├── .babelrc
├── .coveralls.yml
├── .gitignore
├── .travis.yml
├── LICENSE
├── README.md
├── config
    ├── karma.conf.js
    ├── webpack.dev.config.js
    └── webpack.prod.config.js
├── demo.gif
├── dist
    ├── VueLazyImages.js
    └── example.js
├── example
    ├── index.html
    ├── index.js
    └── loading.gif
├── package-lock.json
├── package.json
├── src
    ├── LazyImage.js
    ├── VueLazyImage.vue
    ├── index.js
    └── utils.js
└── test
    ├── LazyImage.spec.js
    ├── tools.js
    └── utils.spec.js


/.babelrc:
--------------------------------------------------------------------------------
1 | {
2 |   "presets": ["es2015","stage-0"]
3 | }
4 | 


--------------------------------------------------------------------------------
/.coveralls.yml:
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1 | service_name: travis-ci
2 | repo_token: GbifEcSbUl0kkaHRMAn8IGDRm1ADRL0KE


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | /node_modules
2 | /.idea
3 | /coverage


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/.travis.yml:
--------------------------------------------------------------------------------
 1 | language: node_js
 2 | node_js:
 3 |   - "6.4.0"
 4 | cache:
 5 |   directories:
 6 |     - node_modules
 7 | before_install:
 8 |     - npm install
 9 | script:
10 |   - npm run test
11 |   - npm run build
12 | after_script:
13 |   - npm run coverage


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2017 LowesYang
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
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 1 | # vue-lazyload-images
 2 | [![npm](https://img.shields.io/badge/npm-v1.4.6-green.svg)](https://www.npmjs.com/package/vue-lazy-images)
 3 | [![Build Status](https://travis-ci.org/yyh1102/vue-lazyload-images.svg?branch=master)](https://travis-ci.org/yyh1102/vue-lazyload-images)
 4 | [![Coverage Status](https://coveralls.io/repos/github/yyh1102/vue-lazyload-images/badge.svg)](https://coveralls.io/github/yyh1102/vue-lazyload-images)
 5 | [![npm](https://img.shields.io/npm/l/express.svg)](https://opensource.org/licenses/mit-license.php)
 6 | 
 7 | A plugin of lazy-load images for Vue2.x
 8 | 
 9 | Support images lazyload in window or build-in element.
10 | 
11 | ## Demo
12 | ![Demo](https://github.com/yyh1102/vue-lazylaod-images/blob/master/demo.gif)
13 | 
14 | ## Installation
15 | ### npm
16 | ```
17 | $ npm install vue-lazy-images
18 | ```
19 | or 
20 | ### script
21 | ```html
22 | <script src="dist/VueLazyImages.js"></script>
23 | ```
24 | 
25 | ## Usage
26 | Entry.js
27 | ```javascript
28 | import Vue from "vue"
29 | import VueLazyImage from "vue-lazy-images";
30 | Vue.use(VueLazyImage)
31 | ```
32 | 
33 | Template
34 | ```html
35 | <lazy-image 
36 |     :src='url'
37 |     :img-class='string'  //or :img-class="['classname1','classname2']"
38 |     :placeholder='url of placeholder or loading image'  
39 | />
40 | ```
41 | 
42 | ## Options
43 | ```Vue.use(VueLazyImage,options)```
44 | 
45 | | key | description | default | type |
46 | |:----|:------------|:--------|:-----|
47 | | offset | offset distance for pre-loading | 0 | Number |
48 | | events | events that you want parentNode listen for | ['scroll', 'wheel', 'mousewheel', 'resize', 'animationend', 'transitionend', 'touchmove'] | Array |
49 | | throttle | spacing interval of continuous calling | 0(ms) | Number | 
50 | | debounce | idle time between two actions | 0(ms) | Number |
51 | 


--------------------------------------------------------------------------------
/config/karma.conf.js:
--------------------------------------------------------------------------------
 1 | // Karma configuration
 2 | // Generated on Wed May 24 2017 23:11:10 GMT+0800 (中国标准时间)
 3 | 
 4 | module.exports = function(config) {
 5 |   config.set({
 6 | 
 7 |     // base path that will be used to resolve all patterns (eg. files, exclude)
 8 |     basePath: '../',
 9 | 
10 | 
11 |     // frameworks to use
12 |     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
13 |     frameworks: ['mocha','chai'],
14 | 
15 | 
16 |     // list of files / patterns to load in the browser
17 |     files: [
18 |       'node_modules/babel-polyfill/dist/polyfill.min.js', // ES6 compatibility
19 |       'test/**/*.spec.js',
20 |     ],
21 | 
22 | 
23 |     // list of files to exclude
24 |     exclude: [
25 |     ],
26 | 
27 | 
28 |     // preprocess matching files before serving them to the browser
29 |     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
30 |     preprocessors: {
31 |       'test/**/*.spec.js': ['webpack']
32 |     },
33 | 
34 | 
35 |     // test results reporter to use
36 |     // possible values: 'dots', 'progress'
37 |     // available reporters: https://npmjs.org/browse/keyword/karma-reporter
38 |     reporters: ['progress','coverage','coveralls'],
39 | 
40 |     coverageReporter: {
41 |         type: 'lcov', // lcov or lcovonly are required for generating lcov.info files
42 |         dir: 'coverage/'
43 |     },
44 | 
45 |     // web server port
46 |     port: 9876,
47 | 
48 | 
49 |     // enable / disable colors in the output (reporters and logs)
50 |     colors: true,
51 | 
52 | 
53 |     // level of logging
54 |     // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
55 |     logLevel: config.LOG_INFO,
56 | 
57 | 
58 |     // enable / disable watching file and executing tests whenever any file changes
59 |     autoWatch: true,
60 | 
61 | 
62 |     // start these browsers
63 |     // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
64 |     browsers: ['PhantomJS'],
65 | 
66 | 
67 |     // Continuous Integration mode
68 |     // if true, Karma captures browsers, runs the tests and exits
69 |     singleRun: false,
70 | 
71 |     // Concurrency level
72 |     // how many browser should be started simultaneous
73 |     concurrency: Infinity,
74 |     webpack: {
75 |       module: {
76 |         rules: [
77 |           {
78 |             test: /\.js$/,
79 |             loader: 'babel-loader',
80 |             exclude: /node_modules/,
81 |               query:{
82 |                 plugins:['istanbul']
83 |               }
84 |           },
85 |           {
86 |               test:/\.vue$/,
87 |               use:'vue-loader'
88 |           }
89 |         ]
90 |       }
91 |     }
92 |   })
93 | }
94 | 


