├── .jshintignore
├── .gitignore
├── .travis.yml
├── .editorconfig
├── test
    ├── fixtures
    │   ├── code-snippets.md
    │   ├── code-snippets.html
    │   ├── email-example.md
    │   ├── email-example.html
    │   ├── barkup.md
    │   ├── barkup.html
    │   ├── woofmark-sample.md
    │   ├── woofmark-sample.html
    │   ├── cross-tab-communication.md
    │   ├── cross-tab-communication.html
    │   ├── stop-breaking-the-web.md
    │   └── stop-breaking-the-web.html
    └── megamark.js
├── bower.json
├── .jshintrc
├── LICENSE
├── megamark.js
├── package.json
├── changelog.markdown
├── tokenizeLinks.js
├── readme.markdown
├── markdown.js
└── dist
    └── megamark.min.js


/.jshintignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | dist
3 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | .DS_Store
2 | *.sublime-*
3 | node_modules
4 | npm-debug.log


--------------------------------------------------------------------------------
/.travis.yml:
--------------------------------------------------------------------------------
1 | language: node_js
2 | node_js:
3 |   - '4'
4 |   - '5'
5 | 


--------------------------------------------------------------------------------
/.editorconfig:
--------------------------------------------------------------------------------
 1 | # editorconfig.org
 2 | root = true
 3 | 
 4 | [*]
 5 | indent_style = space
 6 | indent_size = 2
 7 | end_of_line = lf
 8 | charset = utf-8
 9 | trim_trailing_whitespace = true
10 | insert_final_newline = true
11 | 
12 | [*.md]
13 | trim_trailing_whitespace = false
14 | 


--------------------------------------------------------------------------------
/test/fixtures/code-snippets.md:
--------------------------------------------------------------------------------
 1 | ```js
 2 | var a = 'foo';
 3 | ```
 4 | 
 5 | then `some` inline code.
 6 | 
 7 | and a snippet without language
 8 | 
 9 | ```
10 | var a = 'bar';
11 | ```
12 | 
13 | lastly one without fences
14 | 
15 |     var foo = 'bar';
16 | 
17 | haha. nice
18 | 


--------------------------------------------------------------------------------
/bower.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "megamark",
 3 |   "version": "3.2.4",
 4 |   "description": "Markdown with easy tokenization, a fast highlighter, and a lean HTML sanitizer",
 5 |   "homepage": "https://github.com/bevacqua/megamark",
 6 |   "main": "dist/megamark.js",
 7 |   "authors": [
 8 |     "Nicolas Bevacqua <nicolasbevacqua@gmail.com>"
 9 |   ],
10 |   "license": "MIT"
11 | }
12 | 


--------------------------------------------------------------------------------
/.jshintrc:
--------------------------------------------------------------------------------
 1 | {
 2 |   "curly": true,
 3 |   "eqeqeq": true,
 4 |   "newcap": true,
 5 |   "noarg": true,
 6 |   "sub": true,
 7 |   "undef": true,
 8 |   "boss": true,
 9 |   "eqnull": true,
10 |   "strict": true,
11 |   "node": true,
12 |   "immed": true,
13 |   "validthis": true,
14 |   "globals": {
15 |     "jasmine": false,
16 |     "describe": false,
17 |     "xdescribe": false,
18 |     "it": false,
19 |     "xit": false,
20 |     "expect": false,
21 |     "beforeEach": false,
22 |     "spyOn": false
23 |   }
24 | }
25 | 


--------------------------------------------------------------------------------
/test/fixtures/code-snippets.html:
--------------------------------------------------------------------------------
 1 | <pre class="md-code-block"><code class="md-code md-lang-javascript"><span class="md-code-keyword">var</span> a = <span class="md-code-string">'foo'</span>;
 2 | </code></pre>
 3 | <p>then <code class="md-code md-code-inline">some</code> inline code.</p>
 4 | <p>and a snippet without language</p>
 5 | <pre class="md-code-block"><code class="md-code">var a = 'bar';
 6 | </code></pre>
 7 | <p>lastly one without fences</p>
 8 | <pre class="md-code-block"><code class="md-code">var foo = 'bar';
 9 | </code></pre>
10 | <p>haha. nice</p>
11 | 


--------------------------------------------------------------------------------
/test/fixtures/email-example.md:
--------------------------------------------------------------------------------
 1 | Hey there, I just wanted to let you know there's a special offer on my book today, _it's **half off**_.
 2 | 
 3 | Get half off my **JavaScript Application Design** book today! Enter code **dotd072115au** at [bevacqua.io/bf/book][1] when checking out. If you run into any issues, let me know.
 4 | 
 5 | Alright, back to writing about modules! *psst, don't tell anyone!*
 6 | 
 7 | Oh, now you can reply to any emails sent from this account. That means this very email but also the ones when I publish an article or a someone submits a comment. I'll be reading the replies. So any feedback you want to send, that's another way to do that.
 8 | 
 9 | Thanks,
10 | Nico
11 | 
12 | [1]: /author/compose
13 | 


--------------------------------------------------------------------------------
/test/fixtures/email-example.html:
--------------------------------------------------------------------------------
1 | <p>Hey there, I just wanted to let you know there’s a special offer on my book today, <em>it’s <strong>half off</strong></em>.</p>
2 | <p>Get half off my <strong>JavaScript Application Design</strong> book today! Enter code <strong>dotd072115au</strong> at <a href="/author/compose">bevacqua.io/bf/book</a> when checking out. If you run into any issues, let me know.</p>
3 | <p>Alright, back to writing about modules! <em>psst, don’t tell anyone!</em></p>
4 | <p>Oh, now you can reply to any emails sent from this account. That means this very email but also the ones when I publish an article or a someone submits a comment. I’ll be reading the replies. So any feedback you want to send, that’s another way to do that.</p>
5 | <p>Thanks,
6 | Nico</p>
7 | 


--------------------------------------------------------------------------------
/test/fixtures/barkup.md:
--------------------------------------------------------------------------------
 1 | # Markdown?
 2 | 
 3 | Here's a teensie bit of [Markdown][1] to get you started.
 4 | 
 5 | Markdown lets you produce **rich** HTML-formatted text by writing _plain text_. You can write `code`, text in _italics_ or give them **a "bolder" format**. You can create headings by prefixing them with one or more hash characters _(#)_. The less hashes they have, the more prominent your headings become.
 6 | 
 7 | Creating links is merely a matter of [wrapping some text in brackets][2] and referencing a resource locator, like the ones you'll find at the bottom of this text. Images can be embedded just the same, except you'll have to prefix the wrapped text with an exclamation point.
 8 | 
 9 | > Click on the <kbd>HTML</kbd> button to see this text come to life as HTML, the markup language of the web.
10 | >
11 | > -- Nico
12 | 
13 | [1]: http://daringfireball.net/projects/markdown/ "Original introduction to Markdown"
14 | [2]: http://stompflow.com
15 | 


--------------------------------------------------------------------------------
/test/fixtures/barkup.html:
--------------------------------------------------------------------------------
1 | <h1 id="markdown">Markdown?</h1>
2 | <p>Here’s a teensie bit of <a href="http://daringfireball.net/projects/markdown/" title="Original introduction to Markdown">Markdown</a> to get you started.</p>
3 | <p>Markdown lets you produce <strong>rich</strong> HTML-formatted text by writing <em>plain text</em>. You can write <code class="md-code md-code-inline">code</code>, text in <em>italics</em> or give them <strong>a “bolder” format</strong>. You can create headings by prefixing them with one or more hash characters <em>(#)</em>. The less hashes they have, the more prominent your headings become.</p>
4 | <p>Creating links is merely a matter of <a href="http://stompflow.com">wrapping some text in brackets</a> and referencing a resource locator, like the ones you’ll find at the bottom of this text. Images can be embedded just the same, except you’ll have to prefix the wrapped text with an exclamation point.</p>
5 | <blockquote>
6 | <p>Click on the <kbd>HTML</kbd> button to see this text come to life as HTML, the markup language of the web.</p>
7 | <p>– Nico</p>
8 | </blockquote>
9 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | The MIT License (MIT)
 2 | 
 3 | Copyright © 2015 Nicolas Bevacqua
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of
 6 | this software and associated documentation files (the "Software"), to deal in
 7 | the Software without restriction, including without limitation the rights to
 8 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 9 | the Software, and to permit persons to whom the Software is furnished to do so,
10 | 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, FITNESS
17 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 | 


