |         var index;
 447 |         var key;
 448 | 
 449 |         for (key in listeners) {
 450 |             if (listeners.hasOwnProperty(key)) {
 451 |                 index = indexOfListener(listeners[key], listener);
 452 | 
 453 |                 if (index !== -1) {
 454 |                     listeners[key].splice(index, 1);
 455 |                 }
 456 |             }
 457 |         }
 458 | 
 459 |         return this;
 460 |     };
 461 | 
 462 |     /**
 463 |      * Alias of removeListener
 464 |      */
 465 |     proto.off = alias('removeListener');
 466 | 
 467 |     /**
 468 |      * Adds listeners in bulk using the manipulateListeners method.
 469 |      * If you pass an object as the second argument you can add to multiple events at once. The object should contain key value pairs of events and listeners or listener arrays. You can also pass it an event name and an array of listeners to be added.
 470 |      * You can also pass it a regular expression to add the array of listeners to all events that match it.
 471 |      * Yeah, this function does quite a bit. That's probably a bad thing.
 472 |      *
 473 |      * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to add to multiple events at once.
 474 |      * @param {Function[]} [listeners] An optional array of listener functions to add.
 475 |      * @return {Object} Current instance of EventEmitter for chaining.
 476 |      */
 477 |     proto.addListeners = function addListeners(evt, listeners) {
 478 |         // Pass through to manipulateListeners
 479 |         return this.manipulateListeners(false, evt, listeners);
 480 |     };
 481 | 
 482 |     /**
 483 |      * Removes listeners in bulk using the manipulateListeners method.
 484 |      * If you pass an object as the second argument you can remove from multiple events at once. The object should contain key value pairs of events and listeners or listener arrays.
 485 |      * You can also pass it an event name and an array of listeners to be removed.
 486 |      * You can also pass it a regular expression to remove the listeners from all events that match it.
 487 |      *
 488 |      * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to remove from multiple events at once.
 489 |      * @param {Function[]} [listeners] An optional array of listener functions to remove.
 490 |      * @return {Object} Current instance of EventEmitter for chaining.
 491 |      */
 492 |     proto.removeListeners = function removeListeners(evt, listeners) {
 493 |         // Pass through to manipulateListeners
 494 |         return this.manipulateListeners(true, evt, listeners);
 495 |     };
 496 | 
 497 |     /**
 498 |      * Edits listeners in bulk. The addListeners and removeListeners methods both use this to do their job. You should really use those instead, this is a little lower level.
 499 |      * The first argument will determine if the listeners are removed (true) or added (false).
 500 |      * If you pass an object as the second argument you can add/remove from multiple events at once. The object should contain key value pairs of events and listeners or listener arrays.
 501 |      * You can also pass it an event name and an array of listeners to be added/removed.
 502 |      * You can also pass it a regular expression to manipulate the listeners of all events that match it.
 503 |      *
 504 |      * @param {Boolean} remove True if you want to remove listeners, false if you want to add.
 505 |      * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to add/remove from multiple events at once.
 506 |      * @param {Function[]} [listeners] An optional array of listener functions to add/remove.
 507 |      * @return {Object} Current instance of EventEmitter for chaining.
 508 |      */
 509 |     proto.manipulateListeners = function manipulateListeners(remove, evt, listeners) {
 510 |         var i;
 511 |         var value;
 512 |         var single = remove ? this.removeListener : this.addListener;
 513 |         var multiple = remove ? this.removeListeners : this.addListeners;
 514 | 
 515 |         // If evt is an object then pass each of its properties to this method
 516 |         if (typeof evt === 'object' && !(evt instanceof RegExp)) {
 517 |             for (i in evt) {
 518 |                 if (evt.hasOwnProperty(i) && (value = evt[i])) {
 519 |                     // Pass the single listener straight through to the singular method
 520 |                     if (typeof value === 'function') {
 521 |                         single.call(this, i, value);
 522 |                     }
 523 |                     else {
 524 |                         // Otherwise pass back to the multiple function
 525 |                         multiple.call(this, i, value);
 526 |                     }
 527 |                 }
 528 |             }
 529 |         }
 530 |         else {
 531 |             // So evt must be a string
 532 |             // And listeners must be an array of listeners
 533 |             // Loop over it and pass each one to the multiple method
 534 |             i = listeners.length;
 535 |             while (i--) {
 536 |                 single.call(this, evt, listeners[i]);
 537 |             }
 538 |         }
 539 | 
 540 |         return this;
 541 |     };
 542 | 
 543 |     /**
 544 |      * Removes all listeners from a specified event.
 545 |      * If you do not specify an event then all listeners will be removed.
 546 |      * That means every event will be emptied.
 547 |      * You can also pass a regex to remove all events that match it.
 548 |      *
 549 |      * @param {String|RegExp} [evt] Optional name of the event to remove all listeners for. Will remove from every event if not passed.
 550 |      * @return {Object} Current instance of EventEmitter for chaining.
 551 |      */
 552 |     proto.removeEvent = function removeEvent(evt) {
 553 |         var type = typeof evt;
 554 |         var events = this._getEvents();
 555 |         var key;
 556 | 
 557 |         // Remove different things depending on the state of evt
 558 |         if (type === 'string') {
 559 |             // Remove all listeners for the specified event
 560 |             delete events[evt];
 561 |         }
 562 |         else if (evt instanceof RegExp) {
 563 |             // Remove all events matching the regex.
 564 |             for (key in events) {
 565 |                 if (events.hasOwnProperty(key) && evt.test(key)) {
 566 |                     delete events[key];
 567 |                 }
 568 |             }
 569 |         }
 570 |         else {
 571 |             // Remove all listeners in all events
 572 |             delete this._events;
 573 |         }
 574 | 
 575 |         return this;
 576 |     };
 577 | 
 578 |     /**
 579 |      * Alias of removeEvent.
 580 |      *
 581 |      * Added to mirror the node API.
 582 |      */
 583 |     proto.removeAllListeners = alias('removeEvent');
 584 | 
 585 |     /**
 586 |      * Emits an event of your choice.
 587 |      * When emitted, every listener attached to that event will be executed.
 588 |      * If you pass the optional argument array then those arguments will be passed to every listener upon execution.
 589 |      * Because it uses `apply`, your array of arguments will be passed as if you wrote them out separately.
 590 |      * So they will not arrive within the array on the other side, they will be separate.
 591 |      * You can also pass a regular expression to emit to all events that match it.
 592 |      *
 593 |      * @param {String|RegExp} evt Name of the event to emit and execute listeners for.
 594 |      * @param {Array} [args] Optional array of arguments to be passed to each listener.
 595 |      * @return {Object} Current instance of EventEmitter for chaining.
 596 |      */
 597 |     proto.emitEvent = function emitEvent(evt, args) {
 598 |         var listeners = this.getListenersAsObject(evt);
 599 |         var listener;
 600 |         var i;
 601 |         var key;
 602 |         var response;
 603 | 
 604 |         for (key in listeners) {
 605 |             if (listeners.hasOwnProperty(key)) {
 606 |                 i = listeners[key].length;
 607 | 
 608 |                 while (i--) {
 609 |                     // If the listener returns true then it shall be removed from the event
 610 |                     // The function is executed either with a basic call or an apply if there is an args array
 611 |                     listener = listeners[key][i];
 612 | 
 613 |                     if (listener.once === true) {
 614 |                         this.removeListener(evt, listener.listener);
 615 |                     }
 616 | 
 617 |                     response = listener.listener.apply(this, args || []);
 618 | 
 619 |                     if (response === this._getOnceReturnValue()) {
 620 |                         this.removeListener(evt, listener.listener);
 621 |                     }
 622 |                 }
 623 |             }
 624 |         }
 625 | 
 626 |         return this;
 627 |     };
 628 | 
 629 |     /**
 630 |      * Alias of emitEvent
 631 |      */
 632 |     proto.trigger = alias('emitEvent');
 633 | 
 634 |     /**
 635 |      * Subtly different from emitEvent in that it will pass its arguments on to the listeners, as opposed to taking a single array of arguments to pass on.
 636 |      * As with emitEvent, you can pass a regex in place of the event name to emit to all events that match it.
 637 |      *
 638 |      * @param {String|RegExp} evt Name of the event to emit and execute listeners for.
 639 |      * @param {...*} Optional additional arguments to be passed to each listener.
 640 |      * @return {Object} Current instance of EventEmitter for chaining.
 641 |      */
 642 |     proto.emit = function emit(evt) {
 643 |         var args = Array.prototype.slice.call(arguments, 1);
 644 |         return this.emitEvent(evt, args);
 645 |     };
 646 | 
 647 |     /**
 648 |      * Sets the current value to check against when executing listeners. If a
 649 |      * listeners return value matches the one set here then it will be removed
 650 |      * after execution. This value defaults to true.
 651 |      *
 652 |      * @param {*} value The new value to check for when executing listeners.
 653 |      * @return {Object} Current instance of EventEmitter for chaining.
 654 |      */
 655 |     proto.setOnceReturnValue = function setOnceReturnValue(value) {
 656 |         this._onceReturnValue = value;
 657 |         return this;
 658 |     };
 659 | 
 660 |     /**
 661 |      * Fetches the current value to check against when executing listeners. If
 662 |      * the listeners return value matches this one then it should be removed
 663 |      * automatically. It will return true by default.
 664 |      *
 665 |      * @return {*|Boolean} The current value to check for or the default, true.
 666 |      * @api private
 667 |      */
 668 |     proto._getOnceReturnValue = function _getOnceReturnValue() {
 669 |         if (this.hasOwnProperty('_onceReturnValue')) {
 670 |             return this._onceReturnValue;
 671 |         }
 672 |         else {
 673 |             return true;
 674 |         }
 675 |     };
 676 | 
 677 |     /**
 678 |      * Fetches the events object and creates one if required.
 679 |      *
 680 |      * @return {Object} The events storage object.
 681 |      * @api private
 682 |      */
 683 |     proto._getEvents = function _getEvents() {
 684 |         return this._events || (this._events = {});
 685 |     };
 686 | 
 687 |     /**
 688 |      * Reverts the global {@link EventEmitter} to its previous value and returns a reference to this version.
 689 |      *
 690 |      * @return {Function} Non conflicting EventEmitter class.
 691 |      */
 692 |     EventEmitter.noConflict = function noConflict() {
 693 |         exports.EventEmitter = originalGlobalValue;
 694 |         return EventEmitter;
 695 |     };
 696 | 
 697 |     // Expose the class either via AMD, CommonJS or the global object
 698 |     if (typeof define === 'function' && define.amd) {
 699 |         define('eventEmitter/EventEmitter',[],function () {
 700 |             return EventEmitter;
 701 |         });
 702 |     }
 703 |     else if (typeof module === 'object' && module.exports){
 704 |         module.exports = EventEmitter;
 705 |     }
 706 |     else {
 707 |         exports.EventEmitter = EventEmitter;
 708 |     }
 709 | }.call(this));
 710 | 
 711 | /*!
 712 |  * eventie v1.0.6
 713 |  * event binding helper
 714 |  *   eventie.bind( elem, 'click', myFn )
 715 |  *   eventie.unbind( elem, 'click', myFn )
 716 |  * MIT license
 717 |  */
 718 | 
 719 | /*jshint browser: true, undef: true, unused: true */
 720 | /*global define: false, module: false */
 721 | 
 722 | ( function( window ) {
 723 | 
 724 | 
 725 | 
 726 | var docElem = document.documentElement;
 727 | 
 728 | var bind = function() {};
 729 | 
 730 | function getIEEvent( obj ) {
 731 |   var event = window.event;
 732 |   // add event.target
 733 |   event.target = event.target || event.srcElement || obj;
 734 |   return event;
 735 | }
 736 | 
 737 | if ( docElem.addEventListener ) {
 738 |   bind = function( obj, type, fn ) {
 739 |     obj.addEventListener( type, fn, false );
 740 |   };
 741 | } else if ( docElem.attachEvent ) {
 742 |   bind = function( obj, type, fn ) {
 743 |     obj[ type + fn ] = fn.handleEvent ?
 744 |       function() {
 745 |         var event = getIEEvent( obj );
 746 |         fn.handleEvent.call( fn, event );
 747 |       } :
 748 |       function() {
 749 |         var event = getIEEvent( obj );
 750 |         fn.call( obj, event );
 751 |       };
 752 |     obj.attachEvent( "on" + type, obj[ type + fn ] );
 753 |   };
 754 | }
 755 | 
 756 | var unbind = function() {};
 757 | 
 758 | if ( docElem.removeEventListener ) {
 759 |   unbind = function( obj, type, fn ) {
 760 |     obj.removeEventListener( type, fn, false );
 761 |   };
 762 | } else if ( docElem.detachEvent ) {
 763 |   unbind = function( obj, type, fn ) {
 764 |     obj.detachEvent( "on" + type, obj[ type + fn ] );
 765 |     try {
 766 |       delete obj[ type + fn ];
 767 |     } catch ( err ) {
 768 |       // can't delete window object properties
 769 |       obj[ type + fn ] = undefined;
 770 |     }
 771 |   };
 772 | }
 773 | 
 774 | var eventie = {
 775 |   bind: bind,
 776 |   unbind: unbind
 777 | };
 778 | 
 779 | // ----- module definition ----- //
 780 | 
 781 | if ( typeof define === 'function' && define.amd ) {
 782 |   // AMD
 783 |   define( 'eventie/eventie',eventie );
 784 | } else if ( typeof exports === 'object' ) {
 785 |   // CommonJS
 786 |   module.exports = eventie;
 787 | } else {
 788 |   // browser global
 789 |   window.eventie = eventie;
 790 | }
 791 | 
 792 | })( window );
 793 | 
 794 | /*!
 795 |  * getStyleProperty v1.0.4
 796 |  * original by kangax
 797 |  * http://perfectionkills.com/feature-testing-css-properties/
 798 |  * MIT license
 799 |  */
 800 | 
 801 | /*jshint browser: true, strict: true, undef: true */
 802 | /*global define: false, exports: false, module: false */
 803 | 
 804 | ( function( window ) {
 805 | 
 806 | 
 807 | 
 808 | var prefixes = 'Webkit Moz ms Ms O'.split(' ');
 809 | var docElemStyle = document.documentElement.style;
 810 | 
 811 | function getStyleProperty( propName ) {
 812 |   if ( !propName ) {
 813 |     return;
 814 |   }
 815 | 
 816 |   // test standard property first
 817 |   if ( typeof docElemStyle[ propName ] === 'string' ) {
 818 |     return propName;
 819 |   }
 820 | 
 821 |   // capitalize
 822 |   propName = propName.charAt(0).toUpperCase() + propName.slice(1);
 823 | 
 824 |   // test vendor specific properties
 825 |   var prefixed;
 826 |   for ( var i=0, len = prefixes.length; i < len; i++ ) {
 827 |     prefixed = prefixes[i] + propName;
 828 |     if ( typeof docElemStyle[ prefixed ] === 'string' ) {
 829 |       return prefixed;
 830 |     }
 831 |   }
 832 | }
 833 | 
 834 | // transport
 835 | if ( typeof define === 'function' && define.amd ) {
 836 |   // AMD
 837 |   define( 'get-style-property/get-style-property',[],function() {
 838 |     return getStyleProperty;
 839 |   });
 840 | } else if ( typeof exports === 'object' ) {
 841 |   // CommonJS for Component
 842 |   module.exports = getStyleProperty;
 843 | } else {
 844 |   // browser global
 845 |   window.getStyleProperty = getStyleProperty;
 846 | }
 847 | 
 848 | })( window );
 849 | 
 850 | /*!
 851 |  * getSize v1.2.2
 852 |  * measure size of elements
 853 |  * MIT license
 854 |  */
 855 | 
 856 | /*jshint browser: true, strict: true, undef: true, unused: true */
 857 | /*global define: false, exports: false, require: false, module: false, console: false */
 858 | 
 859 | ( function( window, undefined ) {
 860 | 
 861 | 
 862 | 
 863 | // -------------------------- helpers -------------------------- //
 864 | 
 865 | // get a number from a string, not a percentage
 866 | function getStyleSize( value ) {
 867 |   var num = parseFloat( value );
 868 |   // not a percent like '100%', and a number
 869 |   var isValid = value.indexOf('%') === -1 && !isNaN( num );
 870 |   return isValid && num;
 871 | }
 872 | 
 873 | function noop() {}
 874 | 
 875 | var logError = typeof console === 'undefined' ? noop :
 876 |   function( message ) {
 877 |     console.error( message );
 878 |   };
 879 | 
 880 | // -------------------------- measurements -------------------------- //
 881 | 
 882 | var measurements = [
 883 |   'paddingLeft',
 884 |   'paddingRight',
 885 |   'paddingTop',
 886 |   'paddingBottom',
 887 |   'marginLeft',
 888 |   'marginRight',
 889 |   'marginTop',
 890 |   'marginBottom',
 891 |   'borderLeftWidth',
 892 |   'borderRightWidth',
 893 |   'borderTopWidth',
 894 |   'borderBottomWidth'
 895 | ];
 896 | 
 897 | function getZeroSize() {
 898 |   var size = {
 899 |     width: 0,
 900 |     height: 0,
 901 |     innerWidth: 0,
 902 |     innerHeight: 0,
 903 |     outerWidth: 0,
 904 |     outerHeight: 0
 905 |   };
 906 |   for ( var i=0, len = measurements.length; i < len; i++ ) {
 907 |     var measurement = measurements[i];
 908 |     size[ measurement ] = 0;
 909 |   }
 910 |   return size;
 911 | }
 912 | 
 913 | 
 914 | 
 915 | function defineGetSize( getStyleProperty ) {
 916 | 
 917 | // -------------------------- setup -------------------------- //
 918 | 
 919 | var isSetup = false;
 920 | 
 921 | var getStyle, boxSizingProp, isBoxSizeOuter;
 922 | 
 923 | /**
 924 |  * setup vars and functions
 925 |  * do it on initial getSize(), rather than on script load
 926 |  * For Firefox bug https://bugzilla.mozilla.org/show_bug.cgi?id=548397
 927 |  */
 928 | function setup() {
 929 |   // setup once
 930 |   if ( isSetup ) {
 931 |     return;
 932 |   }
 933 |   isSetup = true;
 934 | 
 935 |   var getComputedStyle = window.getComputedStyle;
 936 |   getStyle = ( function() {
 937 |     var getStyleFn = getComputedStyle ?
 938 |       function( elem ) {
 939 |         return getComputedStyle( elem, null );
 940 |       } :
 941 |       function( elem ) {
 942 |         return elem.currentStyle;
 943 |       };
 944 | 
 945 |       return function getStyle( elem ) {
 946 |         var style = getStyleFn( elem );
 947 |         if ( !style ) {
 948 |           logError( 'Style returned ' + style +
 949 |             '. Are you running this code in a hidden iframe on Firefox? ' +
 950 |             'See http://bit.ly/getsizebug1' );
 951 |         }
 952 |         return style;
 953 |       };
 954 |   })();
 955 | 
 956 |   // -------------------------- box sizing -------------------------- //
 957 | 
 958 |   boxSizingProp = getStyleProperty('boxSizing');
 959 | 
 960 |   /**
 961 |    * WebKit measures the outer-width on style.width on border-box elems
 962 |    * IE & Firefox measures the inner-width
 963 |    */
 964 |   if ( boxSizingProp ) {
 965 |     var div = document.createElement('div');
 966 |     div.style.width = '200px';
 967 |     div.style.padding = '1px 2px 3px 4px';
 968 |     div.style.borderStyle = 'solid';
 969 |     div.style.borderWidth = '1px 2px 3px 4px';
 970 |     div.style[ boxSizingProp ] = 'border-box';
 971 | 
 972 |     var body = document.body || document.documentElement;
 973 |     body.appendChild( div );
 974 |     var style = getStyle( div );
 975 | 
 976 |     isBoxSizeOuter = getStyleSize( style.width ) === 200;
 977 |     body.removeChild( div );
 978 |   }
 979 | 
 980 | }
 981 | 
 982 | // -------------------------- getSize -------------------------- //
 983 | 
 984 | function getSize( elem ) {
 985 |   setup();
 986 | 
 987 |   // use querySeletor if elem is string
 988 |   if ( typeof elem === 'string' ) {
 989 |     elem = document.querySelector( elem );
 990 |   }
 991 | 
 992 |   // do not proceed on non-objects
 993 |   if ( !elem || typeof elem !== 'object' || !elem.nodeType ) {
 994 |     return;
 995 |   }
 996 | 
 997 |   var style = getStyle( elem );
 998 | 
 999 |   // if hidden, everything is 0
1000 |   if ( style.display === 'none' ) {
1001 |     return getZeroSize();
1002 |   }
1003 | 
1004 |   var size = {};
1005 |   size.width = elem.offsetWidth;
1006 |   size.height = elem.offsetHeight;
1007 | 
1008 |   var isBorderBox = size.isBorderBox = !!( boxSizingProp &&
1009 |     style[ boxSizingProp ] && style[ boxSizingProp ] === 'border-box' );
1010 | 
1011 |   // get all measurements
1012 |   for ( var i=0, len = measurements.length; i < len; i++ ) {
1013 |     var measurement = measurements[i];
1014 |     var value = style[ measurement ];
1015 |     value = mungeNonPixel( elem, value );
1016 |     var num = parseFloat( value );
1017 |     // any 'auto', 'medium' value will be 0
1018 |     size[ measurement ] = !isNaN( num ) ? num : 0;
1019 |   }
1020 | 
1021 |   var paddingWidth = size.paddingLeft + size.paddingRight;
1022 |   var paddingHeight = size.paddingTop + size.paddingBottom;
1023 |   var marginWidth = size.marginLeft + size.marginRight;
1024 |   var marginHeight = size.marginTop + size.marginBottom;
1025 |   var borderWidth = size.borderLeftWidth + size.borderRightWidth;
1026 |   var borderHeight = size.borderTopWidth + size.borderBottomWidth;
1027 | 
1028 |   var isBorderBoxSizeOuter = isBorderBox && isBoxSizeOuter;
1029 | 
1030 |   // overwrite width and height if we can get it from style
1031 |   var styleWidth = getStyleSize( style.width );
1032 |   if ( styleWidth !== false ) {
1033 |     size.width = styleWidth +
1034 |       // add padding and border unless it's already including it
1035 |       ( isBorderBoxSizeOuter ? 0 : paddingWidth + borderWidth );
1036 |   }
1037 | 
1038 |   var styleHeight = getStyleSize( style.height );
1039 |   if ( styleHeight !== false ) {
1040 |     size.height = styleHeight +
1041 |       // add padding and border unless it's already including it
1042 |       ( isBorderBoxSizeOuter ? 0 : paddingHeight + borderHeight );
1043 |   }
1044 | 
1045 |   size.innerWidth = size.width - ( paddingWidth + borderWidth );
1046 |   size.innerHeight = size.height - ( paddingHeight + borderHeight );
1047 | 
1048 |   size.outerWidth = size.width + marginWidth;
1049 |   size.outerHeight = size.height + marginHeight;
1050 | 
1051 |   return size;
1052 | }
1053 | 
1054 | // IE8 returns percent values, not pixels
1055 | // taken from jQuery's curCSS
1056 | function mungeNonPixel( elem, value ) {
1057 |   // IE8 and has percent value
1058 |   if ( window.getComputedStyle || value.indexOf('%') === -1 ) {
1059 |     return value;
1060 |   }
1061 |   var style = elem.style;
1062 |   // Remember the original values
1063 |   var left = style.left;
1064 |   var rs = elem.runtimeStyle;
1065 |   var rsLeft = rs && rs.left;
1066 | 
1067 |   // Put in the new values to get a computed value out
1068 |   if ( rsLeft ) {
1069 |     rs.left = elem.currentStyle.left;
1070 |   }
1071 |   style.left = value;
1072 |   value = style.pixelLeft;
1073 | 
1074 |   // Revert the changed values
1075 |   style.left = left;
1076 |   if ( rsLeft ) {
1077 |     rs.left = rsLeft;
1078 |   }
1079 | 
1080 |   return value;
1081 | }
1082 | 
1083 | return getSize;
1084 | 
1085 | }
1086 | 
1087 | // transport
1088 | if ( typeof define === 'function' && define.amd ) {
1089 |   // AMD for RequireJS
1090 |   define( 'get-size/get-size',[ 'get-style-property/get-style-property' ], defineGetSize );
1091 | } else if ( typeof exports === 'object' ) {
1092 |   // CommonJS for Component
1093 |   module.exports = defineGetSize( require('desandro-get-style-property') );
1094 | } else {
1095 |   // browser global
1096 |   window.getSize = defineGetSize( window.getStyleProperty );
1097 | }
1098 | 
1099 | })( window );
1100 | 
1101 | /*!
1102 |  * docReady v1.0.4
1103 |  * Cross browser DOMContentLoaded event emitter
1104 |  * MIT license
1105 |  */
1106 | 
1107 | /*jshint browser: true, strict: true, undef: true, unused: true*/
1108 | /*global define: false, require: false, module: false */
1109 | 
1110 | ( function( window ) {
1111 | 
1112 | 
1113 | 
1114 | var document = window.document;
1115 | // collection of functions to be triggered on ready
1116 | var queue = [];
1117 | 
1118 | function docReady( fn ) {
1119 |   // throw out non-functions
1120 |   if ( typeof fn !== 'function' ) {
1121 |     return;
1122 |   }
1123 | 
1124 |   if ( docReady.isReady ) {
1125 |     // ready now, hit it
1126 |     fn();
1127 |   } else {
1128 |     // queue function when ready
1129 |     queue.push( fn );
1130 |   }
1131 | }
1132 | 
1133 | docReady.isReady = false;
1134 | 
1135 | // triggered on various doc ready events
1136 | function onReady( event ) {
1137 |   // bail if already triggered or IE8 document is not ready just yet
1138 |   var isIE8NotReady = event.type === 'readystatechange' && document.readyState !== 'complete';
1139 |   if ( docReady.isReady || isIE8NotReady ) {
1140 |     return;
1141 |   }
1142 | 
1143 |   trigger();
1144 | }
1145 | 
1146 | function trigger() {
1147 |   docReady.isReady = true;
1148 |   // process queue
1149 |   for ( var i=0, len = queue.length; i < len; i++ ) {
1150 |     var fn = queue[i];
1151 |     fn();
1152 |   }
1153 | }
1154 | 
1155 | function defineDocReady( eventie ) {
1156 |   // trigger ready if page is ready
1157 |   if ( document.readyState === 'complete' ) {
1158 |     trigger();
1159 |   } else {
1160 |     // listen for events
1161 |     eventie.bind( document, 'DOMContentLoaded', onReady );
1162 |     eventie.bind( document, 'readystatechange', onReady );
1163 |     eventie.bind( window, 'load', onReady );
1164 |   }
1165 | 
1166 |   return docReady;
1167 | }
1168 | 
1169 | // transport
1170 | if ( typeof define === 'function' && define.amd ) {
1171 |   // AMD
1172 |   define( 'doc-ready/doc-ready',[ 'eventie/eventie' ], defineDocReady );
1173 | } else if ( typeof exports === 'object' ) {
1174 |   module.exports = defineDocReady( require('eventie') );
1175 | } else {
1176 |   // browser global
1177 |   window.docReady = defineDocReady( window.eventie );
1178 | }
1179 | 
1180 | })( window );
1181 | 
1182 | /**
1183 |  * matchesSelector v1.0.3
1184 |  * matchesSelector( element, '.selector' )
1185 |  * MIT license
1186 |  */
1187 | 
1188 | /*jshint browser: true, strict: true, undef: true, unused: true */
1189 | /*global define: false, module: false */
1190 | 
1191 | ( function( ElemProto ) {
1192 | 
1193 |   
1194 | 
1195 |   var matchesMethod = ( function() {
1196 |     // check for the standard method name first
1197 |     if ( ElemProto.matches ) {
1198 |       return 'matches';
1199 |     }
1200 |     // check un-prefixed
1201 |     if ( ElemProto.matchesSelector ) {
1202 |       return 'matchesSelector';
1203 |     }
1204 |     // check vendor prefixes
1205 |     var prefixes = [ 'webkit', 'moz', 'ms', 'o' ];
1206 | 
1207 |     for ( var i=0, len = prefixes.length; i < len; i++ ) {
1208 |       var prefix = prefixes[i];
1209 |       var method = prefix + 'MatchesSelector';
1210 |       if ( ElemProto[ method ] ) {
1211 |         return method;
1212 |       }
1213 |     }
1214 |   })();
1215 | 
1216 |   // ----- match ----- //
1217 | 
1218 |   function match( elem, selector ) {
1219 |     return elem[ matchesMethod ]( selector );
1220 |   }
1221 | 
1222 |   // ----- appendToFragment ----- //
1223 | 
1224 |   function checkParent( elem ) {
1225 |     // not needed if already has parent
1226 |     if ( elem.parentNode ) {
1227 |       return;
1228 |     }
1229 |     var fragment = document.createDocumentFragment();
1230 |     fragment.appendChild( elem );
1231 |   }
1232 | 
1233 |   // ----- query ----- //
1234 | 
1235 |   // fall back to using QSA
1236 |   // thx @jonathantneal https://gist.github.com/3062955
1237 |   function query( elem, selector ) {
1238 |     // append to fragment if no parent
1239 |     checkParent( elem );
1240 | 
1241 |     // match elem with all selected elems of parent
1242 |     var elems = elem.parentNode.querySelectorAll( selector );
1243 |     for ( var i=0, len = elems.length; i < len; i++ ) {
1244 |       // return true if match
1245 |       if ( elems[i] === elem ) {
1246 |         return true;
1247 |       }
1248 |     }
1249 |     // otherwise return false
1250 |     return false;
1251 |   }
1252 | 
1253 |   // ----- matchChild ----- //
1254 | 
1255 |   function matchChild( elem, selector ) {
1256 |     checkParent( elem );
1257 |     return match( elem, selector );
1258 |   }
1259 | 
1260 |   // ----- matchesSelector ----- //
1261 | 
1262 |   var matchesSelector;
1263 | 
1264 |   if ( matchesMethod ) {
1265 |     // IE9 supports matchesSelector, but doesn't work on orphaned elems
1266 |     // check for that
1267 |     var div = document.createElement('div');
1268 |     var supportsOrphans = match( div, 'div' );
1269 |     matchesSelector = supportsOrphans ? match : matchChild;
1270 |   } else {
1271 |     matchesSelector = query;
1272 |   }
1273 | 
1274 |   // transport
1275 |   if ( typeof define === 'function' && define.amd ) {
1276 |     // AMD
1277 |     define( 'matches-selector/matches-selector',[],function() {
1278 |       return matchesSelector;
1279 |     });
1280 |   } else if ( typeof exports === 'object' ) {
1281 |     module.exports = matchesSelector;
1282 |   }
1283 |   else {
1284 |     // browser global
1285 |     window.matchesSelector = matchesSelector;
1286 |   }
1287 | 
1288 | })( Element.prototype );
1289 | 
1290 | /**
1291 |  * Fizzy UI utils v1.0.1
1292 |  * MIT license
1293 |  */
1294 | 
1295 | /*jshint browser: true, undef: true, unused: true, strict: true */
1296 | 
1297 | ( function( window, factory ) {
1298 |   /*global define: false, module: false, require: false */
1299 |   
1300 |   // universal module definition
1301 | 
1302 |   if ( typeof define == 'function' && define.amd ) {
1303 |     // AMD
1304 |     define( 'fizzy-ui-utils/utils',[
1305 |       'doc-ready/doc-ready',
1306 |       'matches-selector/matches-selector'
1307 |     ], function( docReady, matchesSelector ) {
1308 |       return factory( window, docReady, matchesSelector );
1309 |     });
1310 |   } else if ( typeof exports == 'object' ) {
1311 |     // CommonJS
1312 |     module.exports = factory(
1313 |       window,
1314 |       require('doc-ready'),
1315 |       require('desandro-matches-selector')
1316 |     );
1317 |   } else {
1318 |     // browser global
1319 |     window.fizzyUIUtils = factory(
1320 |       window,
1321 |       window.docReady,
1322 |       window.matchesSelector
1323 |     );
1324 |   }
1325 | 
1326 | }( window, function factory( window, docReady, matchesSelector ) {
1327 | 
1328 | 
1329 | 
1330 | var utils = {};
1331 | 
1332 | // ----- extend ----- //
1333 | 
1334 | // extends objects
1335 | utils.extend = function( a, b ) {
1336 |   for ( var prop in b ) {
1337 |     a[ prop ] = b[ prop ];
1338 |   }
1339 |   return a;
1340 | };
1341 | 
1342 | // ----- modulo ----- //
1343 | 
1344 | utils.modulo = function( num, div ) {
1345 |   return ( ( num % div ) + div ) % div;
1346 | };
1347 | 
1348 | // ----- isArray ----- //
1349 |   
1350 | var objToString = Object.prototype.toString;
1351 | utils.isArray = function( obj ) {
1352 |   return objToString.call( obj ) == '[object Array]';
1353 | };
1354 | 
1355 | // ----- makeArray ----- //
1356 | 
1357 | // turn element or nodeList into an array
1358 | utils.makeArray = function( obj ) {
1359 |   var ary = [];
1360 |   if ( utils.isArray( obj ) ) {
1361 |     // use object if already an array
1362 |     ary = obj;
1363 |   } else if ( obj && typeof obj.length == 'number' ) {
1364 |     // convert nodeList to array
1365 |     for ( var i=0, len = obj.length; i < len; i++ ) {
1366 |       ary.push( obj[i] );
1367 |     }
1368 |   } else {
1369 |     // array of single index
1370 |     ary.push( obj );
1371 |   }
1372 |   return ary;
1373 | };
1374 | 
1375 | // ----- indexOf ----- //
1376 | 
1377 | // index of helper cause IE8
1378 | utils.indexOf = Array.prototype.indexOf ? function( ary, obj ) {
1379 |     return ary.indexOf( obj );
1380 |   } : function( ary, obj ) {
1381 |     for ( var i=0, len = ary.length; i < len; i++ ) {
1382 |       if ( ary[i] === obj ) {
1383 |         return i;
1384 |       }
1385 |     }
1386 |     return -1;
1387 |   };
1388 | 
1389 | // ----- removeFrom ----- //
1390 | 
1391 | utils.removeFrom = function( ary, obj ) {
1392 |   var index = utils.indexOf( ary, obj );
1393 |   if ( index != -1 ) {
1394 |     ary.splice( index, 1 );
1395 |   }
1396 | };
1397 | 
1398 | // ----- isElement ----- //
1399 | 
1400 | // http://stackoverflow.com/a/384380/182183
1401 | utils.isElement = ( typeof HTMLElement == 'function' || typeof HTMLElement == 'object' ) ?
1402 |   function isElementDOM2( obj ) {
1403 |     return obj instanceof HTMLElement;
1404 |   } :
1405 |   function isElementQuirky( obj ) {
1406 |     return obj && typeof obj == 'object' &&
1407 |       obj.nodeType == 1 && typeof obj.nodeName == 'string';
1408 |   };
1409 | 
1410 | // ----- setText ----- //
1411 | 
1412 | utils.setText = ( function() {
1413 |   var setTextProperty;
1414 |   function setText( elem, text ) {
1415 |     // only check setTextProperty once
1416 |     setTextProperty = setTextProperty || ( document.documentElement.textContent !== undefined ? 'textContent' : 'innerText' );
1417 |     elem[ setTextProperty ] = text;
1418 |   }
1419 |   return setText;
1420 | })();
1421 | 
1422 | // ----- getParent ----- //
1423 | 
1424 | utils.getParent = function( elem, selector ) {
1425 |   while ( elem != document.body ) {
1426 |     elem = elem.parentNode;
1427 |     if ( matchesSelector( elem, selector ) ) {
1428 |       return elem;
1429 |     }
1430 |   }
1431 | };
1432 | 
1433 | // ----- getQueryElement ----- //
1434 | 
1435 | // use element as selector string
1436 | utils.getQueryElement = function( elem ) {
1437 |   if ( typeof elem == 'string' ) {
1438 |     return document.querySelector( elem );
1439 |   }
1440 |   return elem;
1441 | };
1442 | 
1443 | // ----- handleEvent ----- //
1444 | 
1445 | // enable .ontype to trigger from .addEventListener( elem, 'type' )
1446 | utils.handleEvent = function( event ) {
1447 |   var method = 'on' + event.type;
1448 |   if ( this[ method ] ) {
1449 |     this[ method ]( event );
1450 |   }
1451 | };
1452 | 
1453 | // ----- filterFindElements ----- //
1454 | 
1455 | utils.filterFindElements = function( elems, selector ) {
1456 |   // make array of elems
1457 |   elems = utils.makeArray( elems );
1458 |   var ffElems = [];
1459 | 
1460 |   for ( var i=0, len = elems.length; i < len; i++ ) {
1461 |     var elem = elems[i];
1462 |     // check that elem is an actual element
1463 |     if ( !utils.isElement( elem ) ) {
1464 |       continue;
1465 |     }
1466 |     // filter & find items if we have a selector
1467 |     if ( selector ) {
1468 |       // filter siblings
1469 |       if ( matchesSelector( elem, selector ) ) {
1470 |         ffElems.push( elem );
1471 |       }
1472 |       // find children
1473 |       var childElems = elem.querySelectorAll( selector );
1474 |       // concat childElems to filterFound array
1475 |       for ( var j=0, jLen = childElems.length; j < jLen; j++ ) {
1476 |         ffElems.push( childElems[j] );
1477 |       }
1478 |     } else {
1479 |       ffElems.push( elem );
1480 |     }
1481 |   }
1482 | 
1483 |   return ffElems;
1484 | };
1485 | 
1486 | // ----- debounceMethod ----- //
1487 | 
1488 | utils.debounceMethod = function( _class, methodName, threshold ) {
1489 |   // original method
1490 |   var method = _class.prototype[ methodName ];
1491 |   var timeoutName = methodName + 'Timeout';
1492 | 
1493 |   _class.prototype[ methodName ] = function() {
1494 |     var timeout = this[ timeoutName ];
1495 |     if ( timeout ) {
1496 |       clearTimeout( timeout );
1497 |     }
1498 |     var args = arguments;
1499 | 
1500 |     var _this = this;
1501 |     this[ timeoutName ] = setTimeout( function() {
1502 |       method.apply( _this, args );
1503 |       delete _this[ timeoutName ];
1504 |     }, threshold || 100 );
1505 |   };
1506 | };
1507 | 
1508 | // ----- htmlInit ----- //
1509 | 
1510 | // http://jamesroberts.name/blog/2010/02/22/string-functions-for-javascript-trim-to-camel-case-to-dashed-and-to-underscore/
1511 | utils.toDashed = function( str ) {
1512 |   return str.replace( /(.)([A-Z])/g, function( match, $1, $2 ) {
1513 |     return $1 + '-' + $2;
1514 |   }).toLowerCase();
1515 | };
1516 | 
1517 | var console = window.console;
1518 | /**
1519 |  * allow user to initialize classes via .js-namespace class
1520 |  * htmlInit( Widget, 'widgetName' )
1521 |  * options are parsed from data-namespace-option attribute
1522 |  */
1523 | utils.htmlInit = function( WidgetClass, namespace ) {
1524 |   docReady( function() {
1525 |     var dashedNamespace = utils.toDashed( namespace );
1526 |     var elems = document.querySelectorAll( '.js-' + dashedNamespace );
1527 |     var dataAttr = 'data-' + dashedNamespace + '-options';
1528 | 
1529 |     for ( var i=0, len = elems.length; i < len; i++ ) {
1530 |       var elem = elems[i];
1531 |       var attr = elem.getAttribute( dataAttr );
1532 |       var options;
1533 |       try {
1534 |         options = attr && JSON.parse( attr );
1535 |       } catch ( error ) {
1536 |         // log error, do not initialize
1537 |         if ( console ) {
1538 |           console.error( 'Error parsing ' + dataAttr + ' on ' +
1539 |             elem.nodeName.toLowerCase() + ( elem.id ? '#' + elem.id : '' ) + ': ' +
1540 |             error );
1541 |         }
1542 |         continue;
1543 |       }
1544 |       // initialize
1545 |       var instance = new WidgetClass( elem, options );
1546 |       // make available via $().data('layoutname')
1547 |       var jQuery = window.jQuery;
1548 |       if ( jQuery ) {
1549 |         jQuery.data( elem, namespace, instance );
1550 |       }
1551 |     }
1552 |   });
1553 | };
1554 | 
1555 | // -----  ----- //
1556 | 
1557 | return utils;
1558 | 
1559 | }));
1560 | 
1561 | ( function( window, factory ) {
1562 |   
1563 |   // universal module definition
1564 | 
1565 |   if ( typeof define == 'function' && define.amd ) {
1566 |     // AMD
1567 |     define( 'flickity/js/cell',[
1568 |       'get-size/get-size'
1569 |     ], function( getSize ) {