--------------------------------------------------------------------------------
/config/webpack.dev.config.js:
--------------------------------------------------------------------------------
 1 | var webpack=require("webpack");
 2 | var path=require("path");
 3 | 
 4 | module.exports={
 5 |     entry: {
 6 |         example:'./example/index'
 7 |     },
 8 |     output:{
 9 |         libraryTarget:'umd',
10 |         library:'[name]',
11 |         path:path.resolve(__dirname,'..','dist'),
12 |         publicPath:'/dist/',
13 |         filename:'[name].js',
14 |     },
15 |     module:{
16 |         rules:[
17 |             {
18 |                 test:/\.js[x]?$/,
19 |                 use:'babel-loader',
20 |                 exclude:/node_modules/
21 |             },
22 |             {
23 |                 test:/\.vue$/,
24 |                 use:'vue-loader'
25 |             }
26 |         ]
27 |     },
28 |     resolve:{
29 |         extensions:['.js','.jsx'],
30 |         alias:{
31 |             'vue$':'vue/dist/vue.min.js'
32 |         }
33 |     },
34 |     plugins:[]
35 | }


--------------------------------------------------------------------------------
/config/webpack.prod.config.js:
--------------------------------------------------------------------------------
 1 | var webpack = require("webpack");
 2 | var pack = require("../package.json");
 3 | var webpackDevConfig = require("./webpack.dev.config");
 4 | var merge = require("webpack-merge");
 5 | 
 6 | module.exports = merge.smart({}, webpackDevConfig, {
 7 |   entry: {
 8 |     VueLazyImages: './src/index'
 9 |   },
10 |   plugins: [
11 |     new webpack.optimize.UglifyJsPlugin({
12 |       compress: {
13 |         warnings: false,
14 |         drop_console: false
15 |       },
16 |       comments: false,
17 |       minimize: false
18 |     }),
19 |     new webpack.DefinePlugin({
20 |       'process.env': {
21 |         NODE_ENV: '"production"'
22 |       }
23 |     }),
24 |     new webpack.BannerPlugin({
25 |       raw: true,
26 |       banner: '/*!\n' + ' * ' + pack.name + ' v' + pack.version + '\n'
27 |       + ' * (c) ' + new Date().getFullYear() + ' ' + pack.author + '\n'
28 |       + ' * Released under the ' + pack.license + ' License.\n'
29 |       + ' */'
30 |     })
31 |   ]
32 | });


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/demo.gif:
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https://raw.githubusercontent.com/lowesyang/vue-lazyload-images/7313a8b9586f6c68796a7cd6d3ce35915d822476/demo.gif