--------------------------------------------------------------------------------
/megamark.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | var insane = require('insane');
 4 | var assign = require('assignment');
 5 | var markdown = require('./markdown');
 6 | var hightokens = require('highlight.js-tokens').map(codeclass);
 7 | 
 8 | function codeclass (token) {
 9 |   return 'md-code-' + token;
10 | }
11 | 
12 | function sanitize (html, o) {
13 |   var headings = { h1: 'id', h2: 'id', h3: 'id', h4: 'id', h5: 'id', h6: 'id' };
14 |   var options = assign({ allowedClasses: {}, allowedAttributes: headings }, o);
15 |   var ac = options.allowedClasses;
16 | 
17 |   add('mark', ['md-mark', 'md-code-mark']);
18 |   add('pre', ['md-code-block']);
19 |   add('code', markdown.languages);
20 |   add('span', hightokens);
21 | 
22 |   return insane(html, options);
23 | 
24 |   function add (type, more) {
25 |     ac[type] = (ac[type] || []).concat(more);
26 |   }
27 | }
28 | 
29 | function megamark (md, options) {
30 |   var o = options || {};
31 |   var html = markdown(md, o);
32 |   var sane = sanitize(html, o.sanitizer);
33 |   return sane;
34 | }
35 | 
36 | markdown.languages.push('md-code', 'md-code-inline'); // only sanitizing purposes
37 | megamark.parser = markdown.parser;
38 | module.exports = megamark;
39 | 


--------------------------------------------------------------------------------
/test/fixtures/woofmark-sample.md:
--------------------------------------------------------------------------------
 1 | # Markdown?
 2 | 
 3 | Here's a teensie bit of [Markdown](http://daringfireball.net/projects/markdown\)/ "Original introduction )to Markdown") to get you started.
 4 | 
 5 | Markdown lets you <mark>produce **rich** HTML-formatted text by writing _plain text_</mark>. You can write `code`, text in _italics_ or give them **a "bolder" format**. You can create headings by prefixing them with one or more hash characters _(#)_. The _less hashes_ they have, the _more prominent_ your headings become.
 6 | 
 7 | Creating **links** is merely a matter of [wrapping some text in brackets][2] and referencing a resource locator, like the ones you'll find at the bottom of this text. <mark>Images can be embedded</mark> just the same, except you'll have to prefix the wrapped text with _an exclamation mark_.
 8 | 
 9 | > Click on the <kbd>HTML</kbd> button to see this text come to life as HTML, the <mark>markup</mark> language of the web.
10 | > 
11 | > -- Nico
12 | 
13 | Note that,
14 | 
15 | ```javascript
16 | var markTags = 'still work';
17 | var within = true;
18 | 
19 | function code (<mark>here, are, some, args</mark>) {
20 |   // do wonderful things!
21 |   return here * are - some + args;
22 | }
23 | ```
24 | 
25 | [1]: http://daringfireball.net/projects/markdown/ "Original introduction to Markdown"
26 | [2]: http://ponyfoo.com
27 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "megamark",
 3 |   "description": "Markdown with easy tokenization, a fast highlighter, and a lean HTML sanitizer",
 4 |   "homepage": "https://github.com/bevacqua/megamark",
 5 |   "author": {
 6 |     "name": "Nicolas Bevacqua",
 7 |     "email": "nicolasbevacqua@gmail.com",
 8 |     "url": "http://ponyfoo.com"
 9 |   },
10 |   "version": "3.3.0",
11 |   "repository": {
12 |     "type": "git",
13 |     "url": "git://github.com/bevacqua/megamark.git"
14 |   },
15 |   "bugs": {
16 |     "url": "https://github.com/bevacqua/megamark/issues"
17 |   },
18 |   "scripts": {
19 |     "build": "jshint . && browserify -s megamark -do dist/megamark.js megamark.js && uglifyjs -m -c -o dist/megamark.min.js dist/megamark.js",
20 |     "deployment": "git add dist && npm version ${BUMP:-\"patch\"} --no-git-tag-version && git add package.json && git commit -m \"Autogenerated pre-deployment commit\" && bower version ${BUMP:-\"patch\"} && git reset HEAD~2 && git add . && git commit -am \"Release $(cat package.json | jq -r .version)\" && git push --tags && npm publish && git push",
21 |     "deploy": "npm run build && npm run deployment",
22 |     "test": "tape test/**/*.js"
23 |   },
24 |   "main": "./megamark",
25 |   "browser": {
26 |     "highlight.js": "highlight-redux"
27 |   },
28 |   "dependencies": {
29 |     "assignment": "2.1.0",
30 |     "highlight-redux": "1.0.1",
31 |     "highlight.js": "8.4.0",
32 |     "highlight.js-tokens": "1.0.0",
33 |     "insane": "2.6.0",
34 |     "linkify-it": "0.1.2",
35 |     "markdown-it": "5.1.0",
36 |     "sluggish": "1.0.1"
37 |   },
38 |   "devDependencies": {
39 |     "browserify": "10.2.6",
40 |     "jshint": "2.8.0",
41 |     "tape": "3.5.0",
42 |     "uglify-js": "2.4.23"
43 |   }
44 | }
45 | 


--------------------------------------------------------------------------------
/test/fixtures/woofmark-sample.html:
--------------------------------------------------------------------------------
 1 | <h1 id="markdown">Markdown?</h1>
 2 | <p>Here’s a teensie bit of <a href="http://daringfireball.net/projects/markdown)/" title="Original introduction )to Markdown">Markdown</a>[START] to get you started.</p>
 3 | <p>Markdown lets you [END]<mark class="md-mark">produce <strong>rich</strong> HTML-formatted text by writing <em>plain text</em></mark>. You can write <code class="md-code md-code-inline">code</code>, text in <em>italics</em> or give them <strong>a “bolder” format</strong>. You can create headings by prefixing them with one or more hash characters <em>(#)</em>. The <em>less hashes</em> they have, the <em>more prominent</em> your headings become.</p>
 4 | <p>Creating <strong>links</strong> is merely a matter of <a href="http://ponyfoo.com">wrapping some text in brackets</a> and referencing a resource locator, like the ones you’ll find at the bottom of this text. <mark class="md-mark">Images can be embedded</mark> just the same, except you’ll have to prefix the wrapped text with <em>an exclamation mark</em>.</p>
 5 | <blockquote>
 6 | <p>Click on the <kbd>HTML</kbd> button to see this text come to life as HTML, the <mark class="md-mark">markup</mark> language of the web.</p>
 7 | <p>– Nico</p>
 8 | </blockquote>
 9 | <p>Note that,</p>
10 | <pre class="md-code-block"><code class="md-code md-lang-javascript"><span class="md-code-keyword">var</span> markTags = <span class="md-code-string">'still work'</span>;
11 | <span class="md-code-keyword">var</span> within = <span class="md-code-literal">true</span>;
12 | 
13 | <span class="md-code-function"><span class="md-code-keyword">function</span> <span class="md-code-title">code</span> <span class="md-code-params">(<mark class="md-mark md-code-mark">here, are, some, args</mark>)</span> </span>{
14 |   <span class="md-code-comment">// do wonderful things!</span>
15 |   <span class="md-code-keyword">return</span> here * are - some + args;
16 | }
17 | </code></pre>
18 | 