1570 |       return factory( window, getSize );
1571 |     });
1572 |   } else if ( typeof exports == 'object' ) {
1573 |     // CommonJS
1574 |     module.exports = factory(
1575 |       window,
1576 |       require('get-size')
1577 |     );
1578 |   } else {
1579 |     // browser global
1580 |     window.Flickity = window.Flickity || {};
1581 |     window.Flickity.Cell = factory(
1582 |       window,
1583 |       window.getSize
1584 |     );
1585 |   }
1586 | 
1587 | }( window, function factory( window, getSize ) {
1588 | 
1589 | 
1590 | 
1591 | function Cell( elem, parent ) {
1592 |   this.element = elem;
1593 |   this.parent = parent;
1594 | 
1595 |   this.create();
1596 | }
1597 | 
1598 | var isIE8 = 'attachEvent' in window;
1599 | 
1600 | Cell.prototype.create = function() {
1601 |   this.element.style.position = 'absolute';
1602 |   // IE8 prevent child from changing focus http://stackoverflow.com/a/17525223/182183
1603 |   if ( isIE8 ) {
1604 |     this.element.setAttribute( 'unselectable', 'on' );
1605 |   }
1606 |   this.x = 0;
1607 |   this.shift = 0;
1608 | };
1609 | 
1610 | Cell.prototype.destroy = function() {
1611 |   // reset style
1612 |   this.element.style.position = '';
1613 |   var side = this.parent.originSide;
1614 |   this.element.style[ side ] = '';
1615 | };
1616 | 
1617 | Cell.prototype.getSize = function() {
1618 |   this.size = getSize( this.element );
1619 | };
1620 | 
1621 | Cell.prototype.setPosition = function( x ) {
1622 |   this.x = x;
1623 |   this.setDefaultTarget();
1624 |   this.renderPosition( x );
1625 | };
1626 | 
1627 | Cell.prototype.setDefaultTarget = function() {
1628 |   var marginProperty = this.parent.originSide == 'left' ? 'marginLeft' : 'marginRight';
1629 |   this.target = this.x + this.size[ marginProperty ] +
1630 |     this.size.width * this.parent.cellAlign;
1631 | };
1632 | 
1633 | Cell.prototype.renderPosition = function( x ) {
1634 |   // render position of cell with in slider
1635 |   var side = this.parent.originSide;
1636 |   this.element.style[ side ] = this.parent.getPositionValue( x );
1637 | };
1638 | 
1639 | /**
1640 |  * @param {Integer} factor - 0, 1, or -1
1641 | **/
1642 | Cell.prototype.wrapShift = function( shift ) {
1643 |   this.shift = shift;
1644 |   this.renderPosition( this.x + this.parent.slideableWidth * shift );
1645 | };
1646 | 
1647 | Cell.prototype.remove = function() {
1648 |   this.element.parentNode.removeChild( this.element );
1649 | };
1650 | 
1651 | return Cell;
1652 | 
1653 | }));
1654 | 
1655 | ( function( window, factory ) {
1656 |   
1657 |   // universal module definition
1658 | 
1659 |   if ( typeof define == 'function' && define.amd ) {
1660 |     // AMD
1661 |     define( 'flickity/js/animate',[
1662 |       'get-style-property/get-style-property',
1663 |       'fizzy-ui-utils/utils'
1664 |     ], function( getStyleProperty, utils ) {
1665 |       return factory( window, getStyleProperty, utils );
1666 |     });
1667 |   } else if ( typeof exports == 'object' ) {
1668 |     // CommonJS
1669 |     module.exports = factory(
1670 |       window,
1671 |       require('desandro-get-style-property'),
1672 |       require('fizzy-ui-utils')
1673 |     );
1674 |   } else {
1675 |     // browser global
1676 |     window.Flickity = window.Flickity || {};
1677 |     window.Flickity.animatePrototype = factory(
1678 |       window,
1679 |       window.getStyleProperty,
1680 |       window.fizzyUIUtils
1681 |     );
1682 |   }
1683 | 
1684 | }( window, function factory( window, getStyleProperty, utils ) {
1685 | 
1686 | 
1687 | 
1688 | // -------------------------- requestAnimationFrame -------------------------- //
1689 | 
1690 | // https://gist.github.com/1866474
1691 | 
1692 | var lastTime = 0;
1693 | var prefixes = 'webkit moz ms o'.split(' ');
1694 | // get unprefixed rAF and cAF, if present
1695 | var requestAnimationFrame = window.requestAnimationFrame;
1696 | var cancelAnimationFrame = window.cancelAnimationFrame;
1697 | // loop through vendor prefixes and get prefixed rAF and cAF
1698 | var prefix;
1699 | for( var i = 0; i < prefixes.length; i++ ) {
1700 |   if ( requestAnimationFrame && cancelAnimationFrame ) {
1701 |     break;
1702 |   }
1703 |   prefix = prefixes[i];
1704 |   requestAnimationFrame = requestAnimationFrame || window[ prefix + 'RequestAnimationFrame' ];
1705 |   cancelAnimationFrame  = cancelAnimationFrame  || window[ prefix + 'CancelAnimationFrame' ] ||
1706 |                             window[ prefix + 'CancelRequestAnimationFrame' ];
1707 | }
1708 | 
1709 | // fallback to setTimeout and clearTimeout if either request/cancel is not supported
1710 | if ( !requestAnimationFrame || !cancelAnimationFrame )  {
1711 |   requestAnimationFrame = function( callback ) {
1712 |     var currTime = new Date().getTime();
1713 |     var timeToCall = Math.max( 0, 16 - ( currTime - lastTime ) );
1714 |     var id = window.setTimeout( function() {
1715 |       callback( currTime + timeToCall );
1716 |     }, timeToCall );
1717 |     lastTime = currTime + timeToCall;
1718 |     return id;
1719 |   };
1720 | 
1721 |   cancelAnimationFrame = function( id ) {
1722 |     window.clearTimeout( id );
1723 |   };
1724 | }
1725 | 
1726 | // -------------------------- animate -------------------------- //
1727 | 
1728 | var proto = {};
1729 | 
1730 | proto.startAnimation = function() {
1731 |   if ( this.isAnimating ) {
1732 |     return;
1733 |   }
1734 | 
1735 |   this.isAnimating = true;
1736 |   this.restingFrames = 0;
1737 |   this.animate();
1738 | };
1739 | 
1740 | proto.animate = function() {
1741 |   this.applySelectedAttraction();
1742 | 
1743 |   var previousX = this.x;
1744 | 
1745 |   this.integratePhysics();
1746 |   this.positionSlider();
1747 |   this.settle( previousX );
1748 |   // animate next frame
1749 |   if ( this.isAnimating ) {
1750 |     var _this = this;
1751 |     requestAnimationFrame( function animateFrame() {
1752 |       _this.animate();
1753 |     });
1754 |   }
1755 | 
1756 |   /** /
1757 |   // log animation frame rate
1758 |   var now = new Date();
1759 |   if ( this.then ) {
1760 |     console.log( ~~( 1000 / (now-this.then)) + 'fps' )
1761 |   }
1762 |   this.then = now;
1763 |   /**/
1764 | };
1765 | 
1766 | 
1767 | var transformProperty = getStyleProperty('transform');
1768 | var is3d = !!getStyleProperty('perspective');
1769 | 
1770 | proto.positionSlider = function() {
1771 |   var x = this.x;
1772 |   // wrap position around
1773 |   if ( this.options.wrapAround && this.cells.length > 1 ) {
1774 |     x = utils.modulo( x, this.slideableWidth );
1775 |     x = x - this.slideableWidth;
1776 |     this.shiftWrapCells( x );
1777 |   }
1778 | 
1779 |   x = x + this.cursorPosition;
1780 | 
1781 |   // reverse if right-to-left and using transform
1782 |   x = this.options.rightToLeft && transformProperty ? -x : x;
1783 | 
1784 |   var value = this.getPositionValue( x );
1785 | 
1786 |   if ( transformProperty ) {
1787 |     // use 3D tranforms for hardware acceleration on iOS
1788 |     // but use 2D when settled, for better font-rendering
1789 |     this.slider.style[ transformProperty ] = is3d && this.isAnimating ?
1790 |       'translate3d(' + value + ',0,0)' : 'translateX(' + value + ')';
1791 |   } else {
1792 |     this.slider.style[ this.originSide ] = value;
1793 |   }
1794 | };
1795 | 
1796 | proto.positionSliderAtSelected = function() {
1797 |   if ( !this.cells.length ) {
1798 |     return;
1799 |   }
1800 |   var selectedCell = this.cells[ this.selectedIndex ];
1801 |   this.x = -selectedCell.target;
1802 |   this.positionSlider();
1803 | };
1804 | 
1805 | proto.getPositionValue = function( position ) {
1806 |   if ( this.options.percentPosition ) {
1807 |     // percent position, round to 2 digits, like 12.34%
1808 |     return ( Math.round( ( position / this.size.innerWidth ) * 10000 ) * 0.01 )+ '%';
1809 |   } else {
1810 |     // pixel positioning
1811 |     return Math.round( position ) + 'px';
1812 |   }
1813 | };
1814 | 
1815 | proto.settle = function( previousX ) {
1816 |   // keep track of frames where x hasn't moved
1817 |   if ( !this.isPointerDown && Math.round( this.x * 100 ) == Math.round( previousX * 100 ) ) {
1818 |     this.restingFrames++;
1819 |   }
1820 |   // stop animating if resting for 3 or more frames
1821 |   if ( this.restingFrames > 2 ) {
1822 |     this.isAnimating = false;
1823 |     delete this.isFreeScrolling;
1824 |     // render position with translateX when settled
1825 |     if ( is3d ) {
1826 |       this.positionSlider();
1827 |     }
1828 |     this.dispatchEvent('settle');
1829 |   }
1830 | };
1831 | 
1832 | proto.shiftWrapCells = function( x ) {
1833 |   // shift before cells
1834 |   var beforeGap = this.cursorPosition + x;
1835 |   this._shiftCells( this.beforeShiftCells, beforeGap, -1 );
1836 |   // shift after cells
1837 |   var afterGap = this.size.innerWidth - ( x + this.slideableWidth + this.cursorPosition );
1838 |   this._shiftCells( this.afterShiftCells, afterGap, 1 );
1839 | };
1840 | 
1841 | proto._shiftCells = function( cells, gap, shift ) {
1842 |   for ( var i=0, len = cells.length; i < len; i++ ) {
1843 |     var cell = cells[i];
1844 |     var cellShift = gap > 0 ? shift : 0;
1845 |     cell.wrapShift( cellShift );
1846 |     gap -= cell.size.outerWidth;
1847 |   }
1848 | };
1849 | 
1850 | proto._unshiftCells = function( cells ) {
1851 |   if ( !cells || !cells.length ) {
1852 |     return;
1853 |   }
1854 |   for ( var i=0, len = cells.length; i < len; i++ ) {
1855 |     cells[i].wrapShift( 0 );
1856 |   }
1857 | };
1858 | 
1859 | // -------------------------- physics -------------------------- //
1860 | 
1861 | proto.integratePhysics = function() {
1862 |   this.velocity += this.accel;
1863 |   this.x += this.velocity;
1864 |   this.velocity *= this.getFrictionFactor();
1865 |   // reset acceleration
1866 |   this.accel = 0;
1867 | };
1868 | 
1869 | proto.applyForce = function( force ) {
1870 |   this.accel += force;
1871 | };
1872 | 
1873 | proto.getFrictionFactor = function() {
1874 |   return 1 - this.options[ this.isFreeScrolling ? 'freeScrollFriction' : 'friction' ];
1875 | };
1876 | 
1877 | 
1878 | proto.getRestingPosition = function() {
1879 |   // my thanks to Steven Wittens, who simplified this math greatly
1880 |   return this.x + this.velocity / ( 1 - this.getFrictionFactor() );
1881 | };
1882 | 
1883 | 
1884 | proto.applySelectedAttraction = function() {
1885 |   // do not attract if pointer down or no cells
1886 |   var len = this.cells.length;
1887 |   if ( this.isPointerDown || this.isFreeScrolling || !len ) {
1888 |     return;
1889 |   }
1890 |   var cell = this.cells[ this.selectedIndex ];
1891 |   var wrap = this.options.wrapAround && len > 1 ?
1892 |     this.slideableWidth * Math.floor( this.selectedIndex / len ) : 0;
1893 |   var distance = ( cell.target + wrap ) * -1 - this.x;
1894 |   var force = distance * this.options.selectedAttraction;
1895 |   this.applyForce( force );
1896 | };
1897 | 
1898 | return proto;
1899 | 
1900 | }));
1901 | 
1902 | /*!
1903 |  * Flickity v1.0.2
1904 |  * Touch, responsive, flickable galleries
1905 |  *
1906 |  * Licensed GPLv3 for open source use
1907 |  * or Flickity Commercial License for commercial use
1908 |  *
1909 |  * http://flickity.metafizzy.co
1910 |  * Copyright 2015 Metafizzy
1911 |  */
1912 | 
1913 | ( function( window, factory ) {
1914 |   
1915 |   // universal module definition
1916 | 
1917 |   if ( typeof define == 'function' && define.amd ) {
1918 |     // AMD
1919 |     define( 'flickity/js/flickity',[
1920 |       'classie/classie',
1921 |       'eventEmitter/EventEmitter',
1922 |       'eventie/eventie',
1923 |       'get-size/get-size',
1924 |       'fizzy-ui-utils/utils',
1925 |       './cell',
1926 |       './animate'
1927 |     ], function( classie, EventEmitter, eventie, getSize, utils, Cell, animatePrototype ) {
1928 |       return factory( window, classie, EventEmitter, eventie, getSize, utils, Cell, animatePrototype );
1929 |     });
1930 |   } else if ( typeof exports == 'object' ) {
1931 |     // CommonJS
1932 |     module.exports = factory(
1933 |       window,
1934 |       require('desandro-classie'),
1935 |       require('wolfy87-eventemitter'),
1936 |       require('eventie'),
1937 |       require('get-size'),
1938 |       require('fizzy-ui-utils'),
1939 |       require('./cell'),
1940 |       require('./animate')
1941 |     );
1942 |   } else {
1943 |     // browser global
1944 |     var _Flickity = window.Flickity;
1945 | 
1946 |     window.Flickity = factory(
1947 |       window,
1948 |       window.classie,
1949 |       window.EventEmitter,
1950 |       window.eventie,
1951 |       window.getSize,
1952 |       window.fizzyUIUtils,
1953 |       _Flickity.Cell,
1954 |       _Flickity.animatePrototype
1955 |     );
1956 |   }
1957 | 
1958 | }( window, function factory( window, classie, EventEmitter, eventie, getSize,
1959 |   utils, Cell, animatePrototype ) {
1960 | 
1961 | 
1962 | 
1963 | // vars
1964 | var jQuery = window.jQuery;
1965 | var getComputedStyle = window.getComputedStyle;
1966 | var console = window.console;
1967 | 
1968 | function moveElements( elems, toElem ) {
1969 |   elems = utils.makeArray( elems );
1970 |   while ( elems.length ) {
1971 |     toElem.appendChild( elems.shift() );
1972 |   }
1973 | }
1974 | 
1975 | // -------------------------- Flickity -------------------------- //
1976 | 
1977 | // globally unique identifiers
1978 | var GUID = 0;
1979 | // internal store of all Flickity intances
1980 | var instances = {};
1981 | 
1982 | function Flickity( element, options ) {
1983 |   var queryElement = utils.getQueryElement( element );
1984 |   if ( !queryElement ) {
1985 |     if ( console ) {
1986 |       console.error( 'Bad element for Flickity: ' + ( queryElement || element ) );
1987 |     }
1988 |     return;
1989 |   }
1990 |   this.element = queryElement;
1991 |   // add jQuery
1992 |   if ( jQuery ) {
1993 |     this.$element = jQuery( this.element );
1994 |   }
1995 |   // options
1996 |   this.options = utils.extend( {}, this.constructor.defaults );
1997 |   this.option( options );
1998 | 
1999 |   // kick things off
2000 |   this._create();
2001 | }
2002 | 
2003 | Flickity.defaults = {
2004 |   accessibility: true,
2005 |   cellAlign: 'center',
2006 |   // cellSelector: undefined,
2007 |   // contain: false,
2008 |   freeScrollFriction: 0.075, // friction when free-scrolling
2009 |   friction: 0.28, // friction when selecting
2010 |   // initialIndex: 0,
2011 |   percentPosition: true,
2012 |   resize: true,
2013 |   selectedAttraction: 0.025,
2014 |   setGallerySize: true
2015 |   // watchCSS: false,
2016 |   // wrapAround: false
2017 | };
2018 | 
2019 | // hash of methods triggered on _create()
2020 | Flickity.createMethods = [];
2021 | 
2022 | // inherit EventEmitter
2023 | utils.extend( Flickity.prototype, EventEmitter.prototype );
2024 | 
2025 | Flickity.prototype._create = function() {
2026 |   // add id for Flickity.data
2027 |   var id = this.guid = ++GUID;
2028 |   this.element.flickityGUID = id; // expando
2029 |   instances[ id ] = this; // associate via id
2030 |   // initial properties
2031 |   this.selectedIndex = this.options.initialIndex || 0;
2032 |   // how many frames slider has been in same position
2033 |   this.restingFrames = 0;
2034 |   // initial physics properties
2035 |   this.x = 0;
2036 |   this.velocity = 0;
2037 |   this.accel = 0;
2038 |   this.originSide = this.options.rightToLeft ? 'right' : 'left';
2039 |   // create viewport & slider
2040 |   this.viewport = document.createElement('div');
2041 |   this.viewport.className = 'flickity-viewport';
2042 |   Flickity.setUnselectable( this.viewport );
2043 |   this._createSlider();
2044 | 
2045 |   if ( this.options.resize || this.options.watchCSS ) {
2046 |     eventie.bind( window, 'resize', this );
2047 |     this.isResizeBound = true;
2048 |   }
2049 | 
2050 |   for ( var i=0, len = Flickity.createMethods.length; i < len; i++ ) {
2051 |     var method = Flickity.createMethods[i];
2052 |     this[ method ]();
2053 |   }
2054 | 
2055 |   if ( this.options.watchCSS ) {
2056 |     this.watchCSS();
2057 |   } else {
2058 |     this.activate();
2059 |   }
2060 | 
2061 | };
2062 | 
2063 | /**
2064 |  * set options
2065 |  * @param {Object} opts
2066 |  */
2067 | Flickity.prototype.option = function( opts ) {
2068 |   utils.extend( this.options, opts );
2069 | };
2070 | 
2071 | Flickity.prototype.activate = function() {
2072 |   if ( this.isActive ) {
2073 |     return;
2074 |   }
2075 |   this.isActive = true;
2076 |   classie.add( this.element, 'flickity-enabled' );
2077 |   if ( this.options.rightToLeft ) {
2078 |     classie.add( this.element, 'flickity-rtl' );
2079 |   }
2080 | 
2081 |   // move initial cell elements so they can be loaded as cells
2082 |   var cellElems = this._filterFindCellElements( this.element.children );
2083 |   moveElements( cellElems, this.slider );
2084 |   this.viewport.appendChild( this.slider );
2085 |   this.element.appendChild( this.viewport );
2086 | 
2087 |   this.getSize();
2088 |   // get cells from children
2089 |   this.reloadCells();
2090 | 
2091 |   if ( this.options.accessibility ) {
2092 |     // allow element to focusable
2093 |     this.element.tabIndex = 0;
2094 |     // listen for key presses
2095 |     eventie.bind( this.element, 'keydown', this );
2096 |   }
2097 | 
2098 |   this.emit('activate');
2099 | 
2100 |   this.positionSliderAtSelected();
2101 |   this.select( this.selectedIndex );
2102 | };
2103 | 
2104 | // slider positions the cells
2105 | Flickity.prototype._createSlider = function() {
2106 |   // slider element does all the positioning
2107 |   var slider = document.createElement('div');
2108 |   slider.className = 'flickity-slider';
2109 |   slider.style[ this.originSide ] = 0;
2110 |   this.slider = slider;
2111 | };
2112 | 
2113 | Flickity.prototype._filterFindCellElements = function( elems ) {
2114 |   return utils.filterFindElements( elems, this.options.cellSelector );
2115 | };
2116 | 
2117 | // goes through all children
2118 | Flickity.prototype.reloadCells = function() {
2119 |   // collection of item elements
2120 |   this.cells = this._makeCells( this.slider.children );
2121 |   this.positionCells();
2122 |   this._getWrapShiftCells();
2123 |   this.setGallerySize();
2124 | };
2125 | 
2126 | /**
2127 |  * turn elements into Flickity.Cells
2128 |  * @param {Array or NodeList or HTMLElement} elems
2129 |  * @returns {Array} items - collection of new Flickity Cells
2130 |  */
2131 | Flickity.prototype._makeCells = function( elems ) {
2132 |   var cellElems = this._filterFindCellElements( elems );
2133 | 
2134 |   // create new Flickity for collection
2135 |   var cells = [];
2136 |   for ( var i=0, len = cellElems.length; i < len; i++ ) {
2137 |     var elem = cellElems[i];
2138 |     var cell = new Cell( elem, this );
2139 |     cells.push( cell );
2140 |   }
2141 | 
2142 |   return cells;
2143 | };
2144 | 
2145 | Flickity.prototype.getLastCell = function() {
2146 |   return this.cells[ this.cells.length - 1 ];
2147 | };
2148 | 
2149 | // positions all cells
2150 | Flickity.prototype.positionCells = function() {
2151 |   // size all cells
2152 |   this._sizeCells( this.cells );
2153 |   // position all cells
2154 |   this._positionCells( 0 );
2155 | };
2156 | 
2157 | /**
2158 |  * position certain cells
2159 |  * @param {Integer} index - which cell to start with
2160 |  */
2161 | Flickity.prototype._positionCells = function( index ) {
2162 |   // also measure maxCellHeight
2163 |   // start 0 if positioning all cells
2164 |   this.maxCellHeight = index ? this.maxCellHeight || 0 : 0;
2165 |   var cellX = 0;
2166 |   // get cellX
2167 |   if ( index > 0 ) {
2168 |     var startCell = this.cells[ index - 1 ];
2169 |     cellX = startCell.x + startCell.size.outerWidth;
2170 |   }
2171 |   var cell;
2172 |   for ( var len = this.cells.length, i=index; i < len; i++ ) {
2173 |     cell = this.cells[i];
2174 |     cell.setPosition( cellX );
2175 |     cellX += cell.size.outerWidth;
2176 |     this.maxCellHeight = Math.max( cell.size.outerHeight, this.maxCellHeight );
2177 |   }
2178 |   // keep track of cellX for wrap-around
2179 |   this.slideableWidth = cellX;
2180 |   // contain cell target
2181 |   this._containCells();
2182 | };
2183 | 
2184 | /**
2185 |  * cell.getSize() on multiple cells
2186 |  * @param {Array} cells
2187 |  */
2188 | Flickity.prototype._sizeCells = function( cells ) {
2189 |   for ( var i=0, len = cells.length; i < len; i++ ) {
2190 |     var cell = cells[i];
2191 |     cell.getSize();
2192 |   }
2193 | };
2194 | 
2195 | // alias _init for jQuery plugin .flickity()
2196 | Flickity.prototype._init =
2197 | Flickity.prototype.reposition = function() {
2198 |   this.positionCells();
2199 |   this.positionSliderAtSelected();
2200 | };
2201 | 
2202 | Flickity.prototype.getSize = function() {
2203 |   this.size = getSize( this.element );
2204 |   this.setCellAlign();
2205 |   this.cursorPosition = this.size.innerWidth * this.cellAlign;
2206 | };
2207 | 
2208 | var cellAlignShorthands = {
2209 |   // cell align, then based on origin side
2210 |   center: {
2211 |     left: 0.5,
2212 |     right: 0.5
2213 |   },
2214 |   left: {
2215 |     left: 0,
2216 |     right: 1
2217 |   },
2218 |   right: {
2219 |     right: 0,
2220 |     left: 1
2221 |   }
2222 | };
2223 | 
2224 | Flickity.prototype.setCellAlign = function() {
2225 |   var shorthand = cellAlignShorthands[ this.options.cellAlign ];
2226 |   this.cellAlign = shorthand ? shorthand[ this.originSide ] : this.options.cellAlign;
2227 | };
2228 | 
2229 | Flickity.prototype.setGallerySize = function() {
2230 |   if ( this.options.setGallerySize ) {
2231 |     this.viewport.style.height = this.maxCellHeight + 'px';
2232 |   }
2233 | };
2234 | 
2235 | Flickity.prototype._getWrapShiftCells = function() {
2236 |   // only for wrap-around
2237 |   if ( !this.options.wrapAround ) {
2238 |     return;
2239 |   }
2240 |   // unshift previous cells
2241 |   this._unshiftCells( this.beforeShiftCells );
2242 |   this._unshiftCells( this.afterShiftCells );
2243 |   // get before cells
2244 |   // initial gap
2245 |   var gapX = this.cursorPosition;
2246 |   var cellIndex = this.cells.length - 1;
2247 |   this.beforeShiftCells = this._getGapCells( gapX, cellIndex, -1 );
2248 |   // get after cells
2249 |   // ending gap between last cell and end of gallery viewport
2250 |   gapX = this.size.innerWidth - this.cursorPosition;
2251 |   // start cloning at first cell, working forwards
2252 |   this.afterShiftCells = this._getGapCells( gapX, 0, 1 );
2253 | };
2254 | 
2255 | Flickity.prototype._getGapCells = function( gapX, cellIndex, increment ) {
2256 |   // keep adding cells until the cover the initial gap
2257 |   var cells = [];
2258 |   while ( gapX > 0 ) {
2259 |     var cell = this.cells[ cellIndex ];
2260 |     if ( !cell ) {
2261 |       break;
2262 |     }
2263 |     cells.push( cell );
2264 |     cellIndex += increment;
2265 |     gapX -= cell.size.outerWidth;
2266 |   }
2267 |   return cells;
2268 | };
2269 | 
2270 | // ----- contain ----- //
2271 | 
2272 | // contain cell targets so no excess sliding
2273 | Flickity.prototype._containCells = function() {
2274 |   if ( !this.options.contain || this.options.wrapAround || !this.cells.length ) {
2275 |     return;
2276 |   }
2277 |   var startMargin = this.options.rightToLeft ? 'marginRight' : 'marginLeft';
2278 |   var endMargin = this.options.rightToLeft ? 'marginLeft' : 'marginRight';
2279 |   var firstCellStartMargin = this.cells[0].size[ startMargin ];
2280 |   var lastCell = this.getLastCell();
2281 |   var contentWidth = this.slideableWidth - lastCell.size[ endMargin ];
2282 |   var endLimit = contentWidth - this.size.innerWidth * ( 1 - this.cellAlign );
2283 |   // content is less than gallery size
2284 |   var isContentSmaller = contentWidth < this.size.innerWidth;
2285 |   // contain each cell target
2286 |   for ( var i=0, len = this.cells.length; i < len; i++ ) {
2287 |     var cell = this.cells[i];
2288 |     // reset default target
2289 |     cell.setDefaultTarget();
2290 |     if ( isContentSmaller ) {
2291 |       // all cells fit inside gallery
2292 |       cell.target = contentWidth * this.cellAlign;
2293 |     } else {
2294 |       // contain to bounds
2295 |       cell.target = Math.max( cell.target, this.cursorPosition + firstCellStartMargin );
2296 |       cell.target = Math.min( cell.target, endLimit );
2297 |     }
2298 |   }
2299 | };
2300 | 
2301 | // -----  ----- //
2302 | 
2303 | /**
2304 |  * emits events via eventEmitter and jQuery events
2305 |  * @param {String} type - name of event
2306 |  * @param {Event} event - original event
2307 |  * @param {Array} args - extra arguments
2308 |  */
2309 | Flickity.prototype.dispatchEvent = function( type, event, args ) {
2310 |   var emitArgs = [ event ].concat( args );
2311 |   this.emitEvent( type, emitArgs );
2312 | 
2313 |   if ( jQuery && this.$element ) {
2314 |     if ( event ) {
2315 |       // create jQuery event
2316 |       var $event = jQuery.Event( event );
2317 |       $event.type = type;
2318 |       this.$element.trigger( $event, args );
2319 |     } else {
2320 |       // just trigger with type if no event available
2321 |       this.$element.trigger( type, args );
2322 |     }
2323 |   }
2324 | };
2325 | 
2326 | // -------------------------- select -------------------------- //
2327 | 
2328 | /**
2329 |  * @param {Integer} index - index of the cell
2330 |  * @param {Boolean} isWrap - will wrap-around to last/first if at the end
2331 |  */
2332 | Flickity.prototype.select = function( index, isWrap ) {
2333 |   if ( !this.isActive ) {
2334 |     return;
2335 |   }
2336 |   // wrap position so slider is within normal area
2337 |   var len = this.cells.length;
2338 |   if ( this.options.wrapAround && len > 1 ) {
2339 |     if ( index < 0 ) {
2340 |       this.x -= this.slideableWidth;
2341 |     } else if ( index >= len ) {
2342 |       this.x += this.slideableWidth;
2343 |     }
2344 |   }
2345 | 
2346 |   if ( this.options.wrapAround || isWrap ) {
2347 |     index = utils.modulo( index, len );
2348 |   }
2349 | 
2350 |   if ( this.cells[ index ] ) {
2351 |     this.selectedIndex = index;
2352 |     this.setSelectedCell();
2353 |     this.startAnimation();
2354 |     this.dispatchEvent('cellSelect');
2355 |   }
2356 | };
2357 | 
2358 | Flickity.prototype.previous = function( isWrap ) {
2359 |   this.select( this.selectedIndex - 1, isWrap );
2360 | };
2361 | 
2362 | Flickity.prototype.next = function( isWrap ) {
2363 |   this.select( this.selectedIndex + 1, isWrap );
2364 | };
2365 | 
2366 | Flickity.prototype.setSelectedCell = function() {
2367 |   this._removeSelectedCellClass();
2368 |   this.selectedCell = this.cells[ this.selectedIndex ];
2369 |   this.selectedElement = this.selectedCell.element;
2370 |   classie.add( this.selectedElement, 'is-selected' );
2371 | };
2372 | 
2373 | Flickity.prototype._removeSelectedCellClass = function() {
2374 |   if ( this.selectedCell ) {
2375 |     classie.remove( this.selectedCell.element, 'is-selected' );
2376 |   }
2377 | };
2378 | 
2379 | // -------------------------- get cells -------------------------- //
2380 | 
2381 | /**
2382 |  * get Flickity.Cell, given an Element
2383 |  * @param {Element} elem
2384 |  * @returns {Flickity.Cell} item
2385 |  */
2386 | Flickity.prototype.getCell = function( elem ) {
2387 |   // loop through cells to get the one that matches
2388 |   for ( var i=0, len = this.cells.length; i < len; i++ ) {
2389 |     var cell = this.cells[i];
2390 |     if ( cell.element == elem ) {
2391 |       return cell;
2392 |     }
2393 |   }
2394 | };
2395 | 
2396 | /**
2397 |  * get collection of Flickity.Cells, given Elements
2398 |  * @param {Element, Array, NodeList} elems
2399 |  * @returns {Array} cells - Flickity.Cells
2400 |  */
2401 | Flickity.prototype.getCells = function( elems ) {
2402 |   elems = utils.makeArray( elems );
2403 |   var cells = [];
2404 |   for ( var i=0, len = elems.length; i < len; i++ ) {
2405 |     var elem = elems[i];
2406 |     var cell = this.getCell( elem );
2407 |     if ( cell ) {
2408 |       cells.push( cell );
2409 |     }
2410 |   }
2411 |   return cells;
2412 | };
2413 | 
2414 | /**
2415 |  * get cell elements
2416 |  * @returns {Array} cellElems
2417 |  */
2418 | Flickity.prototype.getCellElements = function() {
2419 |   var cellElems = [];
2420 |   for ( var i=0, len = this.cells.length; i < len; i++ ) {
2421 |     cellElems.push( this.cells[i].element );
2422 |   }
2423 |   return cellElems;
2424 | };
2425 | 
2426 | /**
2427 |  * get parent cell from an element
2428 |  * @param {Element} elem
2429 |  * @returns {Flickit.Cell} cell
2430 |  */
2431 | Flickity.prototype.getParentCell = function( elem ) {
2432 |   // first check if elem is cell
2433 |   var cell = this.getCell( elem );
2434 |   if ( cell ) {
2435 |     return cell;
2436 |   }
2437 |   // try to get parent cell elem
2438 |   elem = utils.getParent( elem, '.flickity-slider > *' );
2439 |   return this.getCell( elem );
2440 | };
2441 | 
2442 | // -------------------------- events -------------------------- //
2443 | 
2444 | Flickity.prototype.uiChange = function() {
2445 |   this.emit('uiChange');
2446 | };
2447 | 
2448 | Flickity.prototype.childUIPointerDown = function( event ) {
2449 |   this.emitEvent( 'childUIPointerDown', [ event ] );
2450 | };
2451 | 
2452 | // ----- resize ----- //
2453 | 
2454 | Flickity.prototype.onresize = function() {
2455 |   this.watchCSS();
2456 |   this.resize();
2457 | };
2458 | 
2459 | utils.debounceMethod( Flickity, 'onresize', 150 );
2460 | 
2461 | Flickity.prototype.resize = function() {
2462 |   if ( !this.isActive ) {
2463 |     return;
2464 |   }
2465 |   this.getSize();
2466 |   // wrap values
2467 |   if ( this.options.wrapAround ) {
2468 |     this.x = utils.modulo( this.x, this.slideableWidth );
2469 |   }
2470 |   this.positionCells();
2471 |   this._getWrapShiftCells();
2472 |   this.setGallerySize();
2473 |   this.positionSliderAtSelected();
2474 | };
2475 | 
2476 | var supportsConditionalCSS = Flickity.supportsConditionalCSS = ( function() {
2477 |   var supports;
2478 |   return function checkSupport() {
2479 |     if ( supports !== undefined ) {
2480 |       return supports;
2481 |     }
2482 |     if ( !getComputedStyle ) {
2483 |       supports = false;
2484 |       return;
2485 |     }
2486 |     // style body's :after and check that
2487 |     var style = document.createElement('style');
2488 |     var cssText = document.createTextNode('body:after { content: "foo"; display: none; }');
2489 |     style.appendChild( cssText );
2490 |     document.head.appendChild( style );
2491 |     var afterContent = getComputedStyle( document.body, ':after' ).content;
2492 |     // check if able to get :after content
2493 |     supports = afterContent.indexOf('foo') != -1;
2494 |     document.head.removeChild( style );
2495 |     return supports;
2496 |   };
2497 | })();
2498 | 
2499 | // watches the :after property, activates/deactivates
2500 | Flickity.prototype.watchCSS = function() {
2501 |   var watchOption = this.options.watchCSS;
2502 |   if ( !watchOption ) {
2503 |     return;
2504 |   }
2505 |   var supports = supportsConditionalCSS();
2506 |   if ( !supports ) {
2507 |     // activate if watch option is fallbackOn
2508 |     var method = watchOption == 'fallbackOn' ? 'activate' : 'deactivate';
2509 |     this[ method ]();
2510 |     return;
2511 |   }
2512 | 
2513 |   var afterContent = getComputedStyle( this.element, ':after' ).content;
2514 |   // activate if :after { content: 'flickity' }
2515 |   if ( afterContent.indexOf('flickity') != -1 ) {
2516 |     this.activate();
2517 |   } else {
2518 |     this.deactivate();
2519 |   }
2520 | };
2521 | 
2522 | // ----- keydown ----- //
2523 | 
2524 | // go previous/next if left/right keys pressed
2525 | Flickity.prototype.onkeydown = function( event ) {
2526 |   // only work if element is in focus
2527 |   if ( !this.options.accessibility ||
2528 |     ( document.activeElement && document.activeElement != this.element ) ) {
2529 |     return;
2530 |   }
2531 | 
2532 |   if ( event.keyCode == 37 ) {
2533 |     // go left
2534 |     var leftMethod = this.options.rightToLeft ? 'next' : 'previous';
2535 |     this.uiChange();
2536 |     this[ leftMethod ]();
2537 |   } else if ( event.keyCode == 39 ) {
2538 |     // go right
2539 |     var rightMethod = this.options.rightToLeft ? 'previous' : 'next';
2540 |     this.uiChange();
2541 |     this[ rightMethod ]();
2542 |   }
2543 | };
2544 | 
2545 | // -------------------------- destroy -------------------------- //
2546 | 
2547 | // deactivate all Flickity functionality, but keep stuff available
2548 | Flickity.prototype.deactivate = function() {
2549 |   if ( !this.isActive ) {
2550 |     return;
2551 |   }
2552 |   classie.remove( this.element, 'flickity-enabled' );
2553 |   classie.remove( this.element, 'flickity-rtl' );
2554 |   // destroy cells
2555 |   for ( var i=0, len = this.cells.length; i < len; i++ ) {
2556 |     var cell = this.cells[i];
2557 |     cell.destroy();
2558 |   }
2559 |   this._removeSelectedCellClass();
2560 |   this.element.removeChild( this.viewport );
2561 |   // move child elements back into element
2562 |   moveElements( this.slider.children, this.element );
2563 |   if ( this.options.accessibility ) {
2564 |     this.element.removeAttribute('tabIndex');
2565 |     eventie.unbind( this.element, 'keydown', this );
2566 |   }
2567 |   // set flags
2568 |   this.isActive = false;
2569 |   this.emit('deactivate');
2570 | };
2571 | 
2572 | Flickity.prototype.destroy = function() {
2573 |   this.deactivate();
2574 |   if ( this.isResizeBound ) {
2575 |     eventie.unbind( window, 'resize', this );
2576 |   }
2577 |   this.emit('destroy');
2578 |   if ( jQuery && this.$element ) {
2579 |     jQuery.removeData( this.element, 'flickity' );
2580 |   }
2581 |   delete this.element.flickityGUID;
2582 |   delete instances[ this.guid ];
2583 | };
2584 | 
2585 | // -------------------------- prototype -------------------------- //
2586 | 
2587 | utils.extend( Flickity.prototype, animatePrototype );
2588 | 
2589 | // -------------------------- extras -------------------------- //
2590 | 
2591 | // quick check for IE8
2592 | var isIE8 = 'attachEvent' in window;
2593 | 
2594 | Flickity.setUnselectable = function( elem ) {
2595 |   if ( !isIE8 ) {
2596 |     return;
2597 |   }
2598 |   // IE8 prevent child from changing focus http://stackoverflow.com/a/17525223/182183
2599 |   elem.setAttribute( 'unselectable', 'on' );
2600 | };
2601 | 
2602 | /**
2603 |  * get Flickity instance from element
2604 |  * @param {Element} elem
2605 |  * @returns {Flickity}
2606 |  */
2607 | Flickity.data = function( elem ) {
2608 |   elem = utils.getQueryElement( elem );
2609 |   var id = elem && elem.flickityGUID;
2610 |   return id && instances[ id ];
2611 | };
2612 | 
2613 | utils.htmlInit( Flickity, 'flickity' );
2614 | 
2615 | if ( jQuery && jQuery.bridget ) {
2616 |   jQuery.bridget( 'flickity', Flickity );
2617 | }
2618 | 
2619 | Flickity.Cell = Cell;
2620 | 
2621 | return Flickity;
2622 | 
2623 | }));
2624 | 
2625 | /*!
2626 |  * Unipointer v1.1.0
2627 |  * base class for doing one thing with pointer event
2628 |  * MIT license
2629 |  */
2630 | 
2631 | /*jshint browser: true, undef: true, unused: true, strict: true */
2632 | /*global define: false, module: false, require: false */
2633 | 
2634 | ( function( window, factory ) {
2635 |   
2636 |   // universal module definition
2637 | 
2638 |   if ( typeof define == 'function' && define.amd ) {
2639 |     // AMD
2640 |     define( 'unipointer/unipointer',[
2641 |       'eventEmitter/EventEmitter',
2642 |       'eventie/eventie'
2643 |     ], function( EventEmitter, eventie ) {
2644 |       return factory( window, EventEmitter, eventie );
2645 |     });
2646 |   } else if ( typeof exports == 'object' ) {
2647 |     // CommonJS
2648 |     module.exports = factory(
2649 |       window,
2650 |       require('wolfy87-eventemitter'),
2651 |       require('eventie')
2652 |     );
2653 |   } else {
2654 |     // browser global
2655 |     window.Unipointer = factory(
2656 |       window,
2657 |       window.EventEmitter,
2658 |       window.eventie
2659 |     );
2660 |   }
2661 | 
2662 | }( window, function factory( window, EventEmitter, eventie ) {
2663 | 
2664 | 
2665 | 
2666 | function noop() {}
2667 | 
2668 | function Unipointer() {}
2669 | 
2670 | // inherit EventEmitter
2671 | Unipointer.prototype = new EventEmitter();
2672 | 
2673 | Unipointer.prototype.bindStartEvent = function( elem ) {
2674 |   this._bindStartEvent( elem, true );
2675 | };
2676 | 
2677 | Unipointer.prototype.unbindStartEvent = function( elem ) {
2678 |   this._bindStartEvent( elem, false );
2679 | };
2680 | 
2681 | /**
2682 |  * works as unbinder, as you can ._bindStart( false ) to unbind
2683 |  * @param {Boolean} isBind - will unbind if falsey
2684 |  */
2685 | Unipointer.prototype._bindStartEvent = function( elem, isBind ) {
2686 |   // munge isBind, default to true
2687 |   isBind = isBind === undefined ? true : !!isBind;
2688 |   var bindMethod = isBind ? 'bind' : 'unbind';
2689 | 
2690 |   if ( window.navigator.pointerEnabled ) {
2691 |     // W3C Pointer Events, IE11. See https://coderwall.com/p/mfreca
2692 |     eventie[ bindMethod ]( elem, 'pointerdown', this );
2693 |   } else if ( window.navigator.msPointerEnabled ) {
2694 |     // IE10 Pointer Events
2695 |     eventie[ bindMethod ]( elem, 'MSPointerDown', this );
2696 |   } else {
2697 |     // listen for both, for devices like Chrome Pixel
2698 |     eventie[ bindMethod ]( elem, 'mousedown', this );
2699 |     eventie[ bindMethod ]( elem, 'touchstart', this );
2700 |   }
2701 | };
2702 | 
2703 | // trigger handler methods for events
2704 | Unipointer.prototype.handleEvent = function( event ) {
2705 |   var method = 'on' + event.type;
2706 |   if ( this[ method ] ) {
2707 |     this[ method ]( event );
2708 |   }
2709 | };
2710 | 
2711 | // returns the touch that we're keeping track of
2712 | Unipointer.prototype.getTouch = function( touches ) {
2713 |   for ( var i=0, len = touches.length; i < len; i++ ) {
2714 |     var touch = touches[i];
2715 |     if ( touch.identifier == this.pointerIdentifier ) {
2716 |       return touch;
2717 |     }
2718 |   }
2719 | };
2720 | 
2721 | // ----- start event ----- //
2722 | 
2723 | Unipointer.prototype.onmousedown = function( event ) {
2724 |   // dismiss clicks from right or middle buttons
2725 |   var button = event.button;
2726 |   if ( button && ( button !== 0 && button !== 1 ) ) {
2727 |     return;
2728 |   }
2729 |   this._pointerDown( event, event );
2730 | };
2731 | 
2732 | Unipointer.prototype.ontouchstart = function( event ) {
2733 |   this._pointerDown( event, event.changedTouches[0] );
2734 | };
2735 | 
2736 | Unipointer.prototype.onMSPointerDown =
2737 | Unipointer.prototype.onpointerdown = function( event ) {
2738 |   this._pointerDown( event, event );
2739 | };
2740 | 
2741 | /**
2742 |  * pointer start
2743 |  * @param {Event} event
2744 |  * @param {Event or Touch} pointer
2745 |  */
2746 | Unipointer.prototype._pointerDown = function( event, pointer ) {
2747 |   // dismiss other pointers
2748 |   if ( this.isPointerDown ) {