--------------------------------------------------------------------------------
/dist/VueLazyImages.js:
--------------------------------------------------------------------------------
1 | /*!
2 |  * vue-lazy-images v1.4.6
3 |  * (c) 2018 LowesYang
4 |  * Released under the MIT License.
5 |  */
6 | !function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.VueLazyImages=t():e.VueLazyImages=t()}(this,function(){return function(e){function t(o){if(n[o])return n[o].exports;var r=n[o]={i:o,l:!1,exports:{}};return e[o].call(r.exports,r,r.exports,t),r.l=!0,r.exports}var n={};return t.m=e,t.c=n,t.i=function(e){return e},t.d=function(e,n,o){t.o(e,n)||Object.defineProperty(e,n,{configurable:!1,enumerable:!0,get:o})},t.n=function(e){var n=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(n,"a",n),n},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="/dist/",t(t.s=64)}({63:function(e,t,n){"use strict";function o(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var r=function(){function e(e,t){for(var n=0;n<t.length;n++){var o=t[n];o.enumerable=o.enumerable||!1,o.configurable=!0,"value"in o&&(o.writable=!0),Object.defineProperty(e,o.key,o)}}return function(t,n,o){return n&&e(t.prototype,n),o&&e(t,o),t}}(),i=n(67),a=["scroll","wheel","mousewheel","resize","animationend","transitionend","touchmove"],s=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};o(this,e),this.init(t)}return r(e,[{key:"init",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};this.images=[],this.scrollParent=new WeakSet,this.options=e,this.eventsList=e.eventsList||a}},{key:"addImage",value:function(e){if(e.tagName&&"img"===e.tagName.toLowerCase()){var t=(0,i.getScrollParent)(e);if(t){var n={el:e,scrollParent:t};this.images.push(n),this.initListener(t)}}}},{key:"removeImage",value:function(e){var t=this.images.findIndex(function(t){return t.el===e});this.images.splice(t,1)}},{key:"initListener",value:function(e){var t=this,n=void 0;if(n=this.options.throttle?(0,i.throttle)(this.loadImage,this.options.throttle):this.options.debounce?(0,i.debounce)(this.loadImage,this.options.debounce):this.loadImage,!this.scrollParent.has(e)){var o=(0,i.getStyle)(e,"position");""!==o&&"static"!==o||(e.style.position="relative"),this.scrollParent.add(e),this.eventsList.forEach(function(o){e.addEventListener(o,n.bind(t))})}}},{key:"loadImage",value:function(){for(var e=this,t=this.images,n=0;n<t.length;n++)!function(o){var r=t[o].scrollParent,a=t[o].el;if((0,i.checkInView)(a,r,e.options.offset)){var s=a.dataset.src;s||console.error(a+" has no attribute 'data-src'!");var l=new Image;l.src=s,l.onload=function(){a.src=s,l=null},t.splice(o--,1)}n=o}(n)}}]),e}();t.default=s},64:function(e,t,n){"use strict";function o(e){return e&&e.__esModule?e:{default:e}}Object.defineProperty(t,"__esModule",{value:!0}),t.VueLazyImage=t.install=void 0;var r=n(65),i=o(r),a=n(63),s=o(a),l=function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};e.component("lazy-image",i.default),t.offset=parseInt(t.offset,10)||0;var n=new s.default(t);e.prototype.$lazyImages=n};t.default={install:l,VueLazyImage:i.default},t.install=l,t.VueLazyImage=i.default},65:function(e,t,n){var o=n(94)(n(66),n(95),null,null);o.options.__file="F:\\website\\vue-lazyload-images\\src\\VueLazyImage.vue",o.esModule&&Object.keys(o.esModule).some(function(e){return"default"!==e&&"__esModule"!==e})&&console.error("named exports are not supported in *.vue files."),o.options.functional&&console.error("[vue-loader] VueLazyImage.vue: functional components are not supported with templates, they should use render functions."),e.exports=o.exports},66:function(e,t,n){"use strict";Object.defineProperty(t,"__esModule",{value:!0}),t.default={data:function(){return{show:!1}},computed:{_class:function(){var e=void 0;return this.show&&(e=this.imgClass instanceof Array?this.imgClass.concat(["show"]):this.imgClass+" show"),e}},mounted:function(){var e=this;this.$lazyImages.addImage(this.$refs.target),this.$refs.target.onload=function(){e.show=!0},this.$lazyImages.loadImage()},beforeDestroy:function(){this.$lazyImages.removeImage(this.$refs.target)},props:{imgAlt:{type:String,default:""},src:{type:String,required:!0},placeholder:String,imgClass:{type:[Array,String],default:""}}}},67:function(e,t,n){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var o=function(){return!!(window.ActiveXObject||"ActiveXObject"in window)},r=function(e,t){return e&&e!==window?(o()?e.currentStyle[t]:getComputedStyle?getComputedStyle(e,null).getPropertyValue(t):e.style[t])||e.style[t]:null},i=function(e){return/scroll|auto/.test(r(e,"overflow")+r(e,"overflow-y")+r(e,"overflow-x"))},a=function(e){if(!(e instanceof HTMLElement))return console.error(e+" is not an HTMLElement"),null;for(var t=e;t&&t!==document.body&&t!==document.documentElement;){if(!t.parentNode)return null;if(i(t))return t;t=t.parentNode}return window},s=function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:window,n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:0,o=void 0,i=void 0,a=0,s=0,l=void 0;o=document.documentElement.clientHeight||document.body.clientHeight,i=document.documentElement.clientWidth||document.body.clientWidth;var u=void 0,c=void 0,f=void 0,d=void 0,p=void 0;if(p=e.getBoundingClientRect(),u=p.top-n,c=p.left-n,d=p.bottom+n,f=p.right+n,l=u<o&&d>0&&c<i&&f>0,t!==window){var h=t.scrollTop,v=t.scrollLeft,m=e.offsetWidth,g=e.offsetHeight;for(o=t.clientHeight,i=t.clientWidth;e&&e!==t;){var y=parseInt(r(e,"border-width"))||0;a+=e.offsetTop+y,s+=e.offsetLeft+y,e=e.offsetParent}l=l&&h+o>a-n&&a+g+n>h&&v+i>s-n&&s+m+n>v}return l},l=function(e,t){var n=0,o=void 0;return!t||t<=0?e:function(){var r=Date.now();r-n>t?(n=r,e.apply(this,arguments)):(clearTimeout(o),o=setTimeout(e.bind.apply(e,[this].concat(Array.prototype.slice.call(arguments))),t-(r-n)))}},u=function(e,t){var n=void 0;return!t||t<=0?e:function(){clearTimeout(n),n=setTimeout(e.bind.apply(e,[this].concat(Array.prototype.slice.call(arguments))),t)}};t.getScrollParent=a,t.getStyle=r,t.checkOverflow=i,t.checkInView=s,t.throttle=l,t.debounce=u},94:function(e,t){e.exports=function(e,t,n,o){var r,i=e=e||{},a=typeof e.default;"object"!==a&&"function"!==a||(r=e,i=e.default);var s="function"==typeof i?i.options:i;if(t&&(s.render=t.render,s.staticRenderFns=t.staticRenderFns),n&&(s._scopeId=n),o){var l=Object.create(s.computed||null);Object.keys(o).forEach(function(e){var t=o[e];l[e]=function(){return t}}),s.computed=l}return{esModule:r,exports:i,options:s}}},95:function(e,t,n){e.exports={render:function(){var e=this,t=e.$createElement,n=e._self._c||t;return n("div",[n("img",{ref:"target",class:e._class,attrs:{"data-src":e.src,src:e.placeholder,width:"100%",height:"100%",alt:e.imgAlt}})])},staticRenderFns:[]},e.exports.render._withStripped=!0}})});