--------------------------------------------------------------------------------
/changelog.markdown:
--------------------------------------------------------------------------------
 1 | # 3.2.4 Cyrillic
 2 | 
 3 | - Added `sh`, `shell` and `zsh` aliases for `bash` language
 4 | 
 5 | # 3.2.2 Mark Zuckerberg
 6 | 
 7 | - Fixed a number of issues with `markers` option, added tons of tests
 8 | 
 9 | # 3.2.1 Mark Twain
10 | 
11 | - Introduced for `markers` option, that can help preserve selection across parsing
12 | 
13 | # 3.1.0 Sluggish
14 | 
15 | - Allows `id` attribute on any headings
16 | - Adds an `id` to all headings
17 | 
18 | # 3.0.7 Insane Asylum
19 | 
20 | - Updated `insane@2.4.3`
21 | 
22 | # 3.0.6 Princess Zelda
23 | 
24 | - Fixed a bug where links would break a paragraph beyond repair
25 | 
26 | # 3.0.4 Murky
27 | 
28 | - Upgraded `markdown-it` to `4.4.0`
29 | 
30 | # 3.0.1 Mark
31 | 
32 | - `<mark>` elements can be used to highlight code, text
33 | - Updated `insane@2.4.2`
34 | - Upgraded `markdown-it` to `4.3.1`
35 | 
36 | # 2.1.7 Sanity Vanity
37 | 
38 | - Updated `insane@2.4.0`
39 | 
40 | # 2.1.5 Sanity Squatter
41 | 
42 | - Fixed a bug where you couldn't customize the allowed `<span>`, `<code>`, and `<pre>` class names on the sanitizer level
43 | - Updated `insane@2.2.0`
44 | 
45 | # 2.1.4 Tie Down
46 | 
47 | - Updated `assignment` to play nice with IE < 9
48 | 
49 | # 2.1.3 Bow Tie
50 | 
51 | - Added to Bower registry
52 | 
53 | # 2.1.2 Mega Consistent
54 | 
55 | - Freezing `markdown-it@3.0.7` for the time being
56 | 
57 | # 2.1.0 Linked Data
58 | 
59 | - Introduced `linkifiers` as another easy tokenizer option
60 | 
61 | # 2.0.0 Token Nation
62 | 
63 | - Simplified tokenization process
64 | 
65 | # 1.3.0 Insane Asylum
66 | 
67 | - Removed unused `marked` dependency
68 | 
69 | # 1.2.2 Insanity
70 | 
71 | - Updated `insane` to `2.1.1`
72 | 
73 | # 1.2.1 Assignments
74 | 
75 | - Moved `assign()` into `assignment` npm module
76 | 
77 | # 1.2.0 Lexingtown
78 | 
79 | - Replaced `marked` with `markdown-it`, improvements in compliance, parser speed, and code structure
80 | - Exposed `markdown-it` parser instance for extensibility
81 | 
82 | # 1.1.0 IPO
83 | 
84 | - Initial Public Release
85 | 


--------------------------------------------------------------------------------
/tokenizeLinks.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | function arrayReplaceAt (a, i, middle) {
  4 |   var left = a.slice(0, i);
  5 |   var right = a.slice(i + 1);
  6 |   return left.concat(middle, right);
  7 | }
  8 | 
  9 | function isLinkOpen (str) {
 10 |   return /^<a[>\s]/i.test(str);
 11 | }
 12 | 
 13 | function isLinkClose (str) {
 14 |   return /^<\/a\s*>/i.test(str);
 15 | }
 16 | 
 17 | // the majority of the code below was taken from markdown-it's linkify method
 18 | // https://github.com/markdown-it/markdown-it/blob/7075e8881f4f717e2f2932ea156bb8aff649c89d/lib/rules_core/linkify.js
 19 | 
 20 | function tokenizeLinks (state, context) {
 21 |   var i, j, l, tokens, token, currentToken, nodes, ln, text, pos, lastPos,
 22 |       level, htmlLinkLevel, url, fullUrl, urlText,
 23 |       blockTokens = state.tokens,
 24 |       links;
 25 | 
 26 |   if (!state.md.options.linkify) { return; }
 27 | 
 28 |   for (j = 0, l = blockTokens.length; j < l; j++) {
 29 |     if (blockTokens[j].type !== 'inline' ||
 30 |         !state.md.linkify.pretest(blockTokens[j].content)) {
 31 |       continue;
 32 |     }
 33 | 
 34 |     tokens = blockTokens[j].children;
 35 | 
 36 |     htmlLinkLevel = 0;
 37 | 
 38 |     // We scan from the end, to keep position when new tags added.
 39 |     // Use reversed logic in links start/end match
 40 |     for (i = tokens.length - 1; i >= 0; i--) {
 41 |       currentToken = tokens[i];
 42 | 
 43 |       // Skip content of markdown links
 44 |       if (currentToken.type === 'link_close') {
 45 |         i--;
 46 |         while (tokens[i].level !== currentToken.level && tokens[i].type !== 'link_open') {
 47 |           i--;
 48 |         }
 49 |         continue;
 50 |       }
 51 | 
 52 |       // Skip content of html tag links
 53 |       if (currentToken.type === 'html_inline') {
 54 |         if (isLinkOpen(currentToken.content) && htmlLinkLevel > 0) {
 55 |           htmlLinkLevel--;
 56 |         }
 57 |         if (isLinkClose(currentToken.content)) {
 58 |           htmlLinkLevel++;
 59 |         }
 60 |       }
 61 |       if (htmlLinkLevel > 0) { continue; }
 62 | 
 63 |       if (currentToken.type === 'text' && state.md.linkify.test(currentToken.content)) {
 64 | 
 65 |         text = currentToken.content;
 66 |         links = state.md.linkify.match(text);
 67 | 
 68 |         // Now split string to nodes
 69 |         nodes = [];
 70 |         level = currentToken.level;
 71 |         lastPos = 0;
 72 | 
 73 |         for (ln = 0; ln < links.length; ln++) {
 74 | 
 75 |           url = links[ln].url;
 76 |           fullUrl = state.md.normalizeLink(url);
 77 |           if (!state.md.validateLink(fullUrl)) { continue; }
 78 | 
 79 |           urlText = links[ln].text;
 80 | 
 81 |           // Linkifier might send raw hostnames like "example.com", where url
 82 |           // starts with domain name. So we prepend http:// in those cases,
 83 |           // and remove it afterwards.
 84 |           //
 85 |           if (!links[ln].schema) {
 86 |             urlText = state.md.normalizeLinkText('http://' + urlText).replace(/^http:\/\//, '');
 87 |           } else if (links[ln].schema === 'mailto:' && !/^mailto:/i.test(urlText)) {
 88 |             urlText = state.md.normalizeLinkText('mailto:' + urlText).replace(/^mailto:/, '');
 89 |           } else {
 90 |             urlText = state.md.normalizeLinkText(urlText);
 91 |           }
 92 | 
 93 |           pos = links[ln].index;
 94 | 
 95 |           if (pos > lastPos) {
 96 |             token         = new state.Token('text', '', 0);
 97 |             token.content = text.slice(lastPos, pos);
 98 |             token.level   = level;
 99 |             nodes.push(token);
100 |           }
101 | 
102 |           //// <this code is part of megamark>
103 |           html = null;
104 |           context.linkifiers.some(runUserLinkifier);
105 | 
106 |           if (typeof html === 'string') {
107 |             nodes.push({
108 |               type: 'html_block',
109 |               content: html,
110 |               level: level
111 |             });
112 |           } else {
113 |           //// </this code is part of megamark>
114 | 
115 |             token         = new state.Token('link_open', 'a', 1);
116 |             token.attrs   = [ [ 'href', fullUrl ] ];
117 |             token.level   = level++;
118 |             token.markup  = 'linkify';
119 |             token.info    = 'auto';
120 |             nodes.push(token);
121 | 
122 |             token         = new state.Token('text', '', 0);
123 |             token.content = urlText;
124 |             token.level   = level;
125 |             nodes.push(token);
126 | 
127 |             token         = new state.Token('link_close', 'a', -1);
128 |             token.level   = --level;
129 |             token.markup  = 'linkify';
130 |             token.info    = 'auto';
131 |             nodes.push(token);
132 | 
133 |           //// <this code is part of megamark>
134 |           }
135 |           //// </this code is part of megamark>
136 | 
137 |           lastPos = links[ln].lastIndex;
138 |         }
139 | 
140 |         if (lastPos < text.length) {
141 |           token         = new state.Token('text', '', 0);
142 |           token.content = text.slice(lastPos);
143 |           token.level   = level;
144 |           nodes.push(token);
145 |         }
146 | 
147 |         // replace current node
148 |         blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
149 |       }
150 |     }
151 |   }
152 | 
153 |   //// <this code is part of megamark>
154 |   var html;
155 | 
156 |   function runUserLinkifier (linkifier) {
157 |     html = linkifier(links[ln].url, links[ln].text);
158 |     return typeof html === 'string';
159 |   }
160 |   //// </this code is part of megamark>
161 | }
162 | 
163 | module.exports = tokenizeLinks;
164 | 