2749 |     return;
2750 |   }
2751 | 
2752 |   this.isPointerDown = true;
2753 |   // save pointer identifier to match up touch events
2754 |   this.pointerIdentifier = pointer.pointerId !== undefined ?
2755 |     // pointerId for pointer events, touch.indentifier for touch events
2756 |     pointer.pointerId : pointer.identifier;
2757 | 
2758 |   this.pointerDown( event, pointer );
2759 | };
2760 | 
2761 | Unipointer.prototype.pointerDown = function( event, pointer ) {
2762 |   this._bindPostStartEvents( event );
2763 |   this.emitEvent( 'pointerDown', [ event, pointer ] );
2764 | };
2765 | 
2766 | // hash of events to be bound after start event
2767 | var postStartEvents = {
2768 |   mousedown: [ 'mousemove', 'mouseup' ],
2769 |   touchstart: [ 'touchmove', 'touchend', 'touchcancel' ],
2770 |   pointerdown: [ 'pointermove', 'pointerup', 'pointercancel' ],
2771 |   MSPointerDown: [ 'MSPointerMove', 'MSPointerUp', 'MSPointerCancel' ]
2772 | };
2773 | 
2774 | Unipointer.prototype._bindPostStartEvents = function( event ) {
2775 |   if ( !event ) {
2776 |     return;
2777 |   }
2778 |   // get proper events to match start event
2779 |   var events = postStartEvents[ event.type ];
2780 |   // IE8 needs to be bound to document
2781 |   var node = event.preventDefault ? window : document;
2782 |   // bind events to node
2783 |   for ( var i=0, len = events.length; i < len; i++ ) {
2784 |     var evnt = events[i];
2785 |     eventie.bind( node, evnt, this );
2786 |   }
2787 |   // save these arguments
2788 |   this._boundPointerEvents = {
2789 |     events: events,
2790 |     node: node
2791 |   };
2792 | };
2793 | 
2794 | Unipointer.prototype._unbindPostStartEvents = function() {
2795 |   var args = this._boundPointerEvents;
2796 |   // IE8 can trigger dragEnd twice, check for _boundEvents
2797 |   if ( !args || !args.events ) {
2798 |     return;
2799 |   }
2800 | 
2801 |   for ( var i=0, len = args.events.length; i < len; i++ ) {
2802 |     var event = args.events[i];
2803 |     eventie.unbind( args.node, event, this );
2804 |   }
2805 |   delete this._boundPointerEvents;
2806 | };
2807 | 
2808 | // ----- move event ----- //
2809 | 
2810 | Unipointer.prototype.onmousemove = function( event ) {
2811 |   this._pointerMove( event, event );
2812 | };
2813 | 
2814 | Unipointer.prototype.onMSPointerMove =
2815 | Unipointer.prototype.onpointermove = function( event ) {
2816 |   if ( event.pointerId == this.pointerIdentifier ) {
2817 |     this._pointerMove( event, event );
2818 |   }
2819 | };
2820 | 
2821 | Unipointer.prototype.ontouchmove = function( event ) {
2822 |   var touch = this.getTouch( event.changedTouches );
2823 |   if ( touch ) {
2824 |     this._pointerMove( event, touch );
2825 |   }
2826 | };
2827 | 
2828 | /**
2829 |  * pointer move
2830 |  * @param {Event} event
2831 |  * @param {Event or Touch} pointer
2832 |  * @private
2833 |  */
2834 | Unipointer.prototype._pointerMove = function( event, pointer ) {
2835 |   this.pointerMove( event, pointer );
2836 | };
2837 | 
2838 | // public
2839 | Unipointer.prototype.pointerMove = function( event, pointer ) {
2840 |   this.emitEvent( 'pointerMove', [ event, pointer ] );
2841 | };
2842 | 
2843 | // ----- end event ----- //
2844 | 
2845 | 
2846 | Unipointer.prototype.onmouseup = function( event ) {
2847 |   this._pointerUp( event, event );
2848 | };
2849 | 
2850 | Unipointer.prototype.onMSPointerUp =
2851 | Unipointer.prototype.onpointerup = function( event ) {
2852 |   if ( event.pointerId == this.pointerIdentifier ) {
2853 |     this._pointerUp( event, event );
2854 |   }
2855 | };
2856 | 
2857 | Unipointer.prototype.ontouchend = function( event ) {
2858 |   var touch = this.getTouch( event.changedTouches );
2859 |   if ( touch ) {
2860 |     this._pointerUp( event, touch );
2861 |   }
2862 | };
2863 | 
2864 | /**
2865 |  * pointer up
2866 |  * @param {Event} event
2867 |  * @param {Event or Touch} pointer
2868 |  * @private
2869 |  */
2870 | Unipointer.prototype._pointerUp = function( event, pointer ) {
2871 |   this._pointerDone();
2872 |   this.pointerUp( event, pointer );
2873 | };
2874 | 
2875 | // public
2876 | Unipointer.prototype.pointerUp = function( event, pointer ) {
2877 |   this.emitEvent( 'pointerUp', [ event, pointer ] );
2878 | };
2879 | 
2880 | // ----- pointer done ----- //
2881 | 
2882 | // triggered on pointer up & pointer cancel
2883 | Unipointer.prototype._pointerDone = function() {
2884 |   // reset properties
2885 |   this.isPointerDown = false;
2886 |   delete this.pointerIdentifier;
2887 |   // remove events
2888 |   this._unbindPostStartEvents();
2889 |   this.pointerDone();
2890 | };
2891 | 
2892 | Unipointer.prototype.pointerDone = noop;
2893 | 
2894 | // ----- pointer cancel ----- //
2895 | 
2896 | Unipointer.prototype.onMSPointerCancel =
2897 | Unipointer.prototype.onpointercancel = function( event ) {
2898 |   if ( event.pointerId == this.pointerIdentifier ) {
2899 |     this._pointerCancel( event, event );
2900 |   }
2901 | };
2902 | 
2903 | Unipointer.prototype.ontouchcancel = function( event ) {
2904 |   var touch = this.getTouch( event.changedTouches );
2905 |   if ( touch ) {
2906 |     this._pointerCancel( event, touch );
2907 |   }
2908 | };
2909 | 
2910 | /**
2911 |  * pointer cancel
2912 |  * @param {Event} event
2913 |  * @param {Event or Touch} pointer
2914 |  * @private
2915 |  */
2916 | Unipointer.prototype._pointerCancel = function( event, pointer ) {
2917 |   this._pointerDone();
2918 |   this.pointerCancel( event, pointer );
2919 | };
2920 | 
2921 | // public
2922 | Unipointer.prototype.pointerCancel = function( event, pointer ) {
2923 |   this.emitEvent( 'pointerCancel', [ event, pointer ] );
2924 | };
2925 | 
2926 | // -----  ----- //
2927 | 
2928 | // utility function for getting x/y cooridinates from event, because IE8
2929 | Unipointer.getPointerPoint = function( pointer ) {
2930 |   return {
2931 |     x: pointer.pageX !== undefined ? pointer.pageX : pointer.clientX,
2932 |     y: pointer.pageY !== undefined ? pointer.pageY : pointer.clientY
2933 |   };
2934 | };
2935 | 
2936 | // -----  ----- //
2937 | 
2938 | return Unipointer;
2939 | 
2940 | }));
2941 | 
2942 | /*!
2943 |  * Unidragger v1.1.3
2944 |  * Draggable base class
2945 |  * MIT license
2946 |  */
2947 | 
2948 | /*jshint browser: true, unused: true, undef: true, strict: true */
2949 | 
2950 | ( function( window, factory ) {
2951 |   /*global define: false, module: false, require: false */
2952 |   
2953 |   // universal module definition
2954 | 
2955 |   if ( typeof define == 'function' && define.amd ) {
2956 |     // AMD
2957 |     define( 'unidragger/unidragger',[
2958 |       'eventie/eventie',
2959 |       'unipointer/unipointer'
2960 |     ], function( eventie, Unipointer ) {
2961 |       return factory( window, eventie, Unipointer );
2962 |     });
2963 |   } else if ( typeof exports == 'object' ) {
2964 |     // CommonJS
2965 |     module.exports = factory(
2966 |       window,
2967 |       require('eventie'),
2968 |       require('unipointer')
2969 |     );
2970 |   } else {
2971 |     // browser global
2972 |     window.Unidragger = factory(
2973 |       window,
2974 |       window.eventie,
2975 |       window.Unipointer
2976 |     );
2977 |   }
2978 | 
2979 | }( window, function factory( window, eventie, Unipointer ) {
2980 | 
2981 | 
2982 | 
2983 | // -----  ----- //
2984 | 
2985 | function noop() {}
2986 | 
2987 | // handle IE8 prevent default
2988 | function preventDefaultEvent( event ) {
2989 |   if ( event.preventDefault ) {
2990 |     event.preventDefault();
2991 |   } else {
2992 |     event.returnValue = false;
2993 |   }
2994 | }
2995 | 
2996 | // -------------------------- Unidragger -------------------------- //
2997 | 
2998 | function Unidragger() {}
2999 | 
3000 | // inherit Unipointer & EventEmitter
3001 | Unidragger.prototype = new Unipointer();
3002 | 
3003 | // ----- bind start ----- //
3004 | 
3005 | Unidragger.prototype.bindHandles = function() {
3006 |   this._bindHandles( true );
3007 | };
3008 | 
3009 | Unidragger.prototype.unbindHandles = function() {
3010 |   this._bindHandles( false );
3011 | };
3012 | 
3013 | var navigator = window.navigator;
3014 | /**
3015 |  * works as unbinder, as you can .bindHandles( false ) to unbind
3016 |  * @param {Boolean} isBind - will unbind if falsey
3017 |  */
3018 | Unidragger.prototype._bindHandles = function( isBind ) {
3019 |   // munge isBind, default to true
3020 |   isBind = isBind === undefined ? true : !!isBind;
3021 |   // extra bind logic
3022 |   var binderExtra;
3023 |   if ( navigator.pointerEnabled ) {
3024 |     binderExtra = function( handle ) {
3025 |       // disable scrolling on the element
3026 |       handle.style.touchAction = isBind ? 'none' : '';
3027 |     };
3028 |   } else if ( navigator.msPointerEnabled ) {
3029 |     binderExtra = function( handle ) {
3030 |       // disable scrolling on the element
3031 |       handle.style.msTouchAction = isBind ? 'none' : '';
3032 |     };
3033 |   } else {
3034 |     binderExtra = function() {
3035 |       // TODO re-enable img.ondragstart when unbinding
3036 |       if ( isBind ) {
3037 |         disableImgOndragstart( handle );
3038 |       }
3039 |     };
3040 |   }
3041 |   // bind each handle
3042 |   var bindMethod = isBind ? 'bind' : 'unbind';
3043 |   for ( var i=0, len = this.handles.length; i < len; i++ ) {
3044 |     var handle = this.handles[i];
3045 |     this._bindStartEvent( handle, isBind );
3046 |     binderExtra( handle );
3047 |     eventie[ bindMethod ]( handle, 'click', this );
3048 |   }
3049 | };
3050 | 
3051 | // remove default dragging interaction on all images in IE8
3052 | // IE8 does its own drag thing on images, which messes stuff up
3053 | 
3054 | function noDragStart() {
3055 |   return false;
3056 | }
3057 | 
3058 | // TODO replace this with a IE8 test
3059 | var isIE8 = 'attachEvent' in document.documentElement;
3060 | 
3061 | // IE8 only
3062 | var disableImgOndragstart = !isIE8 ? noop : function( handle ) {
3063 | 
3064 |   if ( handle.nodeName == 'IMG' ) {
3065 |     handle.ondragstart = noDragStart;
3066 |   }
3067 | 
3068 |   var images = handle.querySelectorAll('img');
3069 |   for ( var i=0, len = images.length; i < len; i++ ) {
3070 |     var img = images[i];
3071 |     img.ondragstart = noDragStart;
3072 |   }
3073 | };
3074 | 
3075 | // ----- start event ----- //
3076 | 
3077 | /**
3078 |  * pointer start
3079 |  * @param {Event} event
3080 |  * @param {Event or Touch} pointer
3081 |  */
3082 | Unidragger.prototype.pointerDown = function( event, pointer ) {
3083 |   this._dragPointerDown( event, pointer );
3084 |   // kludge to blur focused inputs in dragger
3085 |   var focused = document.activeElement;
3086 |   if ( focused && focused.blur ) {
3087 |     focused.blur();
3088 |   }
3089 |   // bind move and end events
3090 |   this._bindPostStartEvents( event );
3091 |   this.emitEvent( 'pointerDown', [ event, pointer ] );
3092 | };
3093 | 
3094 | // base pointer down logic
3095 | Unidragger.prototype._dragPointerDown = function( event, pointer ) {
3096 |   // track to see when dragging starts
3097 |   this.pointerDownPoint = Unipointer.getPointerPoint( pointer );
3098 | 
3099 |   // prevent default, unless touchstart or <select>
3100 |   var isTouchstart = event.type == 'touchstart';
3101 |   var targetNodeName = event.target.nodeName;
3102 |   if ( !isTouchstart && targetNodeName != 'SELECT' ) {
3103 |     preventDefaultEvent( event );
3104 |   }
3105 | };
3106 | 
3107 | // ----- move event ----- //
3108 | 
3109 | /**
3110 |  * drag move
3111 |  * @param {Event} event
3112 |  * @param {Event or Touch} pointer
3113 |  */
3114 | Unidragger.prototype.pointerMove = function( event, pointer ) {
3115 |   var moveVector = this._dragPointerMove( event, pointer );
3116 |   this.emitEvent( 'pointerMove', [ event, pointer, moveVector ] );
3117 |   this._dragMove( event, pointer, moveVector );
3118 | };
3119 | 
3120 | // base pointer move logic
3121 | Unidragger.prototype._dragPointerMove = function( event, pointer ) {
3122 |   var movePoint = Unipointer.getPointerPoint( pointer );
3123 |   var moveVector = {
3124 |     x: movePoint.x - this.pointerDownPoint.x,
3125 |     y: movePoint.y - this.pointerDownPoint.y
3126 |   };
3127 |   // start drag if pointer has moved far enough to start drag
3128 |   if ( !this.isDragging && this.hasDragStarted( moveVector ) ) {
3129 |     this._dragStart( event, pointer );
3130 |   }
3131 |   return moveVector;
3132 | };
3133 | 
3134 | // condition if pointer has moved far enough to start drag
3135 | Unidragger.prototype.hasDragStarted = function( moveVector ) {
3136 |   return Math.abs( moveVector.x ) > 3 || Math.abs( moveVector.y ) > 3;
3137 | };
3138 | 
3139 | 
3140 | // ----- end event ----- //
3141 | 
3142 | /**
3143 |  * pointer up
3144 |  * @param {Event} event
3145 |  * @param {Event or Touch} pointer
3146 |  */
3147 | Unidragger.prototype.pointerUp = function( event, pointer ) {
3148 |   this.emitEvent( 'pointerUp', [ event, pointer ] );
3149 |   this._dragPointerUp( event, pointer );
3150 | };
3151 | 
3152 | Unidragger.prototype._dragPointerUp = function( event, pointer ) {
3153 |   if ( this.isDragging ) {
3154 |     this._dragEnd( event, pointer );
3155 |   } else {
3156 |     // pointer didn't move enough for drag to start
3157 |     this._staticClick( event, pointer );
3158 |   }
3159 | };
3160 | 
3161 | // -------------------------- drag -------------------------- //
3162 | 
3163 | // dragStart
3164 | Unidragger.prototype._dragStart = function( event, pointer ) {
3165 |   this.isDragging = true;
3166 |   this.dragStartPoint = Unidragger.getPointerPoint( pointer );
3167 |   // prevent clicks
3168 |   this.isPreventingClicks = true;
3169 | 
3170 |   this.dragStart( event, pointer );
3171 | };
3172 | 
3173 | Unidragger.prototype.dragStart = function( event, pointer ) {
3174 |   this.emitEvent( 'dragStart', [ event, pointer ] );
3175 | };
3176 | 
3177 | // dragMove
3178 | Unidragger.prototype._dragMove = function( event, pointer, moveVector ) {
3179 |   // do not drag if not dragging yet
3180 |   if ( !this.isDragging ) {
3181 |     return;
3182 |   }
3183 | 
3184 |   this.dragMove( event, pointer, moveVector );
3185 | };
3186 | 
3187 | Unidragger.prototype.dragMove = function( event, pointer, moveVector ) {
3188 |   preventDefaultEvent( event );
3189 |   this.emitEvent( 'dragMove', [ event, pointer, moveVector ] );
3190 | };
3191 | 
3192 | // dragEnd
3193 | Unidragger.prototype._dragEnd = function( event, pointer ) {
3194 |   // set flags
3195 |   this.isDragging = false;
3196 |   // re-enable clicking async
3197 |   var _this = this;
3198 |   setTimeout( function() {
3199 |     delete _this.isPreventingClicks;
3200 |   });
3201 | 
3202 |   this.dragEnd( event, pointer );
3203 | };
3204 | 
3205 | Unidragger.prototype.dragEnd = function( event, pointer ) {
3206 |   this.emitEvent( 'dragEnd', [ event, pointer ] );
3207 | };
3208 | 
3209 | // ----- onclick ----- //
3210 | 
3211 | // handle all clicks and prevent clicks when dragging
3212 | Unidragger.prototype.onclick = function( event ) {
3213 |   if ( this.isPreventingClicks ) {
3214 |     preventDefaultEvent( event );
3215 |   }
3216 | };
3217 | 
3218 | // ----- staticClick ----- //
3219 | 
3220 | // triggered after pointer down & up with no/tiny movement
3221 | Unidragger.prototype._staticClick = function( event, pointer ) {
3222 |   // allow click in <input>s and <textarea>s
3223 |   var nodeName = event.target.nodeName;
3224 |   if ( nodeName == 'INPUT' || nodeName == 'TEXTAREA' ) {
3225 |     event.target.focus();
3226 |   }
3227 |   this.staticClick( event, pointer );
3228 | };
3229 | 
3230 | Unidragger.prototype.staticClick = function( event, pointer ) {
3231 |   this.emitEvent( 'staticClick', [ event, pointer ] );
3232 | };
3233 | 
3234 | // -----  ----- //
3235 | 
3236 | Unidragger.getPointerPoint = function( pointer ) {
3237 |   return {
3238 |     x: pointer.pageX !== undefined ? pointer.pageX : pointer.clientX,
3239 |     y: pointer.pageY !== undefined ? pointer.pageY : pointer.clientY
3240 |   };
3241 | };
3242 | 
3243 | // -----  ----- //
3244 | 
3245 | Unidragger.getPointerPoint = Unipointer.getPointerPoint;
3246 | 
3247 | return Unidragger;
3248 | 
3249 | }));
3250 | 
3251 | ( function( window, factory ) {
3252 |   
3253 |   // universal module definition
3254 | 
3255 |   if ( typeof define == 'function' && define.amd ) {
3256 |     // AMD
3257 |     define( 'flickity/js/drag',[
3258 |       'classie/classie',
3259 |       'eventie/eventie',
3260 |       './flickity',
3261 |       'unidragger/unidragger',
3262 |       'fizzy-ui-utils/utils'
3263 |     ], function( classie, eventie, Flickity, Unidragger, utils ) {
3264 |       return factory( window, classie, eventie, Flickity, Unidragger, utils );
3265 |     });
3266 |   } else if ( typeof exports == 'object' ) {
3267 |     // CommonJS
3268 |     module.exports = factory(
3269 |       window,
3270 |       require('desandro-classie'),
3271 |       require('eventie'),
3272 |       require('./flickity'),
3273 |       require('unidragger'),
3274 |       require('fizzy-ui-utils')
3275 |     );
3276 |   } else {
3277 |     // browser global
3278 |     window.Flickity = window.Flickity || {};
3279 |     window.Flickity.dragPrototype = factory(
3280 |       window,
3281 |       window.classie,
3282 |       window.eventie,
3283 |       window.Flickity,
3284 |       window.Unidragger,
3285 |       window.fizzyUIUtils
3286 |     );
3287 |   }
3288 | 
3289 | }( window, function factory( window, classie, eventie, Flickity, Unidragger, utils ) {
3290 | 
3291 | 
3292 | 
3293 | // handle IE8 prevent default
3294 | function preventDefaultEvent( event ) {
3295 |   if ( event.preventDefault ) {
3296 |     event.preventDefault();
3297 |   } else {
3298 |     event.returnValue = false;
3299 |   }
3300 | }
3301 | 
3302 | // ----- defaults ----- //
3303 | 
3304 | utils.extend( Flickity.defaults, {
3305 |   draggable: true,
3306 |   touchVerticalScroll: true
3307 | });
3308 | 
3309 | // ----- create ----- //
3310 | 
3311 | Flickity.createMethods.push('_createDrag');
3312 | 
3313 | // -------------------------- drag prototype -------------------------- //
3314 | 
3315 | var proto = {};
3316 | utils.extend( proto, Unidragger.prototype );
3317 | 
3318 | // --------------------------  -------------------------- //
3319 | 
3320 | proto._createDrag = function() {
3321 |   this.on( 'activate', this.bindDrag );
3322 |   this.on( 'uiChange', this._uiChangeDrag );
3323 |   this.on( 'childUIPointerDown', this._childUIPointerDownDrag );
3324 |   this.on( 'deactivate', this.unbindDrag );
3325 | };
3326 | 
3327 | proto.bindDrag = function() {
3328 |   if ( !this.options.draggable || this.isDragBound ) {
3329 |     return;
3330 |   }
3331 |   classie.add( this.element, 'is-draggable' );
3332 |   this.handles = [ this.viewport ];
3333 |   this.bindHandles();
3334 |   this.isDragBound = true;
3335 | };
3336 | 
3337 | proto.unbindDrag = function() {
3338 |   if ( !this.isDragBound ) {
3339 |     return;
3340 |   }
3341 |   classie.remove( this.element, 'is-draggable' );
3342 |   this.unbindHandles();
3343 |   delete this.isDragBound;
3344 | };
3345 | 
3346 | proto._uiChangeDrag = function() {
3347 |   delete this.isFreeScrolling;
3348 | };
3349 | 
3350 | proto._childUIPointerDownDrag = function( event ) {
3351 |   preventDefaultEvent( event );
3352 |   this.pointerDownFocus( event );
3353 | };
3354 | 
3355 | // -------------------------- pointer events -------------------------- //
3356 | 
3357 | proto.pointerDown = function( event, pointer ) {
3358 |   this._dragPointerDown( event, pointer );
3359 | 
3360 |   // kludge to blur focused inputs in dragger
3361 |   var focused = document.activeElement;
3362 |   if ( focused && focused.blur && focused != this.element &&
3363 |     // do not blur body for IE9 & 10, #117
3364 |     focused != document.body ) {
3365 |     focused.blur();
3366 |   }
3367 |   this.pointerDownFocus( event );
3368 |   // stop if it was moving
3369 |   this.velocity = 0;
3370 |   classie.add( this.viewport, 'is-pointer-down' );
3371 |   // bind move and end events
3372 |   this._bindPostStartEvents( event );
3373 |   this.dispatchEvent( 'pointerDown', event, [ pointer ] );
3374 | };
3375 | 
3376 | var touchStartEvents = {
3377 |   touchstart: true,
3378 |   MSPointerDown: true
3379 | };
3380 | 
3381 | var focusNodes = {
3382 |   INPUT: true,
3383 |   SELECT: true
3384 | };
3385 | 
3386 | proto.pointerDownFocus = function( event ) {
3387 |   // focus element, if not touch, and its not an input or select
3388 |   if ( this.options.accessibility && !touchStartEvents[ event.type ] &&
3389 |       !focusNodes[ event.target.nodeName ] ) {
3390 |     this.element.focus();
3391 |   }
3392 | };
3393 | 
3394 | // ----- move ----- //
3395 | 
3396 | proto.pointerMove = function( event, pointer ) {
3397 |   var moveVector = this._dragPointerMove( event, pointer );
3398 |   this.touchVerticalScrollMove( event, pointer, moveVector );
3399 |   this._dragMove( event, pointer, moveVector );
3400 |   this.dispatchEvent( 'pointerMove', event, [ pointer, moveVector ] );
3401 | };
3402 | 
3403 | proto.hasDragStarted = function( moveVector ) {
3404 |   return !this.isTouchScrolling && Math.abs( moveVector.x ) > 3;
3405 | };
3406 | 
3407 | // ----- up ----- //
3408 | 
3409 | proto.pointerUp = function( event, pointer ) {
3410 |   delete this.isTouchScrolling;
3411 |   classie.remove( this.viewport, 'is-pointer-down' );
3412 |   this.dispatchEvent( 'pointerUp', event, [ pointer ] );
3413 |   this._dragPointerUp( event, pointer );
3414 | };
3415 | 
3416 | // -------------------------- vertical scroll -------------------------- //
3417 | 
3418 | var touchScrollEvents = {
3419 |   // move events
3420 |   // mousemove: true,
3421 |   touchmove: true,
3422 |   MSPointerMove: true
3423 | };
3424 | 
3425 | // position of pointer, relative to window
3426 | function getPointerWindowY( pointer ) {
3427 |   var pointerPoint = Unidragger.getPointerPoint( pointer );
3428 |   return pointerPoint.y - window.pageYOffset;
3429 | }
3430 | 
3431 | proto.touchVerticalScrollMove = function( event, pointer, moveVector ) {
3432 |   // do not scroll if already dragging, if disabled
3433 |   var touchVerticalScroll = this.options.touchVerticalScroll;
3434 |   // if touchVerticalScroll is 'withDrag', allow scrolling and dragging
3435 |   var canNotScroll = touchVerticalScroll == 'withDrag' ? !touchVerticalScroll :
3436 |     this.isDragging || !touchVerticalScroll;
3437 |   if ( canNotScroll || !touchScrollEvents[ event.type ] ) {
3438 |     return;
3439 |   }
3440 |   // don't start vertical scrolling until pointer has moved 10 pixels in a direction
3441 |   if ( !this.isTouchScrolling && Math.abs( moveVector.y ) > 10 ) {
3442 |     // start touch vertical scrolling
3443 |     // scroll & pointerY when started
3444 |     this.startScrollY = window.pageYOffset;
3445 |     this.pointerWindowStartY = getPointerWindowY( pointer );
3446 |     // start scroll animation
3447 |     this.isTouchScrolling = true;
3448 |   }
3449 | };
3450 | 
3451 | // -------------------------- dragging -------------------------- //
3452 | 
3453 | proto.dragStart = function( event, pointer ) {
3454 |   this.dragStartPosition = this.x;
3455 |   this.startAnimation();
3456 |   this.dispatchEvent( 'dragStart', event, [ pointer ] );
3457 | };
3458 | 
3459 | proto.dragMove = function( event, pointer, moveVector ) {
3460 |   preventDefaultEvent( event );
3461 | 
3462 |   this.previousDragX = this.x;
3463 | 
3464 |   var movedX = moveVector.x;
3465 |   // reverse if right-to-left
3466 |   var direction = this.options.rightToLeft ? -1 : 1;
3467 |   this.x = this.dragStartPosition + movedX * direction;
3468 | 
3469 |   if ( !this.options.wrapAround && this.cells.length ) {
3470 |     // slow drag
3471 |     var originBound = Math.max( -this.cells[0].target, this.dragStartPosition);
3472 |     this.x = this.x > originBound ? ( this.x - originBound ) * 0.5 + originBound : this.x;
3473 |     var endBound = Math.min( -this.getLastCell().target, this.dragStartPosition );
3474 |     this.x = this.x < endBound ? ( this.x - endBound ) * 0.5 + endBound : this.x;
3475 |   }
3476 | 
3477 |   this.previousDragMoveTime = this.dragMoveTime;
3478 |   this.dragMoveTime = new Date();
3479 |   this.dispatchEvent( 'dragMove', event, [ pointer, moveVector ] );
3480 | };
3481 | 
3482 | proto.dragEnd = function( event, pointer ) {
3483 |   this.dragEndFlick();
3484 |   if ( this.options.freeScroll ) {
3485 |     this.isFreeScrolling = true;
3486 |   }
3487 |   // set selectedIndex based on where flick will end up
3488 |   var index = this.dragEndRestingSelect();
3489 | 
3490 |   if ( this.options.freeScroll && !this.options.wrapAround ) {
3491 |     // if free-scroll & not wrap around
3492 |     // do not free-scroll if going outside of bounding cells
3493 |     // so bounding cells can attract slider, and keep it in bounds
3494 |     var restingX = this.getRestingPosition();
3495 |     this.isFreeScrolling = -restingX > this.cells[0].target &&
3496 |       -restingX < this.getLastCell().target;
3497 |   } else if ( !this.options.freeScroll && index == this.selectedIndex ) {
3498 |     // boost selection if selected index has not changed
3499 |     index += this.dragEndBoostSelect();
3500 |   }
3501 |   // apply selection
3502 |   // TODO refactor this, selecting here feels weird
3503 |   this.select( index );
3504 |   this.dispatchEvent( 'dragEnd', event, [ pointer ] );
3505 | };
3506 | 
3507 | // apply velocity after dragging
3508 | proto.dragEndFlick = function() {
3509 |   if ( !isFinite( this.previousDragX ) ) {
3510 |     return;
3511 |   }
3512 |   // set slider velocity
3513 |   var timeDelta = this.dragMoveTime - this.previousDragMoveTime;
3514 |   // prevent divide by 0, if dragMove & dragEnd happened at same time
3515 |   if ( timeDelta ) {
3516 |     // 60 frames per second, ideally
3517 |     // TODO, velocity should be in pixels per millisecond
3518 |     // currently in pixels per frame
3519 |     timeDelta /= 1000 / 60;
3520 |     var xDelta = this.x - this.previousDragX;
3521 |     this.velocity = xDelta / timeDelta;
3522 |   }
3523 |   // reset
3524 |   delete this.previousDragX;
3525 | };
3526 | 
3527 | proto.dragEndRestingSelect = function() {
3528 |   var restingX = this.getRestingPosition();
3529 |   // how far away from selected cell
3530 |   var distance = Math.abs( this.getCellDistance( -restingX, this.selectedIndex ) );
3531 |   // get closet resting going up and going down
3532 |   var positiveResting = this._getClosestResting( restingX, distance, 1 );
3533 |   var negativeResting = this._getClosestResting( restingX, distance, -1 );
3534 |   // use closer resting for wrap-around
3535 |   var index = positiveResting.distance < negativeResting.distance ?
3536 |     positiveResting.index : negativeResting.index;
3537 |   // for contain, force boost if delta is not greater than 1
3538 |   if ( this.options.contain && !this.options.wrapAround ) {
3539 |     index = Math.abs( index - this.selectedIndex ) <= 1 ? this.selectedIndex : index;
3540 |   }
3541 |   return index;
3542 | };
3543 | 
3544 | /**
3545 |  * given resting X and distance to selected cell
3546 |  * get the distance and index of the closest cell
3547 |  * @param {Number} restingX - estimated post-flick resting position
3548 |  * @param {Number} distance - distance to selected cell
3549 |  * @param {Integer} increment - +1 or -1, going up or down
3550 |  * @returns {Object} - { distance: {Number}, index: {Integer} }
3551 |  */
3552 | proto._getClosestResting = function( restingX, distance, increment ) {
3553 |   var index = this.selectedIndex;
3554 |   var minDistance = Infinity;
3555 |   var condition = this.options.contain && !this.options.wrapAround ?
3556 |     // if contain, keep going if distance is equal to minDistance
3557 |     function( d, md ) { return d <= md; } : function( d, md ) { return d < md; };
3558 |   while ( condition( distance, minDistance ) ) {
3559 |     // measure distance to next cell
3560 |     index += increment;
3561 |     minDistance = distance;
3562 |     distance = this.getCellDistance( -restingX, index );
3563 |     if ( distance === null ) {
3564 |       break;
3565 |     }
3566 |     distance = Math.abs( distance );
3567 |   }
3568 |   return {
3569 |     distance: minDistance,
3570 |     // selected was previous index
3571 |     index: index - increment
3572 |   };
3573 | };
3574 | 
3575 | /**
3576 |  * measure distance between x and a cell target
3577 |  * @param {Number} x
3578 |  * @param {Integer} index - cell index
3579 |  */
3580 | proto.getCellDistance = function( x, index ) {
3581 |   var len = this.cells.length;
3582 |   // wrap around if at least 2 cells
3583 |   var isWrapAround = this.options.wrapAround && len > 1;
3584 |   var cellIndex = isWrapAround ? utils.modulo( index, len ) : index;
3585 |   var cell = this.cells[ cellIndex ];
3586 |   if ( !cell ) {
3587 |     return null;
3588 |   }
3589 |   // add distance for wrap-around cells
3590 |   var wrap = isWrapAround ? this.slideableWidth * Math.floor( index / len ) : 0;
3591 |   return x - ( cell.target + wrap );
3592 | };
3593 | 
3594 | proto.dragEndBoostSelect = function() {
3595 |   var distance = this.getCellDistance( -this.x, this.selectedIndex );
3596 |   if ( distance > 0 && this.velocity < -1 ) {
3597 |     // if moving towards the right, and positive velocity, and the next attractor
3598 |     return 1;
3599 |   } else if ( distance < 0 && this.velocity > 1 ) {
3600 |     // if moving towards the left, and negative velocity, and previous attractor
3601 |     return -1;
3602 |   }
3603 |   return 0;
3604 | };
3605 | 
3606 | // ----- staticClick ----- //
3607 | 
3608 | proto.staticClick = function( event, pointer ) {
3609 |   // get clickedCell, if cell was clicked
3610 |   var clickedCell = this.getParentCell( event.target );
3611 |   var cellElem = clickedCell && clickedCell.element;
3612 |   var cellIndex = clickedCell && utils.indexOf( this.cells, clickedCell );
3613 |   this.dispatchEvent( 'staticClick', event, [ pointer, cellElem, cellIndex ] );
3614 | };
3615 | 
3616 | // -----  ----- //
3617 | 
3618 | utils.extend( Flickity.prototype, proto );
3619 | 
3620 | // -----  ----- //
3621 | 
3622 | return Flickity;
3623 | 
3624 | }));
3625 | 
3626 | /*!
3627 |  * Tap listener v1.1.1
3628 |  * listens to taps
3629 |  * MIT license
3630 |  */
3631 | 
3632 | /*jshint browser: true, unused: true, undef: true, strict: true */
3633 | 
3634 | ( function( window, factory ) {
3635 |   /*global define: false, module: false, require: false */
3636 |   
3637 |   // universal module definition
3638 | 
3639 |   if ( typeof define == 'function' && define.amd ) {
3640 |     // AMD
3641 |     define( 'tap-listener/tap-listener',[
3642 |       'unipointer/unipointer'
3643 |     ], function( Unipointer ) {
3644 |       return factory( window, Unipointer );
3645 |     });
3646 |   } else if ( typeof exports == 'object' ) {
3647 |     // CommonJS
3648 |     module.exports = factory(
3649 |       window,
3650 |       require('unipointer')
3651 |     );
3652 |   } else {
3653 |     // browser global
3654 |     window.TapListener = factory(
3655 |       window,
3656 |       window.Unipointer
3657 |     );
3658 |   }
3659 | 
3660 | }( window, function factory( window, Unipointer ) {
3661 | 
3662 | 
3663 | 
3664 | // handle IE8 prevent default
3665 | function preventDefaultEvent( event ) {
3666 |   if ( event.preventDefault ) {
3667 |     event.preventDefault();
3668 |   } else {
3669 |     event.returnValue = false;
3670 |   }
3671 | }
3672 | 
3673 | // --------------------------  TapListener -------------------------- //
3674 | 
3675 | function TapListener( elem ) {
3676 |   this.bindTap( elem );
3677 | }
3678 | 
3679 | // inherit Unipointer & EventEmitter
3680 | TapListener.prototype = new Unipointer();
3681 | 
3682 | /**
3683 |  * bind tap event to element
3684 |  * @param {Element} elem
3685 |  */
3686 | TapListener.prototype.bindTap = function( elem ) {
3687 |   if ( !elem ) {
3688 |     return;
3689 |   }
3690 |   this.unbindTap();
3691 |   this.tapElement = elem;
3692 |   this._bindStartEvent( elem, true );
3693 | };
3694 | 
3695 | TapListener.prototype.unbindTap = function() {
3696 |   if ( !this.tapElement ) {
3697 |     return;
3698 |   }
3699 |   this._bindStartEvent( this.tapElement, true );
3700 |   delete this.tapElement;
3701 | };
3702 | 
3703 | var pointerDown = TapListener.prototype.pointerDown;
3704 | 
3705 | TapListener.prototype.pointerDown = function( event ) {
3706 |   // prevent default event for touch, disables tap then click
3707 |   if ( event.type == 'touchstart' ) {
3708 |     preventDefaultEvent( event );
3709 |   }
3710 |   pointerDown.apply( this, arguments );
3711 | };
3712 | 
3713 | var isPageOffset = window.pageYOffset !== undefined;
3714 | /**
3715 |  * pointer up
3716 |  * @param {Event} event
3717 |  * @param {Event or Touch} pointer
3718 |  */
3719 | TapListener.prototype.pointerUp = function( event, pointer ) {
3720 |   var pointerPoint = Unipointer.getPointerPoint( pointer );
3721 |   var boundingRect = this.tapElement.getBoundingClientRect();
3722 |   // standard or IE8 scroll positions
3723 |   var scrollX = isPageOffset ? window.pageXOffset : document.body.scrollLeft;
3724 |   var scrollY = isPageOffset ? window.pageYOffset : document.body.scrollTop;
3725 |   // calculate if pointer is inside tapElement
3726 |   var isInside = pointerPoint.x >= boundingRect.left + scrollX &&
3727 |     pointerPoint.x <= boundingRect.right + scrollX &&
3728 |     pointerPoint.y >= boundingRect.top + scrollY &&
3729 |     pointerPoint.y <= boundingRect.bottom + scrollY;
3730 |   // trigger callback if pointer is inside element
3731 |   if ( isInside ) {
3732 |     this.emitEvent( 'tap', [ event, pointer ] );
3733 |   }
3734 | };
3735 | 
3736 | TapListener.prototype.destroy = function() {
3737 |   this.pointerDone();
3738 |   this.unbindTap();
3739 | };
3740 | 
3741 | // -----  ----- //
3742 | 
3743 | return TapListener;
3744 | 
3745 | }));
3746 | 
3747 | // -------------------------- prev/next button -------------------------- //
3748 | 
3749 | ( function( window, factory ) {
3750 |   
3751 |   // universal module definition
3752 | 
3753 |   if ( typeof define == 'function' && define.amd ) {
3754 |     // AMD
3755 |     define( 'flickity/js/prev-next-button',[
3756 |       'eventie/eventie',
3757 |       './flickity',
3758 |       'tap-listener/tap-listener',
3759 |       'fizzy-ui-utils/utils'
3760 |     ], function( eventie, Flickity, TapListener, utils ) {
3761 |       return factory( window, eventie, Flickity, TapListener, utils );
3762 |     });
3763 |   } else if ( typeof exports == 'object' ) {
3764 |     // CommonJS
3765 |     module.exports = factory(
3766 |       window,
3767 |       require('eventie'),
3768 |       require('./flickity'),
3769 |       require('tap-listener'),
3770 |       require('fizzy-ui-utils')
3771 |     );
3772 |   } else {
3773 |     // browser global
3774 |     window.Flickity = window.Flickity || {};
3775 |     window.Flickity.PrevNextButton = factory(
3776 |       window,
3777 |       window.eventie,
3778 |       window.Flickity,
3779 |       window.TapListener,
3780 |       window.fizzyUIUtils
3781 |     );
3782 |   }
3783 | 
3784 | }( window, function factory( window, eventie, Flickity, TapListener, utils ) {
3785 | 
3786 | 
3787 | 
3788 | // ----- inline SVG support ----- //
3789 | 
3790 | var svgURI = 'http://www.w3.org/2000/svg';
3791 | 
3792 | // only check on demand, not on script load
3793 | var supportsInlineSVG = ( function() {
3794 |   var supports;
3795 |   function checkSupport() {
3796 |     if ( supports !== undefined ) {
3797 |       return supports;
3798 |     }
3799 |     var div = document.createElement('div');
3800 |     div.innerHTML = '<svg/>';
3801 |     supports = ( div.firstChild && div.firstChild.namespaceURI ) == svgURI;
3802 |     return supports;
3803 |   }
3804 |   return checkSupport;
3805 | })();
3806 | 
3807 | // -------------------------- PrevNextButton -------------------------- //
3808 | 
3809 | function PrevNextButton( direction, parent ) {
3810 |   this.direction = direction;
3811 |   this.parent = parent;
3812 |   this._create();
3813 | }
3814 | 
3815 | PrevNextButton.prototype = new TapListener();
3816 | 
3817 | PrevNextButton.prototype._create = function() {
3818 |   // properties
3819 |   this.isEnabled = true;
3820 |   this.isPrevious = this.direction == -1;
3821 |   var leftDirection = this.parent.options.rightToLeft ? 1 : -1;
3822 |   this.isLeft = this.direction == leftDirection;
3823 | 
3824 |   var element = this.element = document.createElement('button');
3825 |   element.className = 'flickity-prev-next-button';
3826 |   element.className += this.isPrevious ? ' previous' : ' next';
3827 |   // prevent button from submitting form http://stackoverflow.com/a/10836076/182183
3828 |   element.setAttribute( 'type', 'button' );
3829 |   Flickity.setUnselectable( element );
3830 |   // create arrow
3831 |   if ( supportsInlineSVG() ) {
3832 |     var svg = this.createSVG();
3833 |     element.appendChild( svg );
3834 |   } else {
3835 |     // SVG not supported, set button text
3836 |     this.setArrowText();
3837 |     element.className += ' no-svg';
3838 |   }
3839 |   // update on select
3840 |   var _this = this;
3841 |   this.onCellSelect = function() {
3842 |     _this.update();
3843 |   };
3844 |   this.parent.on( 'cellSelect', this.onCellSelect );
3845 |   // tap
3846 |   this.on( 'tap', this.onTap );
3847 |   // pointerDown
3848 |   this.on( 'pointerDown', function onPointerDown( button, event ) {
3849 |     _this.parent.childUIPointerDown( event );
3850 |   });
3851 | };
3852 | 
3853 | PrevNextButton.prototype.activate = function() {
3854 |   this.update();
3855 |   this.bindTap( this.element );
3856 |   // click events from keyboard
3857 |   eventie.bind( this.element, 'click', this );
3858 |   // add to DOM
3859 |   this.parent.element.appendChild( this.element );
3860 | };
3861 | 
3862 | PrevNextButton.prototype.deactivate = function() {
3863 |   // remove from DOM
3864 |   this.parent.element.removeChild( this.element );
3865 |   // do regular TapListener destroy
3866 |   TapListener.prototype.destroy.call( this );
3867 |   // click events from keyboard
3868 |   eventie.unbind( this.element, 'click', this );
3869 | };
3870 | 
3871 | PrevNextButton.prototype.createSVG = function() {
3872 |   var svg = document.createElementNS( svgURI, 'svg');
3873 |   svg.setAttribute( 'viewBox', '0 0 100 100' );
3874 |   var path = document.createElementNS( svgURI, 'path');
3875 |   path.setAttribute( 'd', 'M 50,0 L 60,10 L 20,50 L 60,90 L 50,100 L 0,50 Z' );
3876 |   path.setAttribute( 'class', 'arrow' );
3877 |   // adjust arrow
3878 |   var arrowTransform = this.isLeft ? 'translate(15,0)' :
3879 |     'translate(85,100) rotate(180)';
3880 |   path.setAttribute( 'transform', arrowTransform );
3881 |   svg.appendChild( path );
3882 |   return svg;
3883 | };
3884 | 
3885 | PrevNextButton.prototype.setArrowText = function() {
3886 |   var parentOptions = this.parent.options;
3887 |   var arrowText = this.isLeft ? parentOptions.leftArrowText : parentOptions.rightArrowText;