--------------------------------------------------------------------------------
/dist/example.js:
--------------------------------------------------------------------------------
1 | /*!
2 |  * vue-lazy-images v1.4.6
3 |  * (c) 2018 LowesYang
4 |  * Released under the MIT License.
5 |  */
6 | !function(t,n){"object"==typeof exports&&"object"==typeof module?module.exports=n():"function"==typeof define&&define.amd?define([],n):"object"==typeof exports?exports.example=n():t.example=n()}(this,function(){return function(t){function n(r){if(e[r])return e[r].exports;var i=e[r]={i:r,l:!1,exports:{}};return t[r].call(i.exports,i,i.exports,n),i.l=!0,i.exports}var e={};return n.m=t,n.c=e,n.i=function(t){return t},n.d=function(t,e,r){n.o(t,e)||Object.defineProperty(t,e,{configurable:!1,enumerable:!0,get:r})},n.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(e,"a",e),e},n.o=function(t,n){return Object.prototype.hasOwnProperty.call(t,n)},n.p="/dist/",n(n.s=133)}([function(t,n,e){var r=e(2),i=e(22),o=e(12),a=e(13),u=e(19),c=function(t,n,e){var s,f,l,p,v=t&c.F,d=t&c.G,h=t&c.S,y=t&c.P,g=t&c.B,m=d?r:h?r[n]||(r[n]={}):(r[n]||{}).prototype,_=d?i:i[n]||(i[n]={}),b=_.prototype||(_.prototype={});d&&(e=n);for(s in e)f=!v&&m&&void 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--------------------------------------------------------------------------------
/example/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |   <meta charset="UTF-8">
 5 |   <title>Example Test</title>
 6 |   <style>
 7 |     * {
 8 |       margin: 0;
 9 |       padding: 0;
10 |     }
11 | 
12 |     #App {
13 |       padding-top: 50px;
14 |     }
15 | 
16 |     .notice {
17 |       padding: 10px;
18 |       font-size: 14px;
19 |     }
20 | 
21 |     .scrollY {
22 |       position: relative;
23 |       width: 100%;
24 |       max-height: 46vh;
25 |       overflow: auto;
26 |       margin-bottom: 5px;
27 |     }
28 | 
29 |     .scrollX {
30 |       width: 100%;
31 |       white-space: nowrap;
32 |       overflow-x: auto;
33 |     }
34 | 
35 |     .header {
36 |       position: fixed;
37 |       top: 0;
38 |       width: 100%;
39 |       height: 50px;
40 |       background-color: #0097A7;
41 |       z-index: 1;
42 |     }
43 | 
44 |     .header .addBtn {
45 |       margin: 7px;
46 |       padding: 10px 15px;
47 |       border-radius: 5px;
48 |       border: 0;
49 |       background-color: #212121;
50 |       color: white;
51 |       cursor: pointer;
52 |     }
53 | 
54 |     .scrollY .img {
55 |       width: 25%;
56 |       float: left;
57 |     }
58 | 
59 |     .scrollX .img {
60 |       width: 25%;
61 |       display: inline-block;
62 |       margin-top: 0px;
63 |     }
64 | 
65 |     .notice {
66 |       background-color: #212121;
67 |       color: white;
68 |     }
69 | 
70 |   </style>
71 | </head>
72 | <body>
73 | <div id="App">
74 |   <div class="header">
75 |     <button class="addBtn" @click="addImageY">Add image in scroll-Y</button>
76 |     <button class="addBtn" @click="addImageX">Add image in scroll-X</button>
77 |   </div>
78 |   <div class="notice">Y方向滚动懒加载</div>
79 |   <div class="scrollY">
80 |     <lazy-image class="img" img-class="exam" v-for="item in itemsY" :img-alt="item" :src="item" :placeholder="placeholder"></lazy-image>
81 |   </div>
82 |   <div class="notice">X方向滚动懒加载</div>
83 |   <div class="scrollX">
84 |     <lazy-image class="img" v-for="item in itemsX" :src="item" :placeholder="placeholder"></lazy-image>
85 |   </div>
86 | </div>
87 | <script src="../dist/example.js"></script>
88 | </body>
89 | </html>


--------------------------------------------------------------------------------
/example/index.js:
--------------------------------------------------------------------------------
 1 | import Vue from "vue"
 2 | import LazyImage from "../src";
 3 | import "babel-polyfill"
 4 | // import LazyImage from "vue-lazy-images";
 5 | Vue.use(LazyImage)
 6 | 
 7 | new Vue({
 8 |   data() {
 9 |     return {
10 |       placeholder: '/example/loading.gif',
11 |       itemsY: [
12 |         "http://img3.a0bi.com/upload/ttq/20150525/1432550622613_middle.jpg",
13 |         "http://img.mp.itc.cn/upload/20170220/2f2a4d0eb018483b97a7093e39b54cf7_th.jpg",
14 |         "http://ww1.sinaimg.cn/mw600/c2ba660dtw1e53cbidiizj20sg0sgtao.jpg",
15 |         "http://pic2.52pk.com/files/140211/1283568_105559_9065.jpg",
16 |       ],
17 |       itemsX: [
18 |         "http://photocdn.sohu.com/20151218/mp49366462_1450443096991_4.jpeg",
19 |         "http://ww1.sinaimg.cn/mw600/c2ba660dtw1e53cbidiizj20sg0sgtao.jpg",
20 |       ]
21 |     }
22 |   },
23 |   methods: {
24 |     addImageY() {
25 |       this.itemsY.push(this.itemsY[Math.floor(Math.random() * this.itemsY.length)] + "?t=" + Date.now());
26 |     },
27 |     addImageX() {
28 |       this.itemsX.push(this.itemsY[Math.floor(Math.random() * this.itemsY.length)] + "?t=" + Date.now())
29 |     }
30 |   }
31 | }).$mount("#App");


--------------------------------------------------------------------------------
/example/loading.gif:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/lowesyang/vue-lazyload-images/7313a8b9586f6c68796a7cd6d3ce35915d822476/example/loading.gif