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/test/fixtures/cross-tab-communication.md:
--------------------------------------------------------------------------------
 1 | # Cross-tab Communication
 2 | 
 3 | The upcoming [SharedWorker][1] API allows to transmit data across iframes and even browser tabs or windows. It landed in Chrome years ago, and not so long ago in Firefox, but it's [nowhere to be seen][2] in IE or Safari. A wildly supported alternative exists that can be used today, but it's largely unknown. Let's explore it!
 4 | 
 5 | I wanted an elegant solution to the following scenario: suppose a human walks into your website, logs in, **opens a second tab**, and logs out in that tab. He's still _"logged in"_ on the first tab, except anything he touches will either redirect them to the login page or straight blow up in their face. A more inviting alternative would be to figure out that they're logged out and do something about it, such as display a dialog asking them to re-authenticate, or maybe the login view itself.
 6 | 
 7 | You could use the WebSocket API for this, but that'd be overkill. I wanted a lower-level technology flyswatter, so I started looking for cross-tab communication options. The first option that popped up was using cookies or `localStorage`, and then periodically checking whether they were logged in or not via `setInterval`. I wasn't satisfied with that answer because it would waste too many CPU cycles checking for something that might not ever come up. At that point I would've rather used a _["comet"][3] (also known as long-polling)_, Server-Sent Events, or WebSockets.
 8 | 
 9 | I was surprised to see that the answer was lying in front of my nose, it was `localStorage` all along!
10 | 
11 | Did you know that `localStorage` fires an event? More specifically, it fires an event whenever an item is added, modified, or removed _in another browsing context_. Effectively, this means that whenever you touch `localStorage` in any given tab, all other tabs can learn about it by listening for the `storage` event on the `window` object, like so:
12 | 
13 | ```
14 | window.addEventListener('storage', function (event) {
15 |   console.log(event.key, event.newValue);
16 | });
17 | ```
18 | 
19 | The `event` object contains a few relevant properties.
20 | 
21 | Property   | Description
22 | -----------|---------------------
23 | `key`      | The affected key in `localStorage`
24 | `newValue` | The value that is currently assigned to that key
25 | `oldValue` | The value before modification
26 | `url`      | The URL of the page where the change occurred
27 | 
28 | Whenever a tab modifies something in `localStorage`, an event fires in every other tab. This means we're able to _communicate across browser tabs_ simply by setting values on `localStorage`. Consider the following pseudo_ish_-code example:
29 | 
30 | ```js
31 | var loggedOn;
32 | 
33 | // TODO: call when logged-in user changes or logs out
34 | logonChanged();
35 | 
36 | window.addEventListener('storage', updateLogon);
37 | window.addEventListener('focus', checkLogon);
38 | 
39 | function getUsernameOrNull () {
40 |   // TODO: return whether the user is logged on
41 | }
42 | 
43 | function logonChanged () {
44 |   var uname = getUsernameOrNull();
45 |   loggedOn = uname;
46 |   localStorage.setItem('logged-on', uname);
47 | }
48 | 
49 | function updateLogon (event) {
50 |   if (event.key === 'logged-on') {
51 |     loggedOn = event.newValue;
52 |   }
53 | }
54 | 
55 | function checkLogon () {
56 |   var uname = getUsernameOrNull();
57 |   if (uname !== loggedOn) {
58 |     location.reload();
59 |   }
60 | }
61 | ```
62 | 
63 | The basic idea is that when a user has two open tabs, logs out from one of them, and goes back to the other tab, the page is reloaded and _(hopefully)_ the server-side logic redirects them to somewhere else. The check is being done only when the tab is focused as a nod to the fact that maybe they log out and they log back in immediately, and in those cases we wouldn't want to log them out of every other tab.
64 | 
65 | We could certainly improve that piece of code, but it serves its purpose pretty well.  A better implementation would probably ask them to log in on the spot, but note that this also works the other way around: when they log in and go to another tab that was also logged out, the snippet detects that change reloading the page, and then the server would redirect them to the logged-in fountain-of-youth blessing of an experience you call your website _(again, hopefully)_.
66 | 
67 | # A simpler API
68 | 
69 | The `localStorage` API is arguably one of the easiest to use APIs there are, when it comes to web browsers, and it also enjoys quite thorough cross-browser support. There are, however, some quirks such as incognito Safari throwing on sets with a `QuotaExceededError`, no support for JSON out the box, or older browsers bumming you out.
70 | 
71 | For those reasons, I put together [local-storage][4] which is a module that provides a simplified API to `localStorage`, gets rid of those quirks, falls back to an in-memory store when the `localStorage` API is missing, and also makes it easier to consume `storage` events, by letting you register and unregister listeners for specific keys.
72 | 
73 | API endpoints in `local-storage@1.3.1` _(**latest**, at the time of this writing)_ are listed below.
74 | 
75 | - `ls(key, value?)` gets or sets `key`
76 | - `ls.get(key)` gets the value in `key`
77 | - `ls.set(key, value)` sets `key` to `value`
78 | - `ls.remove(key)` removes `key`
79 | - `ls.on(key, fn(value, old, url))` listens for changes to `key` in other tabs, triggers `fn`
80 | - `ls.off(key, fn)` unregisters listener previously added with `ls.on`
81 | 
82 | It's also worth mentioning that [local-storage][4] registers a single `storage` event handler and keeps track of every key you want to observe, rather than register multiple `storage` events.
83 | 
84 | I'd be interested to learn about other use cases for low-tech communication across tabs! Certainly sounds useful for _offline-first_ development, particularly if we keep in mind that `SharedWorker` might take a while to become widely supported, and WebSockets are unreliable in offline-first scenarios.
85 | 
86 | [1]: https://developer.mozilla.org/en-US/docs/Web/API/SharedWorker "SharedWorker Web API on MDN"
87 | [2]: http://caniuse.com/#feat=sharedworkers "Can I Use SharedWorkers?"
88 | [3]: http://stackoverflow.com/a/12855533/389745 "What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?"
89 | [4]: https://github.com/bevacqua/local-storage "bevacqua/local-storage on GitHub"
90 | 