3888 |   utils.setText( this.element, arrowText );
3889 | };
3890 | 
3891 | PrevNextButton.prototype.onTap = function() {
3892 |   if ( !this.isEnabled ) {
3893 |     return;
3894 |   }
3895 |   this.parent.uiChange();
3896 |   var method = this.isPrevious ? 'previous' : 'next';
3897 |   this.parent[ method ]();
3898 | };
3899 | 
3900 | PrevNextButton.prototype.handleEvent = utils.handleEvent;
3901 | 
3902 | PrevNextButton.prototype.onclick = function() {
3903 |   // only allow clicks from keyboard
3904 |   var focused = document.activeElement;
3905 |   if ( focused && focused == this.element ) {
3906 |     this.onTap();
3907 |   }
3908 | };
3909 | 
3910 | // -----  ----- //
3911 | 
3912 | PrevNextButton.prototype.enable = function() {
3913 |   if ( this.isEnabled ) {
3914 |     return;
3915 |   }
3916 |   this.element.disabled = false;
3917 |   this.isEnabled = true;
3918 | };
3919 | 
3920 | PrevNextButton.prototype.disable = function() {
3921 |   if ( !this.isEnabled ) {
3922 |     return;
3923 |   }
3924 |   this.element.disabled = true;
3925 |   this.isEnabled = false;
3926 | };
3927 | 
3928 | PrevNextButton.prototype.update = function() {
3929 |   // index of first or last cell, if previous or next
3930 |   var cells = this.parent.cells;
3931 |   // enable is wrapAround and at least 2 cells
3932 |   if ( this.parent.options.wrapAround && cells.length > 1 ) {
3933 |     this.enable();
3934 |     return;
3935 |   }
3936 |   var lastIndex = cells.length ? cells.length - 1 : 0;
3937 |   var boundIndex = this.isPrevious ? 0 : lastIndex;
3938 |   var method = this.parent.selectedIndex == boundIndex ? 'disable' : 'enable';
3939 |   this[ method ]();
3940 | };
3941 | 
3942 | PrevNextButton.prototype.destroy = function() {
3943 |   this.deactivate();
3944 | };
3945 | 
3946 | // -------------------------- Flickity prototype -------------------------- //
3947 | 
3948 | utils.extend( Flickity.defaults, {
3949 |   prevNextButtons: true,
3950 |   leftArrowText: '‹',
3951 |   rightArrowText: '›'
3952 | });
3953 | 
3954 | Flickity.createMethods.push('_createPrevNextButtons');
3955 | 
3956 | Flickity.prototype._createPrevNextButtons = function() {
3957 |   if ( !this.options.prevNextButtons ) {
3958 |     return;
3959 |   }
3960 | 
3961 |   this.prevButton = new PrevNextButton( -1, this );
3962 |   this.nextButton = new PrevNextButton( 1, this );
3963 | 
3964 |   this.on( 'activate', this.activatePrevNextButtons );
3965 | };
3966 | 
3967 | Flickity.prototype.activatePrevNextButtons = function() {
3968 |   this.prevButton.activate();
3969 |   this.nextButton.activate();
3970 |   this.on( 'deactivate', this.deactivatePrevNextButtons );
3971 | };
3972 | 
3973 | Flickity.prototype.deactivatePrevNextButtons = function() {
3974 |   this.prevButton.deactivate();
3975 |   this.nextButton.deactivate();
3976 |   this.off( 'deactivate', this.deactivatePrevNextButtons );
3977 | };
3978 | 
3979 | // --------------------------  -------------------------- //
3980 | 
3981 | Flickity.PrevNextButton = PrevNextButton;
3982 | 
3983 | return PrevNextButton;
3984 | 
3985 | }));
3986 | 
3987 | ( function( window, factory ) {
3988 |   
3989 |   // universal module definition
3990 | 
3991 |   if ( typeof define == 'function' && define.amd ) {
3992 |     // AMD
3993 |     define( 'flickity/js/page-dots',[
3994 |       'eventie/eventie',
3995 |       './flickity',
3996 |       'tap-listener/tap-listener',
3997 |       'fizzy-ui-utils/utils'
3998 |     ], function( eventie, Flickity, TapListener, utils ) {
3999 |       return factory( window, eventie, Flickity, TapListener, utils );
4000 |     });
4001 |   } else if ( typeof exports == 'object' ) {
4002 |     // CommonJS
4003 |     module.exports = factory(
4004 |       window,
4005 |       require('eventie'),
4006 |       require('./flickity'),
4007 |       require('tap-listener'),
4008 |       require('fizzy-ui-utils')
4009 |     );
4010 |   } else {
4011 |     // browser global
4012 |     window.Flickity = window.Flickity || {};
4013 |     window.Flickity.PageDots = factory(
4014 |       window,
4015 |       window.eventie,
4016 |       window.Flickity,
4017 |       window.TapListener,
4018 |       window.fizzyUIUtils
4019 |     );
4020 |   }
4021 | 
4022 | }( window, function factory( window, eventie, Flickity, TapListener, utils ) {
4023 | 
4024 | // -------------------------- PageDots -------------------------- //
4025 | 
4026 | 
4027 | 
4028 | function PageDots( parent ) {
4029 |   this.parent = parent;
4030 |   this._create();
4031 | }
4032 | 
4033 | PageDots.prototype = new TapListener();
4034 | 
4035 | PageDots.prototype._create = function() {
4036 |   // create holder element
4037 |   this.holder = document.createElement('ol');
4038 |   this.holder.className = 'flickity-page-dots';
4039 |   Flickity.setUnselectable( this.holder );
4040 |   // create dots, array of elements
4041 |   this.dots = [];
4042 |   // update on select
4043 |   var _this = this;
4044 |   this.onCellSelect = function() {
4045 |     _this.updateSelected();
4046 |   };
4047 |   this.parent.on( 'cellSelect', this.onCellSelect );
4048 |   // tap
4049 |   this.on( 'tap', this.onTap );
4050 |   // pointerDown
4051 |   this.on( 'pointerDown', function onPointerDown( button, event ) {
4052 |     _this.parent.childUIPointerDown( event );
4053 |   });
4054 | };
4055 | 
4056 | PageDots.prototype.activate = function() {
4057 |   this.setDots();
4058 |   this.updateSelected();
4059 |   this.bindTap( this.holder );
4060 |   // add to DOM
4061 |   this.parent.element.appendChild( this.holder );
4062 | };
4063 | 
4064 | PageDots.prototype.deactivate = function() {
4065 |   // remove from DOM
4066 |   this.parent.element.removeChild( this.holder );
4067 |   TapListener.prototype.destroy.call( this );
4068 | };
4069 | 
4070 | PageDots.prototype.setDots = function() {
4071 |   // get difference between number of cells and number of dots
4072 |   var delta = this.parent.cells.length - this.dots.length;
4073 |   if ( delta > 0 ) {
4074 |     this.addDots( delta );
4075 |   } else if ( delta < 0 ) {
4076 |     this.removeDots( -delta );
4077 |   }
4078 | };
4079 | 
4080 | PageDots.prototype.addDots = function( count ) {
4081 |   var fragment = document.createDocumentFragment();
4082 |   var newDots = [];
4083 |   while ( count ) {
4084 |     var dot = document.createElement('li');
4085 |     dot.className = 'dot';
4086 |     fragment.appendChild( dot );
4087 |     newDots.push( dot );
4088 |     count--;
4089 |   }
4090 |   this.holder.appendChild( fragment );
4091 |   this.dots = this.dots.concat( newDots );
4092 | };
4093 | 
4094 | PageDots.prototype.removeDots = function( count ) {
4095 |   // remove from this.dots collection
4096 |   var removeDots = this.dots.splice( this.dots.length - count, count );
4097 |   // remove from DOM
4098 |   for ( var i=0, len = removeDots.length; i < len; i++ ) {
4099 |     var dot = removeDots[i];
4100 |     this.holder.removeChild( dot );
4101 |   }
4102 | };
4103 | 
4104 | PageDots.prototype.updateSelected = function() {
4105 |   // remove selected class on previous
4106 |   if ( this.selectedDot ) {
4107 |     this.selectedDot.className = 'dot';
4108 |   }
4109 |   // don't proceed if no dots
4110 |   if ( !this.dots.length ) {
4111 |     return;
4112 |   }
4113 |   this.selectedDot = this.dots[ this.parent.selectedIndex ];
4114 |   this.selectedDot.className = 'dot is-selected';
4115 | };
4116 | 
4117 | PageDots.prototype.onTap = function( event ) {
4118 |   var target = event.target;
4119 |   // only care about dot clicks
4120 |   if ( target.nodeName != 'LI' ) {
4121 |     return;
4122 |   }
4123 | 
4124 |   this.parent.uiChange();
4125 |   var index = utils.indexOf( this.dots, target );
4126 |   this.parent.select( index );
4127 | };
4128 | 
4129 | PageDots.prototype.destroy = function() {
4130 |   this.deactivate();
4131 | };
4132 | 
4133 | Flickity.PageDots = PageDots;
4134 | 
4135 | // -------------------------- Flickity -------------------------- //
4136 | 
4137 | utils.extend( Flickity.defaults, {
4138 |   pageDots: true
4139 | });
4140 | 
4141 | Flickity.createMethods.push('_createPageDots');
4142 | 
4143 | Flickity.prototype._createPageDots = function() {
4144 |   if ( !this.options.pageDots ) {
4145 |     return;
4146 |   }
4147 |   this.pageDots = new PageDots( this );
4148 |   this.on( 'activate', this.activatePageDots );
4149 |   this.on( 'cellAddedRemoved', this.onCellAddedRemovedPageDots );
4150 |   this.on( 'deactivate', this.deactivatePageDots );
4151 | };
4152 | 
4153 | Flickity.prototype.activatePageDots = function() {
4154 |   this.pageDots.activate();
4155 | };
4156 | 
4157 | Flickity.prototype.onCellAddedRemovedPageDots = function() {
4158 |   this.pageDots.setDots();
4159 | };
4160 | 
4161 | Flickity.prototype.deactivatePageDots = function() {
4162 |   this.pageDots.deactivate();
4163 | };
4164 | 
4165 | // -----  ----- //
4166 | 
4167 | Flickity.PageDots = PageDots;
4168 | 
4169 | return PageDots;
4170 | 
4171 | }));
4172 | 
4173 | ( function( window, factory ) {
4174 |   
4175 |   // universal module definition
4176 | 
4177 |   if ( typeof define == 'function' && define.amd ) {
4178 |     // AMD
4179 |     define( 'flickity/js/player',[
4180 |       'eventEmitter/EventEmitter',
4181 |       'eventie/eventie',
4182 |       './flickity'
4183 |     ], function( EventEmitter, eventie, Flickity ) {
4184 |       return factory( EventEmitter, eventie, Flickity );
4185 |     });
4186 |   } else if ( typeof exports == 'object' ) {
4187 |     // CommonJS
4188 |     module.exports = factory(
4189 |       require('wolfy87-eventemitter'),
4190 |       require('eventie'),
4191 |       require('./flickity')
4192 |     );
4193 |   } else {
4194 |     // browser global
4195 |     window.Flickity = window.Flickity || {};
4196 |     window.Flickity.Player = factory(
4197 |       window.EventEmitter,
4198 |       window.eventie,
4199 |       window.Flickity
4200 |     );
4201 |   }
4202 | 
4203 | }( window, function factory( EventEmitter, eventie, Flickity ) {
4204 | 
4205 | 
4206 | 
4207 | // -------------------------- Page Visibility -------------------------- //
4208 | // https://developer.mozilla.org/en-US/docs/Web/Guide/User_experience/Using_the_Page_Visibility_API
4209 | 
4210 | var hiddenProperty, visibilityEvent;
4211 | if ( 'hidden' in document ) {
4212 |   hiddenProperty = 'hidden';
4213 |   visibilityEvent = 'visibilitychange';
4214 | } else if ( 'webkitHidden' in document ) {
4215 |   hiddenProperty = 'webkitHidden';
4216 |   visibilityEvent = 'webkitvisibilitychange';
4217 | }
4218 | 
4219 | // -------------------------- Player -------------------------- //
4220 | 
4221 | function Player( parent ) {
4222 |   this.isPlaying = false;
4223 |   this.parent = parent;
4224 |   // visibility change event handler
4225 |   if ( visibilityEvent ) {
4226 |     var _this = this;
4227 |     this.onVisibilityChange = function() {
4228 |       _this.visibilityChange();
4229 |     };
4230 |   }
4231 | }
4232 | 
4233 | Player.prototype = new EventEmitter();
4234 | 
4235 | // start play
4236 | Player.prototype.play = function() {
4237 |   this.isPlaying = true;
4238 |   // playing kills pauses
4239 |   delete this.isPaused;
4240 |   // listen to visibility change
4241 |   if ( visibilityEvent ) {
4242 |     document.addEventListener( visibilityEvent, this.onVisibilityChange, false );
4243 |   }
4244 |   // start ticking
4245 |   this.tick();
4246 | };
4247 | 
4248 | Player.prototype.tick = function() {
4249 |   // do not tick if paused or not playing
4250 |   if ( !this.isPlaying || this.isPaused ) {
4251 |     return;
4252 |   }
4253 |   // keep track of when .tick()
4254 |   this.tickTime = new Date();
4255 |   var time = this.parent.options.autoPlay;
4256 |   // default to 3 seconds
4257 |   time = typeof time == 'number' ? time : 3000;
4258 |   var _this = this;
4259 |   this.timeout = setTimeout( function() {
4260 |     _this.parent.next( true );
4261 |     _this.tick();
4262 |   }, time );
4263 | };
4264 | 
4265 | Player.prototype.stop = function() {
4266 |   this.isPlaying = false;
4267 |   // stopping kills pauses
4268 |   delete this.isPaused;
4269 |   this.clear();
4270 |   // remove visibility change event
4271 |   if ( visibilityEvent ) {
4272 |     document.removeEventListener( visibilityEvent, this.onVisibilityChange, false );
4273 |   }
4274 | };
4275 | 
4276 | Player.prototype.clear = function() {
4277 |   clearTimeout( this.timeout );
4278 | };
4279 | 
4280 | Player.prototype.pause = function() {
4281 |   if ( this.isPlaying ) {
4282 |     this.isPaused = true;
4283 |     this.clear();
4284 |   }
4285 | };
4286 | 
4287 | Player.prototype.unpause = function() {
4288 |   // re-start play if in unpaused state
4289 |   if ( this.isPaused ) {
4290 |     this.play();
4291 |   }
4292 | };
4293 | 
4294 | // pause if page visibility is hidden, unpause if visible
4295 | Player.prototype.visibilityChange = function() {
4296 |   var isHidden = document[ hiddenProperty ];
4297 |   this[ isHidden ? 'pause' : 'unpause' ]();
4298 | };
4299 | 
4300 | // -------------------------- Flickity -------------------------- //
4301 | 
4302 | // utils.extend( Flickity.defaults, {
4303 | //   autoPlay: false
4304 | // });
4305 | 
4306 | Flickity.createMethods.push('_createPlayer');
4307 | 
4308 | Flickity.prototype._createPlayer = function() {
4309 |   this.player = new Player( this );
4310 | 
4311 |   this.on( 'activate', this.activatePlayer );
4312 |   this.on( 'uiChange', this.stopPlayer );
4313 |   this.on( 'pointerDown', this.stopPlayer );
4314 |   this.on( 'deactivate', this.deactivatePlayer );
4315 | };
4316 | 
4317 | Flickity.prototype.activatePlayer = function() {
4318 |   if ( !this.options.autoPlay ) {
4319 |     return;
4320 |   }
4321 |   this.player.play();
4322 |   eventie.bind( this.element, 'mouseenter', this );
4323 |   this.isMouseenterBound = true;
4324 | };
4325 | 
4326 | Flickity.prototype.stopPlayer = function() {
4327 |   this.player.stop();
4328 | };
4329 | 
4330 | Flickity.prototype.deactivatePlayer = function() {
4331 |   this.player.stop();
4332 |   if ( this.isMouseenterBound ) {
4333 |     eventie.unbind( this.element, 'mouseenter', this );
4334 |     delete this.isMouseenterBound;
4335 |   }
4336 | };
4337 | 
4338 | // ----- mouseenter/leave ----- //
4339 | 
4340 | // pause auto-play on hover
4341 | Flickity.prototype.onmouseenter = function() {
4342 |   this.player.pause();
4343 |   eventie.bind( this.element, 'mouseleave', this );
4344 | };
4345 | 
4346 | // resume auto-play on hover off
4347 | Flickity.prototype.onmouseleave = function() {
4348 |   this.player.unpause();
4349 |   eventie.unbind( this.element, 'mouseleave', this );
4350 | };
4351 | 
4352 | // -----  ----- //
4353 | 
4354 | Flickity.Player = Player;
4355 | 
4356 | return Player;
4357 | 
4358 | }));
4359 | 
4360 | ( function( window, factory ) {
4361 |   
4362 |   // universal module definition
4363 | 
4364 |   if ( typeof define == 'function' && define.amd ) {
4365 |     // AMD
4366 |     define( 'flickity/js/add-remove-cell',[
4367 |       './flickity',
4368 |       'fizzy-ui-utils/utils'
4369 |     ], function( Flickity, utils ) {
4370 |       return factory( window, Flickity, utils );
4371 |     });
4372 |   } else if ( typeof exports == 'object' ) {
4373 |     // CommonJS
4374 |     module.exports = factory(
4375 |       window,
4376 |       require('./flickity'),
4377 |       require('fizzy-ui-utils')
4378 |     );
4379 |   } else {
4380 |     // browser global
4381 |     window.Flickity = window.Flickity || {};
4382 |     window.Flickity = factory(
4383 |       window,
4384 |       window.Flickity,
4385 |       window.fizzyUIUtils
4386 |     );
4387 |   }
4388 | 
4389 | }( window, function factory( window, Flickity, utils ) {
4390 | 
4391 | 
4392 | 
4393 | // append cells to a document fragment
4394 | function getCellsFragment( cells ) {
4395 |   var fragment = document.createDocumentFragment();
4396 |   for ( var i=0, len = cells.length; i < len; i++ ) {
4397 |     var cell = cells[i];
4398 |     fragment.appendChild( cell.element );
4399 |   }
4400 |   return fragment;
4401 | }
4402 | 
4403 | // -------------------------- add/remove cell prototype -------------------------- //
4404 | 
4405 | /**
4406 |  * Insert, prepend, or append cells
4407 |  * @param {Element, Array, NodeList} elems
4408 |  * @param {Integer} index
4409 |  */
4410 | Flickity.prototype.insert = function( elems, index ) {
4411 |   var cells = this._makeCells( elems );
4412 |   if ( !cells || !cells.length ) {
4413 |     return;
4414 |   }
4415 |   var len = this.cells.length;
4416 |   // default to append
4417 |   index = index === undefined ? len : index;
4418 |   // add cells with document fragment
4419 |   var fragment = getCellsFragment( cells );
4420 |   // append to slider
4421 |   var isAppend = index == len;
4422 |   if ( isAppend ) {
4423 |     this.slider.appendChild( fragment );
4424 |   } else {
4425 |     var insertCellElement = this.cells[ index ].element;
4426 |     this.slider.insertBefore( fragment, insertCellElement );
4427 |   }
4428 |   // add to this.cells
4429 |   if ( index === 0 ) {
4430 |     // prepend, add to start
4431 |     this.cells = cells.concat( this.cells );
4432 |   } else if ( isAppend ) {
4433 |     // append, add to end
4434 |     this.cells = this.cells.concat( cells );
4435 |   } else {
4436 |     // insert in this.cells
4437 |     var endCells = this.cells.splice( index, len - index );
4438 |     this.cells = this.cells.concat( cells ).concat( endCells );
4439 |   }
4440 | 
4441 |   this._sizeCells( cells );
4442 | 
4443 |   var selectedIndexDelta = index > this.selectedIndex ? 0 : cells.length;
4444 |   this._cellAddedRemoved( index, selectedIndexDelta );
4445 | };
4446 | 
4447 | Flickity.prototype.append = function( elems ) {
4448 |   this.insert( elems, this.cells.length );
4449 | };
4450 | 
4451 | Flickity.prototype.prepend = function( elems ) {
4452 |   this.insert( elems, 0 );
4453 | };
4454 | 
4455 | /**
4456 |  * Remove cells
4457 |  * @param {Element, Array, NodeList} elems
4458 |  */
4459 | Flickity.prototype.remove = function( elems ) {
4460 |   var cells = this.getCells( elems );
4461 |   var selectedIndexDelta = 0;
4462 |   var i, len, cell;
4463 |   // calculate selectedIndexDelta, easier if done in seperate loop
4464 |   for ( i=0, len = cells.length; i < len; i++ ) {
4465 |     cell = cells[i];
4466 |     var wasBefore = utils.indexOf( this.cells, cell ) < this.selectedIndex;
4467 |     selectedIndexDelta -= wasBefore ? 1 : 0;
4468 |   }
4469 | 
4470 |   for ( i=0, len = cells.length; i < len; i++ ) {
4471 |     cell = cells[i];
4472 |     cell.remove();
4473 |     // remove item from collection
4474 |     utils.removeFrom( this.cells, cell );
4475 |   }
4476 | 
4477 |   if ( cells.length ) {
4478 |     // update stuff
4479 |     this._cellAddedRemoved( 0, selectedIndexDelta );
4480 |   }
4481 | };
4482 | 
4483 | // updates when cells are added or removed
4484 | Flickity.prototype._cellAddedRemoved = function( changedCellIndex, selectedIndexDelta ) {
4485 |   selectedIndexDelta = selectedIndexDelta || 0;
4486 |   this.selectedIndex += selectedIndexDelta;
4487 |   this.selectedIndex = Math.max( 0, Math.min( this.cells.length - 1, this.selectedIndex ) );
4488 | 
4489 |   this.emitEvent( 'cellAddedRemoved', [ changedCellIndex, selectedIndexDelta ] );
4490 |   this.cellChange( changedCellIndex );
4491 | };
4492 | 
4493 | /**
4494 |  * logic to be run after a cell's size changes
4495 |  * @param {Element} elem - cell's element
4496 |  */
4497 | Flickity.prototype.cellSizeChange = function( elem ) {
4498 |   var cell = this.getCell( elem );
4499 |   if ( !cell ) {
4500 |     return;
4501 |   }
4502 |   cell.getSize();
4503 | 
4504 |   var index = utils.indexOf( this.cells, cell );
4505 |   this.cellChange( index );
4506 | };
4507 | 
4508 | /**
4509 |  * logic any time a cell is changed: added, removed, or size changed
4510 |  * @param {Integer} changedCellIndex - index of the changed cell, optional
4511 |  */
4512 | Flickity.prototype.cellChange = function( changedCellIndex ) {
4513 |   // TODO maybe always size all cells unless isSkippingSizing
4514 |   // size all cells if necessary
4515 |   // if ( !isSkippingSizing ) {
4516 |   //   this._sizeCells( this.cells );
4517 |   // }
4518 | 
4519 |   changedCellIndex = changedCellIndex || 0;
4520 | 
4521 |   this._positionCells( changedCellIndex );
4522 |   this._getWrapShiftCells();
4523 |   this.setGallerySize();
4524 |   // position slider
4525 |   if ( this.options.freeScroll ) {
4526 |     this.positionSlider();
4527 |   } else {
4528 |     this.positionSliderAtSelected();
4529 |     this.select( this.selectedIndex );
4530 |   }
4531 | };
4532 | 
4533 | // -----  ----- //
4534 | 
4535 | return Flickity;
4536 | 
4537 | }));
4538 | 
4539 | /**
4540 |  * Flickity index
4541 |  * used for AMD and CommonJS exports
4542 |  */
4543 | 
4544 | ( function( window, factory ) {
4545 |   
4546 |   // universal module definition
4547 | 
4548 |   if ( typeof define == 'function' && define.amd ) {
4549 |     // AMD
4550 |     define( 'flickity/js/index',[
4551 |       './flickity',
4552 |       './drag',
4553 |       './prev-next-button',
4554 |       './page-dots',
4555 |       './player',
4556 |       './add-remove-cell'
4557 |     ], factory );
4558 |   } else if ( typeof exports == 'object' ) {
4559 |     // CommonJS
4560 |     module.exports = factory(
4561 |       require('./flickity'),
4562 |       require('./drag'),
4563 |       require('./prev-next-button'),
4564 |       require('./page-dots'),
4565 |       require('./player'),
4566 |       require('./add-remove-cell')
4567 |     );
4568 |   }
4569 | 
4570 | })( window, function factory( Flickity ) {
4571 |   /*jshint strict: false*/
4572 |   return Flickity;
4573 | });
4574 | 
4575 | /*!
4576 |  * Flickity asNavFor v1.0.1
4577 |  * enable asNavFor for Flickity
4578 |  */
4579 | 
4580 | /*jshint browser: true, undef: true, unused: true, strict: true*/
4581 | 
4582 | ( function( window, factory ) {
4583 |   /*global define: false, module: false, require: false */
4584 |   
4585 |   // universal module definition
4586 | 
4587 |   if ( typeof define == 'function' && define.amd ) {
4588 |     // AMD
4589 |     define( 'flickity-as-nav-for/as-nav-for',[
4590 |       'classie/classie',
4591 |       'flickity/js/index',
4592 |       'fizzy-ui-utils/utils'
4593 |     ], function( classie, Flickity, utils ) {
4594 |       return factory( window, classie, Flickity, utils );
4595 |     });
4596 |   } else if ( typeof exports == 'object' ) {
4597 |     // CommonJS
4598 |     module.exports = factory(
4599 |       window,
4600 |       require('desandro-classie'),
4601 |       require('flickity'),
4602 |       require('fizzy-ui-utils')
4603 |     );
4604 |   } else {
4605 |     // browser global
4606 |     window.Flickity = factory(
4607 |       window,
4608 |       window.classie,
4609 |       window.Flickity,
4610 |       window.fizzyUIUtils
4611 |     );
4612 |   }
4613 | 
4614 | }( window, function factory( window, classie, Flickity, utils ) {
4615 | 
4616 | 
4617 | 
4618 | // -------------------------- asNavFor prototype -------------------------- //
4619 | 
4620 | // Flickity.defaults.asNavFor = null;
4621 | 
4622 | Flickity.createMethods.push('_createAsNavFor');
4623 | 
4624 | Flickity.prototype._createAsNavFor = function() {
4625 |   this.on( 'activate', this.activateAsNavFor );
4626 |   this.on( 'deactivate', this.deactivateAsNavFor );
4627 |   this.on( 'destroy', this.destroyAsNavFor );
4628 | 
4629 |   var asNavForOption = this.options.asNavFor;
4630 |   if ( !asNavForOption ) {
4631 |     return;
4632 |   }
4633 |   // HACK do async, give time for other flickity to be initalized
4634 |   var _this = this;
4635 |   setTimeout( function initNavCompanion() {
4636 |     _this.setNavCompanion( asNavForOption );
4637 |   });
4638 | };
4639 | 
4640 | Flickity.prototype.setNavCompanion = function( elem ) {
4641 |   elem = utils.getQueryElement( elem );
4642 |   var companion = Flickity.data( elem );
4643 |   // stop if no companion or companion is self
4644 |   if ( !companion || companion == this ) {
4645 |     return;
4646 |   }
4647 | 
4648 |   this.navCompanion = companion;
4649 |   // companion select
4650 |   var _this = this;
4651 |   this.onNavCompanionSelect = function() {
4652 |     _this.navCompanionSelect();
4653 |   };
4654 |   companion.on( 'cellSelect', this.onNavCompanionSelect );
4655 |   // click
4656 |   this.on( 'staticClick', this.onNavStaticClick );
4657 | 
4658 |   this.navCompanionSelect();
4659 | };
4660 | 
4661 | Flickity.prototype.navCompanionSelect = function() {
4662 |   if ( !this.navCompanion ) {
4663 |     return;
4664 |   }
4665 |   var index = this.navCompanion.selectedIndex;
4666 |   this.select( index );
4667 |   // set nav selected class
4668 |   this.removeNavSelectedElement();
4669 |   // stop if companion has more cells than this one
4670 |   if ( this.selectedIndex != index ) {
4671 |     return;
4672 |   }
4673 |   this.navSelectedElement = this.cells[ index ].element;
4674 |   classie.add( this.navSelectedElement, 'is-nav-selected' );
4675 | };
4676 | 
4677 | Flickity.prototype.activateAsNavFor = function() {
4678 |   this.navCompanionSelect();
4679 | };
4680 | 
4681 | Flickity.prototype.removeNavSelectedElement = function() {
4682 |   if ( !this.navSelectedElement ) {
4683 |     return;
4684 |   }
4685 |   classie.remove( this.navSelectedElement, 'is-nav-selected' );
4686 |   delete this.navSelectedElement;
4687 | };
4688 | 
4689 | Flickity.prototype.onNavStaticClick = function( event, pointer, cellElement, cellIndex ) {
4690 |   if ( typeof cellIndex == 'number' ) {
4691 |     this.navCompanion.select( cellIndex );
4692 |   }
4693 | };
4694 | 
4695 | Flickity.prototype.deactivateAsNavFor = function() {
4696 |   this.removeNavSelectedElement();
4697 | };
4698 | 
4699 | Flickity.prototype.destroyAsNavFor = function() {
4700 |   if ( !this.navCompanion ) {
4701 |     return;
4702 |   }
4703 |   this.navCompanion.off( 'cellSelect', this.onNavCompanionSelect );
4704 |   this.off( 'staticClick', this.onNavStaticClick );
4705 |   delete this.navCompanion;
4706 | };
4707 | 
4708 | // -----  ----- //
4709 | 
4710 | return Flickity;
4711 | 
4712 | }));
4713 | 
4714 | /*!
4715 |  * imagesLoaded v3.1.8
4716 |  * JavaScript is all like "You images are done yet or what?"
4717 |  * MIT License
4718 |  */
4719 | 
4720 | ( function( window, factory ) { 
4721 |   // universal module definition
4722 | 
4723 |   /*global define: false, module: false, require: false */
4724 | 
4725 |   if ( typeof define === 'function' && define.amd ) {
4726 |     // AMD
4727 |     define( 'imagesloaded/imagesloaded',[
4728 |       'eventEmitter/EventEmitter',
4729 |       'eventie/eventie'
4730 |     ], function( EventEmitter, eventie ) {
4731 |       return factory( window, EventEmitter, eventie );
4732 |     });
4733 |   } else if ( typeof exports === 'object' ) {
4734 |     // CommonJS
4735 |     module.exports = factory(
4736 |       window,
4737 |       require('wolfy87-eventemitter'),
4738 |       require('eventie')
4739 |     );
4740 |   } else {
4741 |     // browser global
4742 |     window.imagesLoaded = factory(
4743 |       window,
4744 |       window.EventEmitter,
4745 |       window.eventie
4746 |     );
4747 |   }
4748 | 
4749 | })( window,
4750 | 
4751 | // --------------------------  factory -------------------------- //
4752 | 
4753 | function factory( window, EventEmitter, eventie ) {
4754 | 
4755 | 
4756 | 
4757 | var $ = window.jQuery;
4758 | var console = window.console;
4759 | var hasConsole = typeof console !== 'undefined';
4760 | 
4761 | // -------------------------- helpers -------------------------- //
4762 | 
4763 | // extend objects
4764 | function extend( a, b ) {
4765 |   for ( var prop in b ) {
4766 |     a[ prop ] = b[ prop ];
4767 |   }
4768 |   return a;
4769 | }
4770 | 
4771 | var objToString = Object.prototype.toString;
4772 | function isArray( obj ) {
4773 |   return objToString.call( obj ) === '[object Array]';
4774 | }
4775 | 
4776 | // turn element or nodeList into an array
4777 | function makeArray( obj ) {
4778 |   var ary = [];
4779 |   if ( isArray( obj ) ) {
4780 |     // use object if already an array
4781 |     ary = obj;
4782 |   } else if ( typeof obj.length === 'number' ) {
4783 |     // convert nodeList to array
4784 |     for ( var i=0, len = obj.length; i < len; i++ ) {
4785 |       ary.push( obj[i] );
4786 |     }
4787 |   } else {
4788 |     // array of single index
4789 |     ary.push( obj );
4790 |   }
4791 |   return ary;
4792 | }
4793 | 
4794 |   // -------------------------- imagesLoaded -------------------------- //
4795 | 
4796 |   /**
4797 |    * @param {Array, Element, NodeList, String} elem
4798 |    * @param {Object or Function} options - if function, use as callback
4799 |    * @param {Function} onAlways - callback function
4800 |    */
4801 |   function ImagesLoaded( elem, options, onAlways ) {
4802 |     // coerce ImagesLoaded() without new, to be new ImagesLoaded()
4803 |     if ( !( this instanceof ImagesLoaded ) ) {
4804 |       return new ImagesLoaded( elem, options );
4805 |     }
4806 |     // use elem as selector string
4807 |     if ( typeof elem === 'string' ) {
4808 |       elem = document.querySelectorAll( elem );
4809 |     }
4810 | 
4811 |     this.elements = makeArray( elem );
4812 |     this.options = extend( {}, this.options );
4813 | 
4814 |     if ( typeof options === 'function' ) {
4815 |       onAlways = options;
4816 |     } else {
4817 |       extend( this.options, options );
4818 |     }
4819 | 
4820 |     if ( onAlways ) {
4821 |       this.on( 'always', onAlways );
4822 |     }
4823 | 
4824 |     this.getImages();
4825 | 
4826 |     if ( $ ) {
4827 |       // add jQuery Deferred object
4828 |       this.jqDeferred = new $.Deferred();
4829 |     }
4830 | 
4831 |     // HACK check async to allow time to bind listeners
4832 |     var _this = this;
4833 |     setTimeout( function() {
4834 |       _this.check();
4835 |     });
4836 |   }
4837 | 
4838 |   ImagesLoaded.prototype = new EventEmitter();
4839 | 
4840 |   ImagesLoaded.prototype.options = {};
4841 | 
4842 |   ImagesLoaded.prototype.getImages = function() {
4843 |     this.images = [];
4844 | 
4845 |     // filter & find items if we have an item selector
4846 |     for ( var i=0, len = this.elements.length; i < len; i++ ) {
4847 |       var elem = this.elements[i];
4848 |       // filter siblings
4849 |       if ( elem.nodeName === 'IMG' ) {
4850 |         this.addImage( elem );
4851 |       }
4852 |       // find children
4853 |       // no non-element nodes, #143
4854 |       var nodeType = elem.nodeType;
4855 |       if ( !nodeType || !( nodeType === 1 || nodeType === 9 || nodeType === 11 ) ) {
4856 |         continue;
4857 |       }
4858 |       var childElems = elem.querySelectorAll('img');
4859 |       // concat childElems to filterFound array
4860 |       for ( var j=0, jLen = childElems.length; j < jLen; j++ ) {
4861 |         var img = childElems[j];
4862 |         this.addImage( img );
4863 |       }
4864 |     }
4865 |   };
4866 | 
4867 |   /**
4868 |    * @param {Image} img
4869 |    */
4870 |   ImagesLoaded.prototype.addImage = function( img ) {
4871 |     var loadingImage = new LoadingImage( img );
4872 |     this.images.push( loadingImage );
4873 |   };
4874 | 
4875 |   ImagesLoaded.prototype.check = function() {
4876 |     var _this = this;
4877 |     var checkedCount = 0;
4878 |     var length = this.images.length;
4879 |     this.hasAnyBroken = false;
4880 |     // complete if no images
4881 |     if ( !length ) {
4882 |       this.complete();
4883 |       return;
4884 |     }
4885 | 
4886 |     function onConfirm( image, message ) {
4887 |       if ( _this.options.debug && hasConsole ) {
4888 |         console.log( 'confirm', image, message );
4889 |       }
4890 | 
4891 |       _this.progress( image );
4892 |       checkedCount++;
4893 |       if ( checkedCount === length ) {
4894 |         _this.complete();
4895 |       }
4896 |       return true; // bind once
4897 |     }
4898 | 
4899 |     for ( var i=0; i < length; i++ ) {
4900 |       var loadingImage = this.images[i];
4901 |       loadingImage.on( 'confirm', onConfirm );
4902 |       loadingImage.check();
4903 |     }
4904 |   };
4905 | 
4906 |   ImagesLoaded.prototype.progress = function( image ) {
4907 |     this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded;
4908 |     // HACK - Chrome triggers event before object properties have changed. #83
4909 |     var _this = this;
4910 |     setTimeout( function() {
4911 |       _this.emit( 'progress', _this, image );
4912 |       if ( _this.jqDeferred && _this.jqDeferred.notify ) {
4913 |         _this.jqDeferred.notify( _this, image );
4914 |       }
4915 |     });
4916 |   };
4917 | 
4918 |   ImagesLoaded.prototype.complete = function() {
4919 |     var eventName = this.hasAnyBroken ? 'fail' : 'done';
4920 |     this.isComplete = true;
4921 |     var _this = this;
4922 |     // HACK - another setTimeout so that confirm happens after progress
4923 |     setTimeout( function() {
4924 |       _this.emit( eventName, _this );
4925 |       _this.emit( 'always', _this );
4926 |       if ( _this.jqDeferred ) {
4927 |         var jqMethod = _this.hasAnyBroken ? 'reject' : 'resolve';
4928 |         _this.jqDeferred[ jqMethod ]( _this );
4929 |       }
4930 |     });
4931 |   };
4932 | 
4933 |   // -------------------------- jquery -------------------------- //
4934 | 
4935 |   if ( $ ) {
4936 |     $.fn.imagesLoaded = function( options, callback ) {
4937 |       var instance = new ImagesLoaded( this, options, callback );
4938 |       return instance.jqDeferred.promise( $(this) );
4939 |     };
4940 |   }
4941 | 
4942 | 
4943 |   // --------------------------  -------------------------- //
4944 | 
4945 |   function LoadingImage( img ) {
4946 |     this.img = img;
4947 |   }
4948 | 
4949 |   LoadingImage.prototype = new EventEmitter();
4950 | 
4951 |   LoadingImage.prototype.check = function() {
4952 |     // first check cached any previous images that have same src
4953 |     var resource = cache[ this.img.src ] || new Resource( this.img.src );
4954 |     if ( resource.isConfirmed ) {
4955 |       this.confirm( resource.isLoaded, 'cached was confirmed' );
4956 |       return;
4957 |     }
4958 | 
4959 |     // If complete is true and browser supports natural sizes,
4960 |     // try to check for image status manually.
4961 |     if ( this.img.complete && this.img.naturalWidth !== undefined ) {
4962 |       // report based on naturalWidth
4963 |       this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
4964 |       return;
4965 |     }
4966 | 
4967 |     // If none of the checks above matched, simulate loading on detached element.
4968 |     var _this = this;
4969 |     resource.on( 'confirm', function( resrc, message ) {
4970 |       _this.confirm( resrc.isLoaded, message );
4971 |       return true;
4972 |     });
4973 | 
4974 |     resource.check();
4975 |   };
4976 | 
4977 |   LoadingImage.prototype.confirm = function( isLoaded, message ) {
4978 |     this.isLoaded = isLoaded;
4979 |     this.emit( 'confirm', this, message );
4980 |   };
4981 | 
4982 |   // -------------------------- Resource -------------------------- //
4983 | 
4984 |   // Resource checks each src, only once
4985 |   // separate class from LoadingImage to prevent memory leaks. See #115
4986 | 
4987 |   var cache = {};
4988 | 
4989 |   function Resource( src ) {
4990 |     this.src = src;
4991 |     // add to cache
4992 |     cache[ src ] = this;
4993 |   }
4994 | 
4995 |   Resource.prototype = new EventEmitter();
4996 | 
4997 |   Resource.prototype.check = function() {
4998 |     // only trigger checking once
4999 |     if ( this.isChecked ) {
5000 |       return;
5001 |     }
5002 |     // simulate loading on detached element
5003 |     var proxyImage = new Image();
5004 |     eventie.bind( proxyImage, 'load', this );
5005 |     eventie.bind( proxyImage, 'error', this );
5006 |     proxyImage.src = this.src;
5007 |     // set flag
5008 |     this.isChecked = true;
5009 |   };
5010 | 
5011 |   // ----- events ----- //
5012 | 
5013 |   // trigger specified handler for event type
5014 |   Resource.prototype.handleEvent = function( event ) {
5015 |     var method = 'on' + event.type;
5016 |     if ( this[ method ] ) {
5017 |       this[ method ]( event );
5018 |     }
5019 |   };
5020 | 
5021 |   Resource.prototype.onload = function( event ) {
5022 |     this.confirm( true, 'onload' );
5023 |     this.unbindProxyEvents( event );
5024 |   };
5025 | 
5026 |   Resource.prototype.onerror = function( event ) {
5027 |     this.confirm( false, 'onerror' );
5028 |     this.unbindProxyEvents( event );
5029 |   };
5030 | 
5031 |   // ----- confirm ----- //
5032 | 
5033 |   Resource.prototype.confirm = function( isLoaded, message ) {
5034 |     this.isConfirmed = true;
5035 |     this.isLoaded = isLoaded;
5036 |     this.emit( 'confirm', this, message );
5037 |   };
5038 | 
5039 |   Resource.prototype.unbindProxyEvents = function( event ) {
5040 |     eventie.unbind( event.target, 'load', this );
5041 |     eventie.unbind( event.target, 'error', this );
5042 |   };
5043 | 
5044 |   // -----  ----- //
5045 | 
5046 |   return ImagesLoaded;
5047 | 
5048 | });
5049 | 
5050 | /*!
5051 |  * Flickity imagesLoaded v1.0.0
5052 |  * enables imagesLoaded option for Flickity
5053 |  */
5054 | 
5055 | /*jshint browser: true, strict: true, undef: true, unused: true */
5056 | 
5057 | ( function( window, factory ) {
5058 |   /*global define: false, module: false, require: false */
5059 |   
5060 |   // universal module definition
5061 | 
5062 |   if ( typeof define == 'function' && define.amd ) {
5063 |     // AMD
5064 |     define( [
5065 |       'flickity/js/index',
5066 |       'imagesloaded/imagesloaded'
5067 |     ], function( Flickity, imagesLoaded ) {
5068 |       return factory( window, Flickity, imagesLoaded );
5069 |     });
5070 |   } else if ( typeof exports == 'object' ) {
5071 |     // CommonJS
5072 |     module.exports = factory(
5073 |       window,
5074 |       require('flickity'),
5075 |       require('imagesloaded')
5076 |     );
5077 |   } else {
5078 |     // browser global
5079 |     window.Flickity = factory(
5080 |       window,
5081 |       window.Flickity,
5082 |       window.imagesLoaded
5083 |     );
5084 |   }
5085 | 
5086 | }( window, function factory( window, Flickity, imagesLoaded ) {
5087 | 
5088 | 
5089 | Flickity.createMethods.push('_createImagesLoaded');
5090 | 
5091 | Flickity.prototype._createImagesLoaded = function() {
5092 |   this.on( 'activate', this.imagesLoaded );
5093 | };
5094 | 
5095 | Flickity.prototype.imagesLoaded = function() {
5096 |   if ( !this.options.imagesLoaded ) {
5097 |     return;
5098 |   }
5099 |   var _this = this;
5100 |   function onImagesLoadedProgress( instance, image ) {
5101 |     var cell = _this.getParentCell( image.img );
5102 |     _this.cellSizeChange( cell && cell.element );
5103 |   }
5104 |   imagesLoaded( this.slider ).on( 'progress', onImagesLoadedProgress );
5105 | };
5106 | 
5107 | return Flickity;
5108 | 
5109 | }));
5110 | 