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "vue-lazy-images",
 3 |   "version": "1.4.6",
 4 |   "description": "A plugin of lazy-load images for vue2.x",
 5 |   "main": "dist/VueLazyImages.js",
 6 |   "scripts": {
 7 |     "karma": "karma start config/karma.conf.js",
 8 |     "test": "karma start config/karma.conf.js --single-run",
 9 |     "start": "webpack-dev-server --hot --inline --port 8080 --config config/webpack.dev.config.js",
10 |     "build": "npm run test && webpack --config config/webpack.prod.config.js",
11 |     "coverage": "cat ./coverage/lcov.info | coveralls"
12 |   },
13 |   "keywords": [
14 |     "lazy-load",
15 |     "images",
16 |     "vue"
17 |   ],
18 |   "author": "LowesYang",
19 |   "license": "MIT",
20 |   "devDependencies": {
21 |     "babel-core": "^6.24.0",
22 |     "babel-loader": "^6.4.1",
23 |     "babel-plugin-istanbul": "^4.1.3",
24 |     "babel-plugin-transform-es2015-modules-umd": "^6.24.1",
25 |     "babel-polyfill": "^6.23.0",
26 |     "babel-preset-es2015": "^6.24.0",
27 |     "babel-preset-stage-0": "^6.22.0",
28 |     "chai": "^3.5.0",
29 |     "coveralls": "^2.13.1",
30 |     "css-loader": "^0.28.0",
31 |     "file-loader": "^0.11.1",
32 |     "karma": "^1.7.0",
33 |     "karma-babel-preprocessor": "^6.0.1",
34 |     "karma-chai": "^0.1.0",
35 |     "karma-coverage": "^1.1.1",
36 |     "karma-coveralls": "^1.1.2",
37 |     "karma-mocha": "^1.3.0",
38 |     "karma-phantomjs-launcher": "^1.0.4",
39 |     "karma-requirejs": "^1.1.0",
40 |     "karma-webpack": "^2.0.3",
41 |     "mocha": "^3.4.1",
42 |     "path": "^0.12.7",
43 |     "phantomjs-prebuilt": "^2.1.14",
44 |     "requirejs": "^2.3.3",
45 |     "rollup": "^0.41.6",
46 |     "rollup-plugin-babel": "^2.7.1",
47 |     "rollup-plugin-uglify": "^1.0.1",
48 |     "style-loader": "^0.16.1",
49 |     "vue": "^2.2.6",
50 |     "vue-lazy-images": "^1.0.0",
51 |     "vue-loader": "^11.3.4",
52 |     "vue-template-compiler": "^2.2.6",
53 |     "webpack": "^2.3.2",
54 |     "webpack-dev-server": "^2.4.2",
55 |     "webpack-merge": "^4.1.0"
56 |   }
57 | }
58 | 


--------------------------------------------------------------------------------
/src/LazyImage.js:
--------------------------------------------------------------------------------
 1 | import {getStyle, getScrollParent, checkInView, throttle, debounce} from "./utils";
 2 | 
 3 | const DEFAULT_EVENTS = ['scroll', 'wheel', 'mousewheel', 'resize', 'animationend', 'transitionend', 'touchmove'];
 4 | 
 5 | class LazyImage {
 6 |   constructor(options = {}) {
 7 |     this.init(options);
 8 |   }
 9 | 
10 |   init(options = {}) {
11 |     this.images = [];             //list of unload-images info
12 |     this.scrollParent = new WeakSet();      //list of scrollParent listener
13 |     this.options = options;
14 |     this.eventsList = options.eventsList || DEFAULT_EVENTS;
15 | 
16 |   }
17 | 
18 |   addImage(el) {
19 |     if (!el.tagName || el.tagName.toLowerCase() !== 'img') return;
20 |     let scrollParent = getScrollParent(el);
21 |     if (!scrollParent) return;
22 |     let image = {
23 |       el: el,
24 |       scrollParent: scrollParent
25 |     };
26 |     this.images.push(image);
27 |     this.initListener(scrollParent);
28 |   }
29 | 
30 |   removeImage(el) {
31 |     const index = this.images.findIndex(item => item.el === el);
32 |     this.images.splice(index, 1);
33 |   }
34 | 
35 |   initListener(scrollParent) {
36 |     let loadFn;
37 |     // get throttle or debounce function
38 |     if (this.options.throttle) {
39 |       loadFn = throttle(this.loadImage, this.options.throttle);
40 |     }
41 |     else if (this.options.debounce) {
42 |       loadFn = debounce(this.loadImage, this.options.debounce);
43 |     }
44 |     else loadFn = this.loadImage;
45 |     if (!this.scrollParent.has(scrollParent)) {
46 |       const position = getStyle(scrollParent, "position");
47 |       if (position === "" || position === "static") scrollParent.style.position = "relative";
48 |       this.scrollParent.add(scrollParent);
49 |       this.eventsList.forEach((event) => {
50 |         scrollParent.addEventListener(event, loadFn.bind(this));
51 |       })
52 |     }
53 |   }
54 | 
55 |   loadImage() {
56 |     let images = this.images;
57 |     // refresh images
58 |     for (let i = 0; i < images.length; i++) {
59 |       const scrollParent = images[i].scrollParent;
60 |       const el = images[i].el;
61 |       // ready to enter the screen but still "options.offset" px to go,load the img
62 |       if (checkInView(el, scrollParent, this.options.offset)) {
63 |         const src = el.dataset.src;
64 |         if (!src) {
65 |           console.error(`${el} has no attribute 'data-src'!`);
66 |         }
67 |         let tmpImg = new Image();
68 |         tmpImg.src = src;
69 |         tmpImg.onload = () => {
70 |           el.src = src;
71 |           tmpImg = null;
72 |         }
73 |         images.splice(i--, 1);
74 |       }
75 |     }
76 |   }
77 | }
78 | 
79 | export default LazyImage;


--------------------------------------------------------------------------------
/src/VueLazyImage.vue:
--------------------------------------------------------------------------------
 1 | <template>
 2 |   <div>
 3 |     <img
 4 |         ref="target"
 5 |         :class="_class"
 6 |         :data-src="src"
 7 |         :src="placeholder"
 8 |         width="100%"
 9 |         height="100%"
10 |         :alt="imgAlt"
11 |     >
12 |   </div>
13 | </template>
14 | 
15 | <script>
16 |   export default {
17 |     data() {
18 |       return {
19 |         show: false
20 |       }
21 |     },
22 |     computed: {
23 |       _class() {
24 |         let className;
25 |         if (this.show) {
26 |             if(this.imgClass instanceof Array) {
27 |                 className = this.imgClass.concat(['show']);
28 |             }
29 |             else className = this.imgClass + ' show';
30 |         }
31 |         return className;
32 |       }
33 |     },
34 |     mounted() {
35 |       this.$lazyImages.addImage(this.$refs.target);
36 |       this.$refs.target.onload = () => {
37 |         this.show = true;
38 |       };
39 |       this.$lazyImages.loadImage();
40 |     },
41 |     beforeDestroy() {
42 |       this.$lazyImages.removeImage(this.$refs.target);
43 |     },
44 |     props: {
45 |       imgAlt: {
46 |         type: String,
47 |         default: ''
48 |       },
49 |       src: {
50 |         type: String,
51 |         required: true
52 |       },
53 |       placeholder: String,
54 |       imgClass: {
55 |         type: [Array,String],
56 |         default: ''
57 |       }
58 |     }
59 |   }
60 | </script>