--------------------------------------------------------------------------------
/readme.markdown:
--------------------------------------------------------------------------------
  1 | # megamark
  2 | 
  3 | > [markdown-it][1] with easy tokenization, a fast highlighter, and a lean HTML sanitizer
  4 | 
  5 | Megamark is [markdown-it][1] plus a few reasonable factory defaults.
  6 | 
  7 | - Markdown parsing via [markdown-it][1]
  8 | - HTML is sanitized via [insane][2], and _that's configurable_
  9 | - Code is highlighted with [highlight.js][3] _(on a [diet in the client-side][4]!)_
 10 | - Tokenization made easy: **turn those `@` mentions into links in no-time!**
 11 | - Text gets prettified just like you're used to from [marked's `smartypants`][5]
 12 | - You can highlight interesting content using `<mark>` tags, _even inside code blocks_
 13 | - Headings get unique `id`, helping you implement navigation in your Markdown documents
 14 | - Still manages to produce a small footprint
 15 | 
 16 | # Install
 17 | 
 18 | ```shell
 19 | npm install megamark --save
 20 | ```
 21 | 
 22 | ```shell
 23 | bower install megamark --save
 24 | ```
 25 | 
 26 | # `megamark(markdown, options?)`
 27 | 
 28 | The `markdown` input will be parsed via `markdown-it`. Megamark configures `markdown-it` for syntax highlighting, prefixing classes with `md-`. Output is sanitized via [insane][2], and you can configure the whitelisting process too.
 29 | 
 30 | ### `options.tokenizers`
 31 | 
 32 | Tokenizers can help you transform bits of text like `@bevacqua` into links. This is often a very useful feature for your users, but hardly ever implemented by developers because how convoluted it is. With `megamark`, it becomes a pretty easy thing to do.
 33 | 
 34 | ```js
 35 | megamark('Who is this @bevacqua person?', {
 36 |   tokenizers: [{
 37 |     token: /(^|\s)@([A-z]+)\b/g,
 38 |     transform: function (all, separator, username) {
 39 |       return separator + '<a href="/' + username + '">' + all + '</a>';
 40 |     }
 41 |   }]
 42 | });
 43 | // <- '<p>Who is this <a href='/bevacqua'>@bevacqua</a> person?</p>\n'
 44 | ```
 45 | 
 46 | The `transform` method will get all of the arguments of `text.match(token)`, so the first argument will be `text`, followed by any capturing groups. In our case, the `/(^|\s)@([A-z]+)\b/` can be decomposed as follows.
 47 | 
 48 | - First off we have `(?:^|\s)`
 49 |   - The parenthesis delimit a capturing group
 50 |   - It'll be passed to transform as the second argument
 51 |   - `^|\s` means that we are looking to match either the start of input or a space character
 52 |   - We can't use `\b` instead of this expression because `@` is not a word character
 53 | - Then there's the `@` literal
 54 | - Another capturing group, `([A-z]+)`
 55 |   - It'll be passed to transform as the third argument
 56 |   - Matches one or more alphabet characters
 57 | - Finally, `\b` means that we want to match everything up to a word boundary
 58 | 
 59 | You can use any regular expression you want, but make sure to use the `g` modifier if you want to match multiples of any given token.
 60 | 
 61 | ### `options.linkifiers`
 62 | 
 63 | Linkifiers are a simpler kind of tokenizer, but they're also more limited. Instead of asking you for a token expression, linkifiers will run on every single user-provided link _(that's in plain text, such as `ponyfoo.com`, note that actual links such as `[ponyfoo](http://ponyfoo.com)` won't be affected by this)_. If an HTML string is returned from your linkifier, then that'll be used. If none of your linkifiers return an HTML string, then the original functionality of converting the link text into an HTML link will be used.
 64 | 
 65 | Linkifiers are run one by one. The first linkifier to return a string will stop the rest of the linkifiers from ever running. Each linkifier receives an `href` argument and a `text` argument, containing the actual link and the text that should go in the link. These are just hints, you can return arbitrary HTML from your linkifier method, even something other than anchor links.
 66 | 
 67 | ###### Example
 68 | 
 69 | Return `''` when you want to completely ignore a link. Maybe use a condition where you whitelist links from origins you're happy with.
 70 | 
 71 | ```js
 72 | megamark('ponyfoo.com', {
 73 |   linkifiers: [function (href, text) {
 74 |     return '';
 75 |   }]
 76 | });
 77 | // <- '<p></p>\n'
 78 | ```
 79 | 
 80 | ###### Example
 81 | 
 82 | A real use case for this type of tokenizer is prettifying the text on the link. This is particularly useful for links on your own domain. The example below converts links that would be turned into `<a href='http://localhost:9000/bevacqua/stompflow/issues/28'>http://localhost:9000/bevacqua/stompflow/issues/28</a>` into `<a href='http://localhost:9000/bevacqua/stompflow/issues/28' class='issue-id'>#28</a>` instead.
 83 | 
 84 | ```js
 85 | megamark('http://localhost:9000/bevacqua/stompflow/issues/28', {
 86 |   linkifiers: [function (href, text) {
 87 |     return "<a href='" + href + "' class='issue-id'>#" + href.split('/').pop() + "</a>";
 88 |   }]
 89 | });
 90 | // <- '<p><a href='http://localhost:9000/bevacqua/stompflow/issues/28' class='issue-id'>#28</a></p>\n'
 91 | ```
 92 | 
 93 | ### `options.sanitizer`
 94 | 
 95 | These configuration options will be passed to [insane][2]. The defaults from [insane][2] are used by default.
 96 | 
 97 | ### `options.markers`
 98 | 
 99 | _Advanced option._ Setting markers to an array such as `[[0, 'START'], [10, 'END']]` will place each of those markers in the output, based on the input index you want to track. This feature is necessary because there is no other reliable way of tracking a text cursor position before and after a piece of Markdown is converted to HTML.
100 | 
101 | The following example shows how markers could be used to preserve a text selection across Markdown-into-HTML parsing, by providing markers for each cursor. When the output from `megamark` comes back, all you need to do is find your markers, remove them, and place the text selection at their indices. The [`woofmark`][6] Markdown/HTML/WYSIWYG editor module leverages this functionality to do exactly that.
102 | 
103 | ```js
104 | megamark('**foo**', {
105 |   markers: [[1, '[START]'], [4, '[END]']]
106 | });
107 | // <- '<strong>[START]fo[END]o</strong>'
108 | ```
109 | 
110 | <sub>Also note that, as shown in the example above, when a marker can't be placed in the output exactly where you asked for, it'll be cleanly placed nearby. In the above example, the `[START]` marker would've been placed _"somewhere inside"_ the opening `<strong>` tag, but right after the opening tag finishes was preferred.</sub>
111 | 
112 | # License
113 | 
114 | MIT
115 | 
116 | [1]: https://github.com/markdown-it/markdown-it
117 | [2]: https://github.com/bevacqua/insane
118 | [3]: https://github.com/isagalaev/highlight.js
119 | [4]: https://github.com/bevacqua/highlight-redux
120 | [5]: https://github.com/chjj/marked#smartypants
121 | [6]: https://github.com/bevacqua/woofmark
122 | 