--------------------------------------------------------------------------------
/flickity/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>flickity</title>
 8 | 
 9 | <link rel="stylesheet" href="flickity.css" />
10 | <link rel="stylesheet" href="demo.css" />
11 | 
12 | </head>
13 | <body>
14 | 
15 | <h1>flickity</h1>
16 | 
17 | <h2>default</h2>
18 | 
19 | <div class="gallery js-flickity">
20 |   <div class="gallery-cell"></div>
21 |   <div class="gallery-cell"></div>
22 |   <div class="gallery-cell"></div>
23 |   <div class="gallery-cell"></div>
24 |   <div class="gallery-cell"></div>
25 | </div>
26 | 
27 | <h2>variable sizes</h2>
28 | 
29 | <div class="gallery gallery--variable-sizes js-flickity">
30 |   <div class="gallery-cell"></div>
31 |   <div class="gallery-cell"></div>
32 |   <div class="gallery-cell"></div>
33 |   <div class="gallery-cell"></div>
34 |   <div class="gallery-cell"></div>
35 | </div>
36 | 
37 | <h2>freeScroll</h2>
38 | 
39 | <div class="gallery js-flickity" data-flickity-options='{ "freeScroll": true }'>
40 |   <div class="gallery-cell"></div>
41 |   <div class="gallery-cell"></div>
42 |   <div class="gallery-cell"></div>
43 |   <div class="gallery-cell"></div>
44 |   <div class="gallery-cell"></div>
45 | </div>
46 | 
47 | <h2>freeScroll + wrapAround</h2>
48 | 
49 | <div class="gallery js-flickity" data-flickity-options='{ "freeScroll": true, "wrapAround": true }'>
50 |   <div class="gallery-cell"></div>
51 |   <div class="gallery-cell"></div>
52 |   <div class="gallery-cell"></div>
53 |   <div class="gallery-cell"></div>
54 |   <div class="gallery-cell"></div>
55 | </div>
56 | 
57 | <script src="flickity.pkgd.js"></script>
58 | 
59 | </body>
60 | </html>
61 | 