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
 1 | import VueLazyImage from "./VueLazyImage.vue"
 2 | import LazyImage from "./LazyImage"
 3 | 
 4 | /**
 5 |  *
 6 |  * @param vue
 7 |  * @param options
 8 |  * {
 9 |  *     offset:String || Number   // extra distance for preload
10 |  *     events:['scroll','resize'..]  //events which window should listen
11 |  *  }
12 |  */
13 | const install = (vue, options = {}) => {
14 |   vue.component('lazy-image', VueLazyImage);
15 |   options.offset = parseInt(options.offset, 10) || 0;
16 |   let lazyImg = new LazyImage(options);
17 |   vue.prototype.$lazyImages = lazyImg;
18 | }
19 | 
20 | //default export
21 | export default {
22 |   install,
23 |   VueLazyImage
24 | }
25 | //for cdn
26 | export {
27 |   install,
28 |   VueLazyImage
29 | }


--------------------------------------------------------------------------------
/src/utils.js:
--------------------------------------------------------------------------------
  1 | const isIE = function () {
  2 |   if (!!window.ActiveXObject || "ActiveXObject" in window) {
  3 |     return true
  4 |   }
  5 |   else return false
  6 | }
  7 | 
  8 | const getStyle = function (el, prop) {
  9 |   if (!el || el === window) return null;
 10 |   let value = (isIE() ? el.currentStyle[prop] : (getComputedStyle ?
 11 |     getComputedStyle(el, null).getPropertyValue(prop) : el.style[prop])) || el.style[prop];
 12 |   return value;
 13 | };
 14 | 
 15 | const checkOverflow = function (el) {
 16 |   let info = getStyle(el, "overflow") + getStyle(el, "overflow-y") + getStyle(el, "overflow-x");
 17 |   return /scroll|auto/.test(info);
 18 | };
 19 | 
 20 | const getScrollParent = (el) => {
 21 |   if (!(el instanceof HTMLElement)) {
 22 |     console.error(`${el} is not an HTMLElement`);
 23 |     return null;
 24 |   }
 25 |   let parent = el;
 26 |   while (parent) {
 27 |     if (parent === document.body || parent === document.documentElement) break;
 28 |     if (!parent.parentNode) return null;
 29 | 
 30 |     if (checkOverflow(parent)) return parent;
 31 |     parent = parent.parentNode;
 32 |   }
 33 |   return window;
 34 | };
 35 | 
 36 | const checkInView = function (el, scrollParent = window, offset = 0) {
 37 |   let clientH, clientW;
 38 |   let offsetTop = 0, offsetLeft = 0;
 39 |   let isInView;
 40 |   clientH = document.documentElement.clientHeight || document.body.clientHeight;
 41 |   clientW = document.documentElement.clientWidth || document.body.clientWidth;
 42 | 
 43 |   // use getBoundingClientRect
 44 |   let top, left, right, bottom, rect;
 45 |   rect = el.getBoundingClientRect();
 46 |   top = rect.top - offset;
 47 |   left = rect.left - offset;
 48 |   bottom = rect.bottom + offset;
 49 |   right = rect.right + offset;
 50 |   isInView = top < clientH && bottom > 0 && left < clientW && right > 0
 51 | 
 52 |   if (scrollParent !== window) {
 53 |     let scrollTop = scrollParent.scrollTop;
 54 |     let scrollLeft = scrollParent.scrollLeft;
 55 |     let width = el.offsetWidth, height = el.offsetHeight;
 56 |     clientH = scrollParent.clientHeight;
 57 |     clientW = scrollParent.clientWidth;
 58 |     while (el && el !== scrollParent) {
 59 |       let borderWidth = parseInt(getStyle(el, "border-width")) || 0;
 60 |       offsetTop += el.offsetTop + borderWidth;
 61 |       offsetLeft += el.offsetLeft + borderWidth;
 62 |       el = el.offsetParent;
 63 |     }
 64 |     // console.log(scrollTop,clientH,scrollLeft,clientW)
 65 |     isInView = isInView && (scrollTop + clientH > offsetTop - offset && offsetTop + height + offset > scrollTop
 66 |       && scrollLeft + clientW > offsetLeft - offset && offsetLeft + width + offset > scrollLeft)
 67 |   }
 68 |   return isInView;
 69 | }
 70 | 
 71 | const throttle = function (fn, interval) {
 72 |   let begin = 0, setTm;
 73 |   if (!interval || interval <= 0) return fn;
 74 |   return function () {
 75 |     const now = Date.now();
 76 |     if (now - begin > interval) {
 77 |       begin = now;
 78 |       fn.apply(this, arguments);
 79 |     }
 80 |     else {
 81 |       clearTimeout(setTm);
 82 |       setTm = setTimeout(fn.bind(this, ...arguments), interval - (now - begin));
 83 |     }
 84 |   }
 85 | }
 86 | 
 87 | const debounce = function (fn, idle) {
 88 |   let setTm;
 89 |   if (!idle || idle <= 0) return fn;
 90 |   return function () {
 91 |     clearTimeout(setTm);
 92 |     setTm = setTimeout(fn.bind(this, ...arguments), idle);
 93 |   }
 94 | }
 95 | 
 96 | export {
 97 |   getScrollParent,
 98 |   getStyle,
 99 |   checkOverflow,
100 |   checkInView,
101 |   throttle,
102 |   debounce
103 | }
104 | 
105 | 