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/test/fixtures/cross-tab-communication.html:
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 1 | <h1 id="cross-tab-communication">Cross-tab Communication</h1>
 2 | <p>The upcoming <a href="https://developer.mozilla.org/en-US/docs/Web/API/SharedWorker" title="SharedWorker Web API on MDN">SharedWorker</a> API allows to transmit data across iframes and even browser tabs or windows. It landed in Chrome years ago, and not so long ago in Firefox, but it’s <a href="http://caniuse.com/#feat=sharedworkers" title="Can I Use SharedWorkers?">nowhere to be seen</a> in IE or Safari. A wildly supported alternative exists that can be used today, but it’s largely unknown. Let’s explore it!</p>
 3 | <p>I wanted an elegant solution to the following scenario: suppose a human walks into your website, logs in, <strong>opens a second tab</strong>, and logs out in that tab. He’s still <em>“logged in”</em> on the first tab, except anything he touches will either redirect them to the login page or straight blow up in their face. A more inviting alternative would be to figure out that they’re logged out and do something about it, such as display a dialog asking them to re-authenticate, or maybe the login view itself.</p>
 4 | <p>You could use the WebSocket API for this, but that’d be overkill. I wanted a lower-level technology flyswatter, so I started looking for cross-tab communication options. The first option that popped up was using cookies or <code class="md-code md-code-inline">localStorage</code>, and then periodically checking whether they were logged in or not via <code class="md-code md-code-inline">setInterval</code>. I wasn’t satisfied with that answer because it would waste too many CPU cycles checking for something that might not ever come up. At that point I would’ve rather used a <em><a href="http://stackoverflow.com/a/12855533/389745" title="What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?">“comet”</a> (also known as long-polling)</em>, Server-Sent Events, or WebSockets.</p>
 5 | <p>I was surprised to see that the answer was lying in front of my nose, it was <code class="md-code md-code-inline">localStorage</code> all along!</p>
 6 | <p>Did you know that <code class="md-code md-code-inline">localStorage</code> fires an event? More specifically, it fires an event whenever an item is added, modified, or removed <em>in another browsing context</em>. Effectively, this means that whenever you touch <code class="md-code md-code-inline">localStorage</code> in any given tab, all other tabs can learn about it by listening for the <code class="md-code md-code-inline">storage</code> event on the <code class="md-code md-code-inline">window</code> object, like so:</p>
 7 | <pre class="md-code-block"><code class="md-code">window.addEventListener('storage', function (event) {
 8 |   console.log(event.key, event.newValue);
 9 | });
10 | </code></pre>
11 | <p>The <code class="md-code md-code-inline">event</code> object contains a few relevant properties.</p>
12 | <table>
13 | <thead>
14 | <tr>
15 | <th>Property</th>
16 | <th>Description</th>
17 | </tr>
18 | </thead>
19 | <tbody>
20 | <tr>
21 | <td><code class="md-code md-code-inline">key</code></td>
22 | <td>The affected key in <code class="md-code md-code-inline">localStorage</code></td>
23 | </tr>
24 | <tr>
25 | <td><code class="md-code md-code-inline">newValue</code></td>
26 | <td>The value that is currently assigned to that key</td>
27 | </tr>
28 | <tr>
29 | <td><code class="md-code md-code-inline">oldValue</code></td>
30 | <td>The value before modification</td>
31 | </tr>
32 | <tr>
33 | <td><code class="md-code md-code-inline">url</code></td>
34 | <td>The URL of the page where the change occurred</td>
35 | </tr>
36 | </tbody>
37 | </table>
38 | <p>Whenever a tab modifies something in <code class="md-code md-code-inline">localStorage</code>, an event fires in every other tab. This means we’re able to <em>communicate across browser tabs</em> simply by setting values on <code class="md-code md-code-inline">localStorage</code>. Consider the following pseudo_ish_-code example:</p>
39 | <pre class="md-code-block"><code class="md-code md-lang-javascript"><span class="md-code-keyword">var</span> loggedOn;
40 | 
41 | <span class="md-code-comment">// TODO: call when logged-in user changes or logs out</span>
42 | logonChanged();
43 | 
44 | <span class="md-code-built_in">window</span>.addEventListener(<span class="md-code-string">'storage'</span>, updateLogon);
45 | <span class="md-code-built_in">window</span>.addEventListener(<span class="md-code-string">'focus'</span>, checkLogon);
46 | 
47 | <span class="md-code-function"><span class="md-code-keyword">function</span> <span class="md-code-title">getUsernameOrNull</span> <span class="md-code-params">()</span> </span>{
48 |   <span class="md-code-comment">// TODO: return whether the user is logged on</span>
49 | }
50 | 
51 | <span class="md-code-function"><span class="md-code-keyword">function</span> <span class="md-code-title">logonChanged</span> <span class="md-code-params">()</span> </span>{
52 |   <span class="md-code-keyword">var</span> uname = getUsernameOrNull();
53 |   loggedOn = uname;
54 |   localStorage.setItem(<span class="md-code-string">'logged-on'</span>, uname);
55 | }
56 | 
57 | <span class="md-code-function"><span class="md-code-keyword">function</span> <span class="md-code-title">updateLogon</span> <span class="md-code-params">(event)</span> </span>{
58 |   <span class="md-code-keyword">if</span> (event.key === <span class="md-code-string">'logged-on'</span>) {
59 |     loggedOn = event.newValue;
60 |   }
61 | }
62 | 
63 | <span class="md-code-function"><span class="md-code-keyword">function</span> <span class="md-code-title">checkLogon</span> <span class="md-code-params">()</span> </span>{
64 |   <span class="md-code-keyword">var</span> uname = getUsernameOrNull();
65 |   <span class="md-code-keyword">if</span> (uname !== loggedOn) {
66 |     location.reload();
67 |   }
68 | }
69 | </code></pre>
70 | <p>The basic idea is that when a user has two open tabs, logs out from one of them, and goes back to the other tab, the page is reloaded and <em>(hopefully)</em> the server-side logic redirects them to somewhere else. The check is being done only when the tab is focused as a nod to the fact that maybe they log out and they log back in immediately, and in those cases we wouldn’t want to log them out of every other tab.</p>
71 | <p>We could certainly improve that piece of code, but it serves its purpose pretty well.  A better implementation would probably ask them to log in on the spot, but note that this also works the other way around: when they log in and go to another tab that was also logged out, the snippet detects that change reloading the page, and then the server would redirect them to the logged-in fountain-of-youth blessing of an experience you call your website <em>(again, hopefully)</em>.</p>
72 | <h1 id="a-simpler-api">A simpler API</h1>
73 | <p>The <code class="md-code md-code-inline">localStorage</code> API is arguably one of the easiest to use APIs there are, when it comes to web browsers, and it also enjoys quite thorough cross-browser support. There are, however, some quirks such as incognito Safari throwing on sets with a <code class="md-code md-code-inline">QuotaExceededError</code>, no support for JSON out the box, or older browsers bumming you out.</p>
74 | <p>For those reasons, I put together <a href="https://github.com/bevacqua/local-storage" title="bevacqua/local-storage on GitHub">local-storage</a> which is a module that provides a simplified API to <code class="md-code md-code-inline">localStorage</code>, gets rid of those quirks, falls back to an in-memory store when the <code class="md-code md-code-inline">localStorage</code> API is missing, and also makes it easier to consume <code class="md-code md-code-inline">storage</code> events, by letting you register and unregister listeners for specific keys.</p>
75 | <p>API endpoints in <code class="md-code md-code-inline">local-storage@1.3.1</code> <em>(<strong>latest</strong>, at the time of this writing)</em> are listed below.</p>
76 | <ul>
77 | <li><code class="md-code md-code-inline">ls(key, value?)</code> gets or sets <code class="md-code md-code-inline">key</code></li>
78 | <li><code class="md-code md-code-inline">ls.get(key)</code> gets the value in <code class="md-code md-code-inline">key</code></li>
79 | <li><code class="md-code md-code-inline">ls.set(key, value)</code> sets <code class="md-code md-code-inline">key</code> to <code class="md-code md-code-inline">value</code></li>
80 | <li><code class="md-code md-code-inline">ls.remove(key)</code> removes <code class="md-code md-code-inline">key</code></li>
81 | <li><code class="md-code md-code-inline">ls.on(key, fn(value, old, url))</code> listens for changes to <code class="md-code md-code-inline">key</code> in other tabs, triggers <code class="md-code md-code-inline">fn</code></li>
82 | <li><code class="md-code md-code-inline">ls.off(key, fn)</code> unregisters listener previously added with <code class="md-code md-code-inline">ls.on</code></li>
83 | </ul>
84 | <p>It’s also worth mentioning that <a href="https://github.com/bevacqua/local-storage" title="bevacqua/local-storage on GitHub">local-storage</a> registers a single <code class="md-code md-code-inline">storage</code> event handler and keeps track of every key you want to observe, rather than register multiple <code class="md-code md-code-inline">storage</code> events.</p>
85 | <p>I’d be interested to learn about other use cases for low-tech communication across tabs! Certainly sounds useful for <em>offline-first</em> development, particularly if we keep in mind that <code class="md-code md-code-inline">SharedWorker</code> might take a while to become widely supported, and WebSockets are unreliable in offline-first scenarios.</p>
86 | 