--------------------------------------------------------------------------------
/gravity-well/demo.js:
--------------------------------------------------------------------------------
  1 | // canvas
  2 | var canvas = document.querySelector('canvas');
  3 | var ctx = canvas.getContext('2d');
  4 | 
  5 | // get/set canvas size
  6 | var canvasWidth = canvas.width = window.innerWidth - 20;
  7 | var canvasHeight = canvas.height;
  8 | 
  9 | // particle properties
 10 | var positionX = 100;
 11 | var velocityX = 0;
 12 | var friction = 0.9;
 13 | var isDragging = false;
 14 | var dragPositionX = positionX;
 15 | var target = 400;
 16 | var targetBound = 200;
 17 | var gravityStrength = 3;
 18 | 
 19 | function animate() {
 20 |   update();
 21 |   render();
 22 |   requestAnimationFrame( animate );
 23 | }
 24 | 
 25 | animate();
 26 | 
 27 | function update() {
 28 |   applyGravity();
 29 |   applyDragForce();
 30 |   // integrate physics
 31 |   velocityX *= friction;
 32 |   positionX += velocityX;
 33 | }
 34 | 
 35 | function applyForce( force ) {
 36 |   velocityX += force;
 37 | }
 38 | 
 39 | function applyGravity() {
 40 |   var distance = target - positionX;
 41 |   // stop if in center of well
 42 |   // if ( Math.abs( distance )  < 5 ) {
 43 |   //   applyForce( -velocityX );
 44 |   //   return;
 45 |   // }
 46 |   var gravity =  ( 1 - Math.abs( distance / targetBound ) ) * Math.sign( distance);
 47 |   // limit at target
 48 |   gravity = Math.abs( distance ) > targetBound ? 0 : gravity;
 49 |   gravity *= gravityStrength;
 50 |   applyForce( gravity );
 51 | }
 52 | 
 53 | function applyDragForce() {
 54 |   if ( !isDragging ) {
 55 |     return;
 56 |   }
 57 |   var dragVelocity = dragPositionX - positionX;
 58 |   var dragForce = dragVelocity - velocityX;
 59 |   applyForce( dragForce );
 60 | }
 61 | 
 62 | function render() {
 63 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
 64 |   // render target
 65 |   ctx.fillStyle = 'hsla(210, 100%, 50%, 0.5)';
 66 |   circle( target, 200, targetBound, 'fill' );
 67 |   ctx.fillStyle = 'black';
 68 |   circle( target, 200, 10, 'fill' );
 69 |   // render particle
 70 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
 71 |   circle( positionX, 200, 25, 'fill' );
 72 | }
 73 | 
 74 | function circle( x, y, radius, render ) {
 75 |   ctx.beginPath();
 76 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
 77 |   ctx[ render ]();
 78 |   ctx.closePath();
 79 | }
 80 | 
 81 | // ----- mouse events ----- //
 82 | 
 83 | var mousedownX;
 84 | var dragStartPositionX;
 85 | 
 86 | document.addEventListener( 'mousedown', function( event ) {
 87 |   isDragging = true;
 88 |   mousedownX = event.pageX;
 89 |   dragStartPositionX = positionX;
 90 |   setDragPosition( event );
 91 |   window.addEventListener( 'mousemove', setDragPosition );
 92 |   window.addEventListener( 'mouseup', onMouseup );
 93 | });
 94 | 
 95 | function setDragPosition( event ) {
 96 |   var moveX = event.pageX - mousedownX;
 97 |   dragPositionX = dragStartPositionX + moveX;
 98 |   event.preventDefault();
 99 | }
100 | 
101 | function onMouseup() {
102 |   isDragging = false;
103 |   window.removeEventListener( 'mousemove', setDragPosition );
104 |   window.removeEventListener( 'mouseup', onMouseup );
105 | }
106 | 