--------------------------------------------------------------------------------
/test/LazyImage.spec.js:
--------------------------------------------------------------------------------
  1 | import LazyImage from '../src/LazyImage';
  2 | import {expect} from 'chai';
  3 | import {clearBody} from './tools';
  4 | 
  5 | let lazyImage=new LazyImage();
  6 | 
  7 | describe('Class LazyImage',()=>{
  8 |     it('new Class',()=>{
  9 |         expect(lazyImage.images).to.be.an.instanceof(Array);
 10 |         expect(lazyImage.scrollParent).to.be.an.instanceof(WeakSet);
 11 |         expect(lazyImage.options).to.be.an('object');
 12 |         expect(lazyImage.eventsList).to.be.an.instanceof(Array);
 13 |     })
 14 | 
 15 |     it('init Class',()=>{
 16 |         lazyImage.images=null;
 17 |         lazyImage.scrollParent=null;
 18 |         lazyImage.eventsList=null;
 19 |         lazyImage.init({
 20 |             test:'Success'
 21 |         });
 22 |         expect(lazyImage.options.test).to.be.equal('Success');
 23 |         expect(lazyImage.images).to.be.an.instanceof(Array);
 24 |         expect(lazyImage.scrollParent).to.be.an.instanceof(WeakSet);
 25 |         expect(lazyImage.options).to.be.an('object');
 26 |         expect(lazyImage.options.test).to.be.equal('Success');
 27 |         expect(lazyImage.eventsList).to.be.an.instanceof(Array);
 28 |     })
 29 | });
 30 | 
 31 | describe('Function addImage and initListener',()=>{
 32 |     beforeEach(()=>{
 33 |         lazyImage.init();
 34 |     })
 35 |     afterEach(()=>{
 36 |         clearBody();
 37 |     })
 38 |     it('@Param el is not img',()=>{
 39 |         let div=document.createElement('div');
 40 |         lazyImage.addImage(div);
 41 |         expect(lazyImage.images.length).to.be.equal(0);
 42 |     })
 43 | 
 44 |     it('@Param el is an img without parents',()=>{
 45 |         let img=new Image();
 46 |         lazyImage.addImage(img);
 47 |         expect(lazyImage.images.length).to.be.equal(0);
 48 |     })
 49 | 
 50 |     it('@Param el is an img owned by the body',()=>{
 51 |         let img=new Image();
 52 |         document.body.appendChild(img);
 53 |         lazyImage.addImage(img);
 54 |         expect(lazyImage.images.length).to.be.equal(1);
 55 |     })
 56 | 
 57 |     it('@Param el is an img owned by a div without parents',()=>{
 58 |         let img=new Image();
 59 |         let div=document.createElement('div');
 60 |         div.style.cssText='overflow:scroll;width:300px;height:500px;';
 61 |         div.appendChild(img);
 62 |         lazyImage.addImage(img);
 63 |         expect(lazyImage.images.length).to.be.equal(0);
 64 |     })
 65 | 
 66 |     it('@Param el is an img owned by a div with parents "body"',()=>{
 67 |         let img=new Image();
 68 |         let div=document.createElement('div');
 69 |         img.style.cssText='width:10px;height:10px;';
 70 |         div.style.cssText='overflow:scroll;width:300px;height:500px;';
 71 |         div.className='parent';
 72 |         div.appendChild(img);
 73 |         document.body.appendChild(div);
 74 |         lazyImage.addImage(img);
 75 |         expect(lazyImage.images[0].scrollParent.className).to.be.equal('parent');
 76 |     })
 77 | })
 78 | 
 79 | describe('Function loadImage',()=>{
 80 |     it('Unvisible image',()=>{
 81 |         lazyImage.images[0].el.style.marginTop='-300px';
 82 |         lazyImage.loadImage();
 83 |         expect(lazyImage.images.length).to.be.equal(1);
 84 |     })
 85 | 
 86 |     it('Visible image',()=>{
 87 |         let img=lazyImage.images[0].el;
 88 |         document.body.appendChild(img.parentNode);
 89 |         img.style.marginTop='0px';
 90 |         lazyImage.loadImage();
 91 |         expect(lazyImage.images.length).to.be.equal(0);
 92 |     })
 93 | 
 94 |     it('Unmounted image',()=>{
 95 |         let img=new Image();
 96 |         img.setAttribute('data-src','test');
 97 |         lazyImage.addImage(img);
 98 |         lazyImage.removeImage(img);
 99 |         expect(lazyImage.images.length).to.be.equal(0);
100 |         expect(img.src).to.be.equal('');
101 |     })
102 | })


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/test/tools.js:
--------------------------------------------------------------------------------
 1 | /**
 2 |  * Created by LowesYang on 2017/5/25.
 3 |  */
 4 | export function createTestDiv(){
 5 |     let div=document.createElement('div');
 6 |     div.style.cssText='width:100px;height:100px;';
 7 |     return div;
 8 | }
 9 | 
10 | export function clearBody(){
11 |     let childs=Array.prototype.slice.call(document.body.childNodes);
12 |     childs.forEach((node)=>{
13 |         if(node.tagName) document.body.removeChild(node);
14 |     })
15 | }