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/markdown.js:
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  1 | 'use strict';
  2 | 
  3 | var MarkdownIt = require('markdown-it');
  4 | var hljs = require('highlight.js');
  5 | var sluggish = require('sluggish');
  6 | var tokenizeLinks = require('./tokenizeLinks');
  7 | var md = new MarkdownIt({
  8 |   html: true,
  9 |   xhtmlOut: true,
 10 |   linkify: true,
 11 |   typographer: true,
 12 |   langPrefix: 'md-lang-alias-',
 13 |   highlight: highlight.bind(null, false)
 14 | });
 15 | var ralias = / class="md-lang-alias-([^"]+)"/;
 16 | var aliases = {
 17 |   js: 'javascript',
 18 |   md: 'markdown',
 19 |   html: 'xml', // next best thing
 20 |   jade: 'css', // next best thing
 21 |   zsh: 'bash', // next best thing
 22 |   shell: 'bash', // next best thing
 23 |   sh: 'bash' // next best thing
 24 | };
 25 | 
 26 | md.core.ruler.after('linkify', 'pos_counter', function posCounter (state) {
 27 |   var partial = state.src;
 28 |   var cursor = 0;
 29 |   state.tokens.forEach(function crawl (token, i) {
 30 |     token.cursorStart = cursor;
 31 |     if (token.markup) {
 32 |       moveCursor(token.markup);
 33 |     }
 34 |     if (token.type === 'link_open') {
 35 |       moveCursor('[');
 36 |     }
 37 |     if (token.type === 'link_close') {
 38 |       moveCursorAfterLinkClose();
 39 |     }
 40 |     if (token.type === 'image') {
 41 |       moveCursor('![');
 42 |     }
 43 |     if (token.children) {
 44 |       token.children.forEach(crawl);
 45 |     } else if (token.content) {
 46 |       token.src = token.content;
 47 |       moveCursor(token.src);
 48 |     }
 49 |     if (token.type === 'code_inline') { // closing mark
 50 |       moveCursor(token.markup);
 51 |     }
 52 |     if (token.type === 'heading_open') {
 53 |       moveCursor('');
 54 |     }
 55 |     if (token.map) {
 56 |       moveCursor('');
 57 |     }
 58 |     token.cursorEnd = cursor;
 59 |   });
 60 | 
 61 |   function moveCursor (needle) {
 62 |     var regex = needle instanceof RegExp;
 63 |     var re = regex ? needle : new RegExp('^\\s*' + escapeForRegExp(needle), 'ig');
 64 |     var match = re.exec(partial);
 65 |     if (!match) {
 66 |       return false;
 67 |     }
 68 |     var diff = re.lastIndex;
 69 |     cursor += diff;
 70 |     partial = partial.slice(diff);
 71 |     return true;
 72 |   }
 73 | 
 74 |   function moveCursorAfterLinkClose () {
 75 |     moveCursor(']');
 76 |     if (!moveCursor(/^\s*\[[^\]]+\]/g)) {
 77 |       moveCursor('(');
 78 |       moveCursorAfterParenthesis();
 79 |     }
 80 |   }
 81 | 
 82 |   function moveCursorAfterParenthesis () {
 83 |     var prev;
 84 |     var char;
 85 |     var i;
 86 |     var inQuotes = false;
 87 |     for (i = 0; i < partial.length; i++) {
 88 |       prev = partial[i - 1] || '';
 89 |       if (prev === '\\') { continue; }
 90 |       char = partial[i];
 91 |       if (!inQuotes && char === ')') { break; }
 92 |       if (char === '"' || char === '\'') { inQuotes = !inQuotes; }
 93 |     }
 94 |     cursor += i + 1;
 95 |     partial = partial.slice(i + 1);
 96 |   }
 97 | });
 98 | 
 99 | function repeat (text, times) {
100 |   var result = '', n;
101 |   while (n) {
102 |     if (n % 2 === 1) {
103 |       result += text;
104 |     }
105 |     if (n > 1) {
106 |       text += text;
107 |     }
108 |     n >>= 1;
109 |   }
110 |   return result;
111 | }
112 | 
113 | function escapeForRegExp (text) { return text.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&'); }
114 | 
115 | var baseblock = md.renderer.rules.code_block;
116 | var baseinline = md.renderer.rules.code_inline;
117 | var basefence = md.renderer.rules.fence;
118 | var basetext = md.renderer.rules.text;
119 | var baserenderInline = md.renderer.renderInline;
120 | var languages = [];
121 | 
122 | md.core.ruler.before('linkify', 'linkify-tokenizer', linkifyTokenizer, {});
123 | md.renderer.rules.heading_open = heading;
124 | md.renderer.rules.code_block = block;
125 | md.renderer.rules.code_inline = inline;
126 | md.renderer.rules.fence = fence;
127 | md.renderer.renderInline = renderInline;
128 | 
129 | hljs.configure({ tabReplace: 2, classPrefix: 'md-code-' });
130 | 
131 | function highlight (encoded, code, detected) {
132 |   var lower = String(detected).toLowerCase();
133 |   var lang = aliases[detected] || detected;
134 |   var escaped = encodeHtmlMarks(code, encoded);
135 |   try {
136 |     var result = hljs.highlight(lang, escaped);
137 |     var unescaped = decodeHtmlMarks(result.value, true, encoded);
138 |     return unescaped;
139 |   } catch (e) {
140 |     return decodeHtmlMarks(encodeHtmlMarks(code, encoded), true, encoded);
141 |   }
142 | }
143 | 
144 | function encode (tag) {
145 |   return tag.replace('<', '&lt;').replace('>', '&gt;');
146 | }
147 | 
148 | function encodeHtmlMarks (code, encoded) {
149 |   var opentag = '<mark>';
150 |   var closetag = '</mark>';
151 |   if (encoded) {
152 |     opentag = encode(opentag);
153 |     closetag = encode(closetag);
154 |   }
155 |   var ropen = new RegExp(opentag, 'g');
156 |   var rclose = new RegExp(closetag, 'g');
157 |   var open = 'highlightmarkisveryliteral';
158 |   var close = 'highlightmarkwasveryliteral';
159 |   return code.replace(ropen, open).replace(rclose, close);
160 | }
161 | 
162 | function decodeHtmlMarks (value, inCode) {
163 |   var ropen = /highlightmarkisveryliteral/g;
164 |   var rclose = /highlightmarkwasveryliteral/g;
165 |   var classes = 'md-mark' + (inCode ? ' md-code-mark' : '');
166 |   var open = '<mark class="' + classes + '">';
167 |   var close = '</mark>';
168 |   return value.replace(ropen, open).replace(rclose, close);
169 | }
170 | 
171 | function heading (tokens, i, options, env, renderer) {
172 |   var token = tokens[i];
173 |   var open = '<' + token.tag;
174 |   var close = '>';
175 |   var contents = read();
176 |   var slug = sluggish(contents);
177 |   if (slug.length) {
178 |     return open + ' id="' + slug + '"' + close;
179 |   }
180 |   return open + close;
181 | 
182 |   function read () {
183 |     var index = i++;
184 |     var next = tokens[index];
185 |     var contents = '';
186 |     while (next && next.type !== 'heading_close') {
187 |       contents += next.content;
188 |       next = tokens[index++ + 1];
189 |     }
190 |     return contents;
191 |   }
192 | }
193 | 
194 | function block (tokens, idx, options, env) {
195 |   var base = baseblock.apply(this, arguments).substr(11); // starts with '<pre><code>'
196 |   var untagged = base.substr(0, base.length - 14);
197 |   var upmarked = upmark(tokens[idx], untagged, 0, env);
198 |   var marked = highlight(true, upmarked);
199 |   var classed = '<pre class="md-code-block"><code class="md-code">' + marked + '</code></pre>\n';
200 |   return classed;
201 | }
202 | 
203 | function inline (tokens, idx, options, env) {
204 |   var base = baseinline.apply(this, arguments).substr(6); // starts with '<code>'
205 |   var untagged = base.substr(0, base.length - 7); // ends with '</code>'
206 |   var upmarked = upmark(tokens[idx], untagged, 1, env);
207 |   var marked = highlight(true, upmarked);
208 |   var classed = '<code class="md-code md-code-inline">' + marked + '</code>';
209 |   return classed;
210 | }
211 | 
212 | function renderInline (tokens, options, env) {
213 |   var result = baserenderInline.apply(this, arguments);
214 |   if (!tokens.length) {
215 |     return result;
216 |   }
217 |   env.flush = true;
218 |   result += upmark(tokens[tokens.length - 1], '', 0, env);
219 |   env.flush = false;
220 |   return result;
221 | }
222 | 
223 | function upmark (token, content, offset, env) {
224 |   return env.markers
225 |     .filter(pastOrPresent)
226 |     .reverse()
227 |     .reduce(considerUpmarking, content);
228 | 
229 |   function considerUpmarking (content, marker) {
230 |     var startOffset = env.flush ? 0 : marker[0] - token.cursorStart;
231 |     var start = Math.max(0, startOffset - offset);
232 |     var markerCode = consumeMarker(marker, env);
233 |     return (
234 |       content.slice(0, start) +
235 |         markerCode +
236 |       content.slice(start)
237 |     );
238 |   }
239 | 
240 |   function pastOrPresent (marker) {
241 |     return marker[0] <= token.cursorEnd;
242 |   }
243 | }
244 | 
245 | function consumeMarker (marker, env) {
246 |   var code = randomCode() + randomCode() + randomCode();
247 |   env.markers.splice(env.markers.indexOf(marker), 1);
248 |   env.markerCodes.push([code, marker[1]]);
249 |   return code;
250 | }
251 | 
252 | function randomCode () {
253 |   return Math.random().toString(18).substr(2).replace(/\d+/g, '');
254 | }
255 | 
256 | function fence (tokens, idx, options, env) {
257 |   var base = basefence.apply(this, arguments).substr(5); // starts with '<pre>'
258 |   var lang = base.substr(0, 6) !== '<code>'; // when the fence has a language class
259 |   var untaggedStart = lang ? base.indexOf('>') + 1 : 6;
260 |   var untagged = base.substr(untaggedStart);
261 |   var upmarked = upmark(tokens[idx], untagged, 0, env);
262 |   var codeTag = lang ? base.substr(0, untaggedStart) : '<code class="md-code">';
263 |   var classed = '<pre class="md-code-block">' + codeTag + upmarked;
264 |   var aliased = classed.replace(ralias, aliasing);
265 |   return aliased;
266 | }
267 | 
268 | function aliasing (all, language) {
269 |   var name = aliases[language] || language || 'unknown';
270 |   var lang = 'md-lang-' + name;
271 |   if (languages.indexOf(lang) === -1) {
272 |     languages.push(lang);
273 |   }
274 |   return ' class="md-code ' + lang + '"';
275 | }
276 | 
277 | function textParser (tokens, idx, options, env) {
278 |   var token = tokens[idx];
279 |   token.content = upmark(token, token.content, 0, env);
280 |   var base = basetext.apply(this, arguments);
281 |   var tokenized = tokenize(base, env.tokenizers);
282 |   return tokenized;
283 | }
284 | 
285 | function linkifyTokenizer (state) {
286 |   tokenizeLinks(state, state.env);
287 | }
288 | 
289 | function tokenize (text, tokenizers) {
290 |   return tokenizers.reduce(use, text);
291 |   function use (result, tok) {
292 |     return result.replace(tok.token, tok.transform);
293 |   }
294 | }
295 | 
296 | function decodeMarkers (html, env) {
297 |   return env.markerCodes.reduce(reducer, html);
298 |   function reducer (html, mcp) {
299 |     return html.replace(mcp[0], mcp[1]);
300 |   }
301 | }
302 | 
303 | function markdown (input, options) {
304 |   var tok = options.tokenizers || [];
305 |   var lin = options.linkifiers || [];
306 |   var valid = input === null || input === void 0 ? '' : String(input);
307 |   var env = {
308 |     tokenizers: tok,
309 |     linkifiers: lin,
310 |     markers: options.markers ? options.markers.sort(asc) : [],
311 |     markerCodes: []
312 |   };
313 |   md.renderer.rules.text = textParser;
314 |   var leftMark = upmark({ cursorStart: 0, cursorEnd: 0 }, '', 0, env);
315 |   var htmlMd = md.render(valid, env);
316 |   env.flush = true;
317 |   var rightMark = upmark({ cursorStart: 0, cursorEnd: Infinity }, '', 0, env);
318 |   var html = leftMark + htmlMd + rightMark;
319 |   return decodeMarkers(decodeHtmlMarks(encodeHtmlMarks(html)), env);
320 | }
321 | 
322 | function asc (a, b) { return a[0] - b[0]; }
323 | 
324 | markdown.parser = md;
325 | markdown.languages = languages;
326 | module.exports = markdown;
327 | 