--------------------------------------------------------------------------------
/gravity-well/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>gravity well</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>gravity well</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/live-basics/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | 
14 | function update() {
15 |   // integrate physics
16 |   // velocityX *= friction;
17 |   // positionX += velocityX;
18 | }
19 | 
20 | function animate() {
21 |   update();
22 |   render();
23 |   requestAnimationFrame( animate );
24 | }
25 | 
26 | animate();
27 | 
28 | function render() {
29 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
30 |   // render particle
31 |   ctx.fillStyle = 'red';
32 |   circle( positionX, 100, 25 );
33 | }
34 | 
35 | function circle( x, y, radius ) {
36 |   ctx.beginPath();
37 |   ctx.arc( positionX, 100, radius, 0, Math.PI * 2 );
38 |   ctx.fill();
39 |   ctx.closePath();
40 | }
41 | 


--------------------------------------------------------------------------------
/live-basics/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>live basics</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>live basics</h1>
20 | 
21 | <canvas width="800" height="400"></canvas>
22 | 
23 | <script src="demo.js"></script>
24 | 
25 | </body>
26 | </html>
27 | 


--------------------------------------------------------------------------------
/live-bounds/demo.js:
--------------------------------------------------------------------------------
  1 | // canvas
  2 | var canvas = document.querySelector('canvas');
  3 | var ctx = canvas.getContext('2d');
  4 | 
  5 | // get/set canvas size
  6 | var canvasWidth = canvas.width = window.innerWidth - 20;
  7 | var canvasHeight = canvas.height;
  8 | 
  9 | // particle properties
 10 | var positionX = 100;
 11 | var velocityX = 0;
 12 | var friction = 0.95;
 13 | var isDragging = false;
 14 | var dragPositionX = positionX;
 15 | var rightBound = 800;
 16 | var restX = positionX;
 17 | 
 18 | function animate() {
 19 |   update();
 20 |   render();
 21 |   requestAnimationFrame( animate );
 22 | }
 23 | 
 24 | animate();
 25 | 
 26 | function update() {
 27 |   applyRightBounceyBound();
 28 |   // applyRightRubberBandBound();
 29 |   applyDragForce();
 30 |   velocityX *= friction;
 31 |   positionX += velocityX;
 32 | }
 33 | 
 34 | function applyForce( force ) {
 35 |   velocityX += force;
 36 | }
 37 | 
 38 | function applyRightBounceyBound() {
 39 |   if ( isDragging || positionX < rightBound ) {
 40 |     return;
 41 |   }
 42 |   var distance = rightBound - this.positionX;
 43 |   var force = distance * 0.05;
 44 |   applyForce( force );
 45 | }
 46 | 
 47 | function applyRightRubberBandBound() {
 48 |   if ( isDragging || positionX < rightBound ) {
 49 |     return;
 50 |   }
 51 |   // bouncing past bound
 52 |   var distance = rightBound - this.positionX;
 53 |   var force = distance * 0.1;
 54 |   restX = positionX + ( velocityX + force ) * friction / ( 1 - friction );
 55 |   if ( restX > rightBound ) {
 56 |     applyForce( force );
 57 |     return;
 58 |   }
 59 |   // bounce back
 60 |   force = distance * 0.1 - velocityX * friction;
 61 |   applyForce( force );
 62 | 
 63 | }
 64 | 
 65 | function applyDragForce() {
 66 |   if ( !isDragging ) {
 67 |     return;
 68 |   }
 69 |   var dragVelocity = dragPositionX - positionX;
 70 |   var dragForce = dragVelocity - velocityX;
 71 |   applyForce( dragForce );
 72 | }
 73 | 
 74 | function render() {
 75 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
 76 |   // bound
 77 |   ctx.strokeStyle = '#444';
 78 |   ctx.lineWidth = 4;
 79 |   line( rightBound, 0, rightBound, 200 );
 80 |   // resting position
 81 |   ctx.fillStyle = 'hsla(150, 100%, 30%, 0.7)';
 82 |   circle( restX, 100, 15 );
 83 |   // render particle
 84 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
 85 |   circle( positionX, 100, 25 );
 86 | }
 87 | 
 88 | function circle( x, y, radius ) {
 89 |   ctx.beginPath();
 90 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
 91 |   ctx.fill();
 92 |   ctx.closePath();
 93 | }
 94 | 
 95 | function line( ax, ay, bx, by ) {
 96 |   ctx.beginPath();
 97 |   ctx.moveTo( ax, ay );
 98 |   ctx.lineTo( bx, by );
 99 |   ctx.stroke();
100 |   ctx.closePath();
101 | }
102 | 
103 | // ----- mouse events ----- //
104 | 
105 | var mousedownX;
106 | var dragStartPositionX;
107 | 
108 | document.addEventListener( 'mousedown', function( event ) {
109 |   isDragging = true;
110 |   mousedownX = event.pageX;
111 |   dragStartPositionX = positionX;
112 |   setDragPosition( event );
113 |   window.addEventListener( 'mousemove', setDragPosition );
114 |   window.addEventListener( 'mouseup', onMouseup );
115 | });
116 | 
117 | function setDragPosition( event ) {
118 |   var moveX = event.pageX - mousedownX;
119 |   dragPositionX = dragStartPositionX + moveX;
120 |   event.preventDefault();
121 | }
122 | 
123 | function onMouseup() {
124 |   isDragging = false;
125 | 
126 |   restX = positionX + velocityX * friction / ( 1 - friction );
127 |   window.removeEventListener( 'mousemove', setDragPosition );
128 |   window.removeEventListener( 'mouseup', onMouseup );
129 | }
130 | 