--------------------------------------------------------------------------------
/test/utils.spec.js:
--------------------------------------------------------------------------------
  1 | import {expect} from 'chai';
  2 | import {
  3 |   getScrollParent,
  4 |   getStyle,
  5 |   checkOverflow,
  6 |   checkInView,
  7 |   throttle,
  8 |   debounce
  9 | } from '../src/utils';
 10 | 
 11 | import {createTestDiv, clearBody} from './tools';
 12 | 
 13 | describe('Function getStyle', () => {
 14 |   it('@Param el is window', () => {
 15 |     expect(getStyle(window)).to.be.equal(null);
 16 |   })
 17 | 
 18 |   it('@param el and prop are undefined', () => {
 19 |     expect(getStyle()).to.be.equal(null);
 20 |   })
 21 | 
 22 |   it('@Param el is an element with overflow', () => {
 23 |     let div = createTestDiv();
 24 |     div.style.overflow = 'scroll';
 25 |     expect(getStyle(div, 'overflow')).to.be.equal('scroll');
 26 |   })
 27 | 
 28 |   it('@Param el is an element with prop whose value is empty', () => {
 29 |     let div = createTestDiv();
 30 |     expect(getStyle(div, 'overflow')).to.be.empty;
 31 |   })
 32 | 
 33 |   it('@Param el is an element with undefined prop', () => {
 34 |     let div = createTestDiv();
 35 |     expect(getStyle(div)).to.be.equal(undefined);
 36 |   })
 37 | });
 38 | 
 39 | describe('Function checkOverflow', () => {
 40 |   let testDiv = createTestDiv();
 41 | 
 42 |   it('@Param el is an element with overflow "scroll"', () => {
 43 |     testDiv.style.overflow = 'scroll';
 44 |     expect(checkOverflow(testDiv)).to.be.ok;
 45 |   })
 46 | 
 47 |   it('@Param el is an element with overflow "auto"', () => {
 48 |     testDiv.style.overflow = 'auto';
 49 |     expect(checkOverflow(testDiv)).to.be.ok;
 50 |   })
 51 | 
 52 |   it('@Param el is an element with overflow "hidden"', () => {
 53 |     testDiv.style.overflow = 'hidden';
 54 |     expect(checkOverflow(testDiv)).to.not.be.ok;
 55 |   })
 56 | 
 57 |   it('@Param el is an element without overflow', () => {
 58 |     testDiv.style.overflow = "";
 59 |     expect(checkOverflow(testDiv)).to.not.be.ok;
 60 |   })
 61 | });
 62 | 
 63 | describe('Function getScrollParent', () => {
 64 |   afterEach(() => {
 65 |     clearBody();
 66 |   })
 67 | 
 68 |   it('@Param el is a div whose parent is body', () => {
 69 |     let div = createTestDiv();
 70 |     document.body.appendChild(div);
 71 |     expect(getScrollParent(div)).to.be.equal(window);
 72 |   })
 73 | 
 74 |   it('@Param el is a div with a child div', () => {
 75 |     let parent = document.createElement('div');
 76 |     parent.className = 'parent';
 77 |     parent.style.cssText = 'overflow:scroll;';
 78 |     let child = document.createElement('div');
 79 |     child.className = 'child';
 80 |     parent.appendChild(child);
 81 |     document.body.appendChild(parent);
 82 |     expect(getScrollParent(child).className).to.be.equal('parent');
 83 |   })
 84 | 
 85 |   it('@Param el is a div without parents', () => {
 86 |     let div = document.createElement('div');
 87 |     expect(getScrollParent(div)).to.be.equal(null);
 88 |   })
 89 | 
 90 |   it('@Param el is body or documentElement', () => {
 91 |     expect(getScrollParent(document.body)).to.be.equal(window);
 92 |     expect(getScrollParent(document.documentElement)).to.be.equal(window);
 93 |   })
 94 | });
 95 | 
 96 | describe('Function checkInView', () => {
 97 |   afterEach(() => {
 98 |     clearBody();
 99 |   })
100 |   it('@Param el is a 100*100 div in the visible area whose parent is body ', () => {
101 |     let div = createTestDiv();
102 |     document.body.appendChild(div);
103 |     expect(checkInView(div)).to.be.ok;
104 |   })
105 | 
106 |   it('@Param el is a 100*100 div outside the visible area whose parent is body ', () => {
107 |     let div = createTestDiv();
108 |     div.style.cssText += 'margin-top:-200px;';
109 |     document.body.appendChild(div);
110 |     expect(checkInView(div)).to.not.be.ok;
111 |   })
112 | 
113 |   it('@Param el is a 100*100 div outside the visible whose parent is another div', () => {
114 |     let parent = createTestDiv();
115 |     parent.style.cssText = 'width:300px;height:300px;overflow:scroll;';
116 |     let div = createTestDiv();
117 |     div.style.marginTop = '-300px';
118 |     parent.appendChild(div);
119 |     document.body.appendChild(parent);
120 |     expect(checkInView(div, parent)).to.not.be.ok;
121 |     div.style.cssText += 'margin-top:0px;margin-left:-110px;';
122 |     expect(checkInView(div, parent)).to.not.be.ok;
123 |   })
124 | })
125 | 
126 | describe('Function throttle', () => {
127 |   it('Normal situation',()=>{
128 |     let count=0;
129 |     let fn=throttle(()=>{
130 |       count++;
131 |     },200);
132 |     fn();
133 |     expect(count).to.be.equal(1);
134 |     fn();fn();
135 |     expect(count).to.be.equal(1);
136 |     setTimeout(()=>{
137 |       fn();
138 |       expect(count).to.be.equal(2);
139 |     },200)
140 |   })
141 | 
142 |   it('@Param interval is not more than 0 or not number',()=>{
143 |     let count=0;
144 |     let fn=()=>{
145 |       count++;
146 |     };
147 |     let lastFn=throttle(fn,-1);
148 |     expect(lastFn === fn).to.be.equal(true);
149 |     lastFn();
150 |     expect(count).to.be.equal(1);
151 |     lastFn();
152 |     expect(count).to.be.equal(2);
153 | 
154 |     count=0;
155 |     lastFn=throttle(fn);
156 |     expect(lastFn === fn).to.be.equal(true);
157 |     lastFn();
158 |     expect(count).to.be.equal(1);
159 |     lastFn();
160 |     expect(count).to.be.equal(2);
161 |   })
162 | })
163 | 
164 | describe('Function debounce',()=>{
165 |   it('Normal situation',()=>{
166 |     let count=0;
167 |     let fn=debounce(()=>{
168 |       count++;
169 |     },200);
170 |     fn();
171 |     expect(count).to.be.equal(0);
172 |     setTimeout(()=>{
173 |       expect(count).to.be.equal(1);
174 |       fn();
175 |       expect(count).to.be.equal(1);
176 |     },200);
177 |   })
178 | 
179 |   it('@Param idle is not more than 0 or not number',()=>{
180 |     let count=0;
181 |     let fn=()=>{
182 |       count++;
183 |     };
184 |     let lastFn=debounce(fn,-1);
185 |     expect(lastFn === fn).to.be.equal(true);
186 |     lastFn();
187 |     expect(count).to.be.equal(1);
188 | 
189 |     count=0;
190 |     lastFn=debounce(fn);
191 |     expect(lastFn === fn).to.be.equal(true);
192 |     lastFn();
193 |     expect(count).to.be.equal(1);
194 |   })
195 | })


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