--------------------------------------------------------------------------------
/live-bounds/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>live bounds</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>live bounds</h1>
20 | 
21 | <canvas width="800" height="400"></canvas>
22 | 
23 | <script src="demo.js"></script>
24 | 
25 | </body>
26 | </html>
27 | 


--------------------------------------------------------------------------------
/live-drag/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | var isDragging = false;
14 | var dragPositionX = positionX;
15 | 
16 | function animate() {
17 |   update();
18 |   render();
19 |   requestAnimationFrame( animate );
20 | }
21 | 
22 | animate();
23 | 
24 | function update() {
25 |   positionX = dragPositionX;
26 |   // applyDragForce();
27 |   // velocityX *= friction;
28 |   // positionX += velocityX;
29 | }
30 | 
31 | function applyForce( force ) {
32 |   velocityX += force;
33 | }
34 | 
35 | function applyDragForce() {
36 |   if ( !isDragging ) {
37 |     return;
38 |   }
39 |   var dragVelocity = dragPositionX - positionX;
40 |   velocityX = dragVelocity;
41 |   // var dragForce = dragVelocity - velocityX;
42 |   // applyForce( dragForce );
43 | }
44 | 
45 | function render() {
46 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
47 |   // render particle
48 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
49 |   circle( positionX, 100, 25, 'fill' );
50 | }
51 | 
52 | function circle( x, y, radius, render ) {
53 |   ctx.beginPath();
54 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
55 |   ctx[ render ]();
56 |   ctx.closePath();
57 | }
58 | 
59 | // ----- mouse events ----- //
60 | 
61 | var mousedownX;
62 | var dragStartPositionX;
63 | 
64 | document.addEventListener( 'mousedown', function( event ) {
65 |   isDragging = true;
66 |   mousedownX = event.pageX;
67 |   dragStartPositionX = positionX;
68 |   setDragPosition( event );
69 |   window.addEventListener( 'mousemove', setDragPosition );
70 |   window.addEventListener( 'mouseup', onMouseup );
71 | });
72 | 
73 | function setDragPosition( event ) {
74 |   var moveX = event.pageX - mousedownX;
75 |   dragPositionX = dragStartPositionX + moveX;
76 |   event.preventDefault();
77 | }
78 | 
79 | function onMouseup() {
80 |   isDragging = false;
81 |   window.removeEventListener( 'mousemove', setDragPosition );
82 |   window.removeEventListener( 'mouseup', onMouseup );
83 | }
84 | 


--------------------------------------------------------------------------------
/live-drag/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>live drag</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>live drag</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/photo-scroller/demo.js:
--------------------------------------------------------------------------------
  1 | // ----- Particle ----- //
  2 | 
  3 | var photoElem;
  4 | var positionX = 0;
  5 | var dragPositionX = 0;
  6 | var velocityX = 0;
  7 | var friction = 0.95;
  8 | var isDragging = false;
  9 | 
 10 | var rightBound, leftBound;
 11 | 
 12 | function update() {
 13 |   applyDragForce();
 14 |   applyBoundForce( rightBound, true );
 15 |   applyBoundForce( leftBound, false );
 16 |   integrate();
 17 | }
 18 | 
 19 | function integrate() {
 20 |   velocityX *= friction;
 21 |   positionX += velocityX;
 22 | }
 23 | 
 24 | function applyForce( force ) {
 25 |   velocityX += force;
 26 | }
 27 | 
 28 | function applyDragForce() {
 29 |   if ( !isDragging ) {
 30 |     return;
 31 |   }
 32 |   // change the position to drag position by applying force to velocity
 33 |   var dragVelocity = dragPositionX - positionX;
 34 |   var dragForce = dragVelocity - velocityX;
 35 |   applyForce( dragForce );
 36 | }
 37 | 
 38 | function applyBoundForce( bound, isForward ) {
 39 |   var isInside = isForward ? positionX < bound : positionX > bound;
 40 |   if ( isDragging || isInside ) {
 41 |     return;
 42 |   }
 43 |   // bouncing past bound
 44 |   var distance = bound - positionX;
 45 |   var force = distance * 0.1;
 46 |   var restX = positionX + ( velocityX + force ) * friction / ( 1 - friction );
 47 |   var isRestOutside = isForward ? restX > bound : restX < bound;
 48 |   if ( isRestOutside ) {
 49 |     applyForce( force );
 50 |     return;
 51 |   }
 52 |   // bounce back
 53 |   force = distance * 0.1 - this.velocityX;
 54 |   applyForce( force );
 55 | }
 56 | 
 57 | function render() {
 58 |   photoElem.style.transform = 'translateX(' + (this.positionX ) + 'px)';
 59 | }
 60 | 
 61 | // ----- init ----- //
 62 | 
 63 | // create particle
 64 | photoElem = document.querySelector('img');
 65 | // set bounds
 66 | rightBound = 0;
 67 | leftBound = window.innerWidth - 2000; // 2000 = img width
 68 | 
 69 | document.body.addEventListener( 'mousedown', onMousedown, false );
 70 | 
 71 | function animate() {
 72 |   update();
 73 |   render();
 74 |   requestAnimationFrame( animate );
 75 | }
 76 | // start animation
 77 | animate();
 78 | 
 79 | // ----- mouse events ----- //
 80 | 
 81 | var dragStartX;
 82 | var particleDragStartX;
 83 | 
 84 | function onMousedown( event ) {
 85 |   event.preventDefault();
 86 |   // get drag start positions
 87 |   dragStartX = event.pageX;
 88 |   particleDragStartX = positionX;
 89 |   isDragging = true;
 90 |   setDragPositionX( event );
 91 |   window.addEventListener( 'mousemove', onMousemove, false );
 92 |   window.addEventListener( 'mouseup', onMouseup, false );
 93 | }
 94 | 
 95 | function onMousemove( event ) {
 96 |   setDragPositionX( event );
 97 | }
 98 | 
 99 | function setDragPositionX( event ) {
100 |   var moveX = event.pageX - dragStartX;
101 |   // set dragPosition
102 |   dragPositionX = particleDragStartX + moveX;
103 | }
104 | 
105 | // stop dragging
106 | function onMouseup() {
107 |   isDragging = false;
108 |   window.removeEventListener( 'mousemove', onMousemove, false );
109 |   window.removeEventListener( 'mouseup', onMouseup, false );
110 | }
111 | 


--------------------------------------------------------------------------------
/photo-scroller/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 |   <meta charset="utf-8" />
 5 |   <meta name="viewport" content="width=device-width" />
 6 | 
 7 |   <title>photo scroller</title>
 8 | 
 9 |   <style>
10 |   html {
11 |     overflow: hidden;
12 |   }
13 | 
14 |   body {
15 |     min-height: 600px;
16 |   }
17 | 
18 |   img {
19 |     display: block;
20 |     position: absolute;
21 |     left: 0;
22 |     top: 0;
23 |   }
24 | 
25 |   </style>
26 | 
27 | </head>
28 | <body>
29 | 
30 | <img src="van.jpg" />
31 | 
32 | <script src="demo.js"></script>
33 | 
34 | </body>
35 | </html>
36 | 


--------------------------------------------------------------------------------
/photo-scroller/van.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/desandro/practical-ui-physics/9888c8b625c479d3e7d246cd66080d6cb2ddf465/photo-scroller/van.jpg


--------------------------------------------------------------------------------
/resting-position/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | var isDragging = false;
14 | var dragPositionX = positionX;
15 | var restX = positionX;
16 | 
17 | function animate() {
18 |   update();
19 |   render();
20 |   requestAnimationFrame( animate );
21 | }
22 | 
23 | animate();
24 | 
25 | function update() {
26 |   applyDragForce();
27 |   velocityX *= friction;
28 |   positionX += velocityX;
29 | }
30 | 
31 | function applyForce( force ) {
32 |   velocityX += force;
33 | }
34 | 
35 | function applyDragForce() {
36 |   if ( !isDragging ) {
37 |     return;
38 |   }
39 |   var dragVelocity = dragPositionX - positionX;
40 |   var dragForce = dragVelocity - velocityX;
41 |   applyForce( dragForce );
42 | }
43 | 
44 | function render() {
45 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
46 |   // resting position
47 |   ctx.fillStyle = 'hsla(150, 100%, 30%, 0.7)';
48 |   circle( restX, 100, 25 );
49 |   // render particle
50 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
51 |   circle( positionX, 100, 25 );
52 | }
53 | 
54 | function circle( x, y, radius ) {
55 |   ctx.beginPath();
56 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
57 |   ctx.fill();
58 |   ctx.closePath();
59 | }
60 | 
61 | // ----- mouse events ----- //
62 | 
63 | var mousedownX;
64 | var dragStartPositionX;
65 | 
66 | document.addEventListener( 'mousedown', function( event ) {
67 |   isDragging = true;
68 |   mousedownX = event.pageX;
69 |   dragStartPositionX = positionX;
70 |   setDragPosition( event );
71 |   window.addEventListener( 'mousemove', setDragPosition );
72 |   window.addEventListener( 'mouseup', onMouseup );
73 | });
74 | 
75 | function setDragPosition( event ) {
76 |   var moveX = event.pageX - mousedownX;
77 |   dragPositionX = dragStartPositionX + moveX;
78 |   event.preventDefault();
79 | }
80 | 
81 | function onMouseup() {
82 |   isDragging = false;
83 |   restX = positionX + velocityX * friction / ( 1 - friction  );
84 |   window.removeEventListener( 'mousemove', setDragPosition );
85 |   window.removeEventListener( 'mouseup', onMouseup );
86 | }
87 | 


--------------------------------------------------------------------------------
/resting-position/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>resting position</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>resting position</h1>
20 | 
21 | <p>Drag particle</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/rubber-band-bounds/demo.js:
--------------------------------------------------------------------------------
  1 | // canvas
  2 | var canvas = document.querySelector('canvas');
  3 | var ctx = canvas.getContext('2d');
  4 | 
  5 | // get/set canvas size
  6 | var canvasWidth = canvas.width = window.innerWidth - 20;
  7 | var canvasHeight = canvas.height;
  8 | 
  9 | // particle properties
 10 | var positionX = 100;
 11 | var velocityX = 0;
 12 | var friction = 0.95;
 13 | var isDragging = false;
 14 | var dragPositionX = positionX;
 15 | var rightBound = 800;
 16 | 
 17 | function animate() {
 18 |   update();
 19 |   render();
 20 |   requestAnimationFrame( animate );
 21 | }
 22 | 
 23 | animate();
 24 | 
 25 | function update() {
 26 |   applyRightBoundForce();
 27 |   applyDragForce();
 28 |   velocityX *= friction;
 29 |   positionX += velocityX;
 30 | }
 31 | 
 32 | function applyForce( force ) {
 33 |   velocityX += force;
 34 | }
 35 | 
 36 | function applyRightBoundForce() {
 37 |   if ( isDragging || positionX < rightBound ) {
 38 |     return;
 39 |   }
 40 |   // bouncing past bound
 41 |   var distance = rightBound - this.positionX;
 42 |   var force = distance * 0.1;
 43 |   // calculate resting position with this force
 44 |   var restX = positionX + ( velocityX + force ) / ( 1 - friction );
 45 |   // apply force if resting position is out of bounds
 46 |   if ( restX > rightBound ) {
 47 |     applyForce( force );
 48 |     return;
 49 |   }
 50 |   // if in bounds, apply force to align at bounds
 51 |   force = distance * 0.1 - velocityX;
 52 |   applyForce( force );
 53 | }
 54 | 
 55 | function applyDragForce() {
 56 |   if ( !isDragging ) {
 57 |     return;
 58 |   }
 59 |   var dragVelocity = dragPositionX - positionX;
 60 |   var dragForce = dragVelocity - velocityX;
 61 |   applyForce( dragForce );
 62 | }
 63 | 
 64 | function render() {
 65 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
 66 |   // bound
 67 |   ctx.strokeStyle = '#444';
 68 |   ctx.lineWidth = 4;
 69 |   line( rightBound, 0, rightBound, 200 );
 70 |   // render particle
 71 |   ctx.fillStyle = 'hsla(0, 100%, 50%, 0.7)';
 72 |   circle( positionX, 100, 25, 'fill' );
 73 | }
 74 | 
 75 | function circle( x, y, radius, render ) {
 76 |   ctx.beginPath();
 77 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
 78 |   ctx[ render ]();
 79 |   ctx.closePath();
 80 | }
 81 | 
 82 | function line( ax, ay, bx, by ) {
 83 |   ctx.beginPath();
 84 |   ctx.moveTo( ax, ay );
 85 |   ctx.lineTo( bx, by );
 86 |   ctx.stroke();
 87 |   ctx.closePath();
 88 | }
 89 | 
 90 | // ----- mouse events ----- //
 91 | 
 92 | var mousedownX;
 93 | var dragStartPositionX;
 94 | 
 95 | document.addEventListener( 'mousedown', function( event ) {
 96 |   isDragging = true;
 97 |   mousedownX = event.pageX;
 98 |   dragStartPositionX = positionX;
 99 |   setDragPosition( event );
100 |   window.addEventListener( 'mousemove', setDragPosition );
101 |   window.addEventListener( 'mouseup', onMouseup );
102 | });
103 | 
104 | function setDragPosition( event ) {
105 |   var moveX = event.pageX - mousedownX;
106 |   dragPositionX = dragStartPositionX + moveX;
107 |   event.preventDefault();
108 | }
109 | 
110 | function onMouseup() {
111 |   isDragging = false;
112 |   window.removeEventListener( 'mousemove', setDragPosition );
113 |   window.removeEventListener( 'mouseup', onMouseup );
114 | }
115 | 


--------------------------------------------------------------------------------
/rubber-band-bounds/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>rubber band bounds</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>rubber band bounds</h1>
20 | 
21 | <p>Flick particle past bound</p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


--------------------------------------------------------------------------------
/step-graphs/graph-bg.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/desandro/practical-ui-physics/9888c8b625c479d3e7d246cd66080d6cb2ddf465/step-graphs/graph-bg.png


--------------------------------------------------------------------------------
/step-graphs/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 |   <meta charset="utf-8" />
 5 |   <meta name="viewport" content="width=device-width" />
 6 | 
 7 |   <title>step graphs</title>
 8 | 
 9 |   <style>
10 |   body {
11 |     font-family: sans-serif;
12 |     font-size: 24px;
13 |   }
14 | 
15 |   .graph {
16 |     margin-bottom: 60px;
17 |     opacity: 0.2;
18 |   }
19 | 
20 |   .graph--canvas {
21 |     background: url('graph-bg.png');
22 |     opacity: 0;
23 |   }
24 | 
25 |   .graph.is-visible .graph--canvas,
26 |   .graph.is-visible {
27 |     opacity: 1;
28 |   }
29 |   
30 |   .graph--title {
31 |     font-size: 40px;
32 |     margin-bottom: 20px;
33 |   }
34 |   </style>
35 | 
36 | </head>
37 | <body>
38 | 
39 | <div class="graph">
40 |   <h3 class="graph--title">velocity = 1</h3>
41 |   <canvas class="graph--canvas" width="1201" height="202" data-velocity="1"></canvas>
42 | </div>
43 | 
44 | <div class="graph">
45 |   <h3 class="graph--title">velocity = 0.5</h3>
46 |   <canvas class="graph--canvas" width="1201" height="202" data-velocity="0.5"></canvas>
47 | </div>
48 | 
49 | <div class="graph">
50 |   <h3 class="graph--title">velocity = 2</h3>
51 |   <canvas class="graph--canvas" width="1201" height="202" data-velocity="2"></canvas>
52 | </div>
53 | 
54 | <div class="graph">
55 |   <h3 class="graph--title">velocity = 2; friction = 0.8</h3>
56 |   <canvas class="graph--canvas" width="1201" height="202" data-velocity="2" data-friction="0.8"></canvas>
57 | </div>
58 | 
59 | <div class="graph">
60 |   <h3 class="graph--title">velocity = 2; friction = 0.5</h3>
61 |   <canvas class="graph--canvas" width="1201" height="202" data-velocity="2" data-friction="0.5"></canvas>
62 | </div>
63 | 
64 | <div class="graph">
65 |   <h3 class="graph--title">force = 0.5</h3>
66 |   <canvas class="graph--canvas" width="1201" height="202" data-force="0.5"></canvas>
67 | </div>
68 | 
69 | <div class="graph">
70 |   <h3 class="graph--title">force = 0.2</h3>
71 |   <canvas class="graph--canvas" width="1201" height="202" data-force="0.2"></canvas>
72 | </div>
73 | 
74 | 
75 | <script src="step-graphs.js"></script>
76 | 
77 | </body>
78 | </html>
79 | 


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/step-graphs/step-graphs.js:
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 1 | // --------------------------  -------------------------- //
 2 | 
 3 | var step = 0;
 4 | var stepsCount = 6;
 5 | var delay = 500; // milliseconds
 6 | var blockSize = 100;
 7 | 
 8 | // --------------------------  -------------------------- //
 9 | 
10 | function StepGraph( canvas ) {
11 |   this.canvas = canvas;
12 |   this.canvasWidth = canvas.width;
13 |   this.canvasHeight = canvas.height;
14 |   this.ctx = canvas.getContext('2d');
15 |   this.velocity = parseFloat( canvas.getAttribute('data-velocity') || 0 );
16 |   this.friction = parseFloat( canvas.getAttribute('data-friction') || 1 );
17 |   this.force = parseFloat( canvas.getAttribute('data-force') || 0 );
18 | 
19 |   this.render();
20 | }
21 | 
22 | StepGraph.prototype.render = function() {
23 |   var ctx = this.ctx;
24 |   ctx.clearRect( 0, 0, this.canvasWidth, this.canvasHeight );
25 | 
26 |   this.previousX = step === 0 ? 1 : this.x || 1;
27 | 
28 |   var x;
29 |   for ( var i=0; i <= step; i++ ) {
30 |     var prevX = x || 1;
31 |     var velocity = i === 0 ? this.velocity : ( velocity + this.force ) * this.friction;
32 |     x = i === 0 ? 1 : x + velocity;
33 | 
34 | 
35 |     ctx.fillStyle = i == step ? 'hsla(0, 100%, 50%, 1)' : 'hsla(0, 100%, 50%, 0.3)' ;
36 |     circle( ctx, x * blockSize, blockSize, blockSize * 0.4 );
37 | 
38 |     if ( i > 0 ) {
39 |       var distance = x - prevX;
40 |       ctx.font = '28px sans-serif';
41 |       ctx.fillStyle = i == step ? 'hsla(0, 0%, 20%, 1)' : 'hsla(0, 0%, 20%, 0.2)';
42 |       var text = '+' + Math.round( distance * 10 ) / 10;
43 |       ctx.fillText( text, (x + prevX) * 0.5 * blockSize - 14, blockSize * 1.75 );
44 |     }
45 |   }
46 | 
47 |   this.x = x;
48 | };
49 | 
50 | function circle( ctx, x, y, radius ) {
51 |   ctx.beginPath();
52 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
53 |   ctx.fill();
54 |   ctx.closePath();
55 | }
56 | 
57 | // --------------------------  -------------------------- //
58 | 
59 | var canvases = document.querySelectorAll('.graph--canvas');
60 | 
61 | var graphs = [];
62 | 
63 | for ( var i=0, len = canvases.length; i < len; i++ ) {
64 |   var graph = new StepGraph( canvases[i] );
65 |   graphs.push( graph );
66 | }
67 | 
68 | setInterval( function() {
69 |   step++;
70 |   step = step % stepsCount;
71 |   for ( var i=0, len = graphs.length; i < len; i++ ) {
72 |     graphs[i].render();
73 |   }
74 | }, delay );
75 | 
76 | ( function() {
77 |   var graphElems = document.querySelectorAll('.graph');
78 |   for ( var i=0, len = graphElems.length; i < len; i++ ) {
79 |     var graphElem = graphElems[i];
80 |     var onClick = getOnClick( graphElem );
81 |     graphElem.addEventListener( 'click', onClick, false );
82 |   }
83 | 
84 |   function getOnClick( graphElem ) {
85 |     return function() {
86 |       graphElem.className += ' is-visible';
87 |     }
88 |   }
89 | })();
90 | 


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/wind/demo.js:
--------------------------------------------------------------------------------
 1 | // canvas
 2 | var canvas = document.querySelector('canvas');
 3 | var ctx = canvas.getContext('2d');
 4 | 
 5 | // get/set canvas size
 6 | var canvasWidth = canvas.width = window.innerWidth - 20;
 7 | var canvasHeight = canvas.height;
 8 | 
 9 | // particle properties
10 | var positionX = 100;
11 | var velocityX = 0;
12 | var friction = 0.95;
13 | var wind = 0;
14 | 
15 | function animate() {
16 |   update();
17 |   render();
18 |   requestAnimationFrame( animate );
19 | }
20 | 
21 | animate();
22 | 
23 | function update() {
24 |   applyForce( wind );
25 |   velocityX *= friction;
26 |   positionX += velocityX;
27 | }
28 | 
29 | function applyForce( force ) {
30 |   velocityX += force;
31 | }
32 | 
33 | function render() {
34 |   ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
35 |   // render particle
36 |   ctx.fillStyle = 'red';
37 |   circle( positionX, 100, 25 );
38 | }
39 | 
40 | function circle( x, y, radius ) {
41 |   ctx.beginPath();
42 |   ctx.arc( x, y, radius, 0, Math.PI * 2 );
43 |   ctx.fill();
44 |   ctx.closePath();
45 | }
46 | 


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/wind/index.html:
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 1 | <!doctype html>
 2 | <html>
 3 | <head>
 4 | <meta charset="utf-8" />
 5 | <meta name="viewport" content="width=device-width" />
 6 | 
 7 | <title>wind</title>
 8 | 
 9 | <style>
10 | body {
11 |   font-family: sans-serif;
12 |   margin: 0;
13 | }
14 | </style>
15 | 
16 | </head>
17 | <body>
18 | 
19 | <h1>wind</h1>
20 | 
21 | <p>Change <code>wind</code></p>
22 | 
23 | <canvas width="800" height="400"></canvas>
24 | 
25 | <script src="demo.js"></script>
26 | 
27 | </body>
28 | </html>
29 | 


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