--------------------------------------------------------------------------------
/test/megamark.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | var fs = require('fs');
  4 | var test = require('tape');
  5 | var megamark = require('..');
  6 | 
  7 | function read (name) {
  8 |   return fs.readFileSync('./test/fixtures/' + name, 'utf8');
  9 | }
 10 | 
 11 | function write (name, data) {
 12 |   return fs.writeFileSync('./test/fixtures/' + name, data);
 13 | }
 14 | 
 15 | test('empty doesn\'t blow up', function (t) {
 16 |   t.equal(megamark(), '');
 17 |   t.end();
 18 | });
 19 | 
 20 | test('code snippets work as expected', function (t) {
 21 |   t.equal(megamark(read('code-snippets.md')), read('code-snippets.html'));
 22 |   t.end();
 23 | });
 24 | 
 25 | test('email link works as expected', function (t) {
 26 |   t.equal(megamark(read('email-example.md')), read('email-example.html'));
 27 |   t.end();
 28 | });
 29 | 
 30 | test('emphasis works as expected', function (t) {
 31 |   t.equal(megamark(read('barkup.md')), read('barkup.html'));
 32 |   t.end();
 33 | });
 34 | 
 35 | test('parsing of ponyfoo articles works as expected', function (t) {
 36 |   t.equal(megamark(read('stop-breaking-the-web.md')), read('stop-breaking-the-web.html'));
 37 |   t.equal(megamark(read('cross-tab-communication.md')), read('cross-tab-communication.html'));
 38 |   t.end();
 39 | });
 40 | 
 41 | test('tokenizing works as expected', function (t) {
 42 |   t.equal(megamark('_@bevacqua_', { tokenizers: [{ token: /(?:^|\s)@([A-z]+)\b/, transform: transform }] }), '<p><em>BEVACQUA</em></p>\n');
 43 |   t.end();
 44 |   function transform (text, username) {
 45 |     return username.toUpperCase();
 46 |   }
 47 | });
 48 | 
 49 | test('tokenizer ignores encoding by default', function (t) {
 50 |   t.equal(megamark('_@bevacqua_', { tokenizers: [{ token: /(?:^|\s)@([A-z]+)\b/, transform: transform }] }), '<p><em><a href="/users/bevacqua">BEVACQUA</a></em></p>\n');
 51 |   t.end();
 52 |   function transform (text, username) {
 53 |     return '<a href="/users/' + username + '">' + username.toUpperCase() + '</a>';
 54 |   }
 55 | });
 56 | 
 57 | test('markdown defaults to ignoring hazardous elements, but that can be overridden', function (t) {
 58 |   t.equal(megamark('<iframe>foo</iframe>'), '');
 59 |   t.equal(megamark('<script>foo</script>'), '');
 60 |   t.equal(megamark('<style>foo</style>'), '');
 61 |   t.equal(megamark('<iframe>foo</iframe>', { sanitizer: { allowedTags: ['p', 'iframe'] } }), '<iframe>foo</iframe>');
 62 |   t.end();
 63 |   function transform (text, username) {
 64 |     return username.toUpperCase();
 65 |   }
 66 | });
 67 | 
 68 | test('tokenizing links allows me to return no content', function (t) {
 69 |   t.equal(megamark('ponyfoo.com', { linkifiers: [linkify] }), '<p></p>\n');
 70 |   t.end();
 71 |   function linkify (href, text) {
 72 |     return '';
 73 |   }
 74 | });
 75 | 
 76 | test('tokenizing links allows me to return plain text content', function (t) {
 77 |   t.equal(megamark('ponyfoo.com', { linkifiers: [linkify] }), '<p>@ponyfoo</p>\n');
 78 |   t.end();
 79 |   function linkify (href, text) {
 80 |     return '@' + text.split('.').shift();
 81 |   }
 82 | });
 83 | 
 84 | test('tokenizing links allows me to return any tags I want', function (t) {
 85 |   t.equal(megamark('ponyfoo.com', { linkifiers: [linkify] }), '<p><em>http://ponyfoo.com</em></p>\n');
 86 |   t.end();
 87 |   function linkify (href, text) {
 88 |     return '<em>' + href + '</em>';
 89 |   }
 90 | });
 91 | 
 92 | test('tokenizing links allows me to ignore _some_ things', function (t) {
 93 |   t.equal(megamark('ponyfoo.com google.com', { linkifiers: [linkify] }), '<p><em>http://ponyfoo.com</em> </p>\n');
 94 |   t.end();
 95 |   function linkify (href, text) {
 96 |     if (/\/\/google\.com/.test(href)) {
 97 |       return '';
 98 |     }
 99 |     return '<em>' + href + '</em>';
100 |   }
101 | });
102 | 
103 | test('tokenizing links allows me to return any tags I want', function (t) {
104 |   t.equal(megamark('http://localhost:9000/bevacqua/stompflow/issues/28', { linkifiers: [linkify] }), '<p><a href="http://localhost:9000/bevacqua/stompflow/issues/28">#28</a></p>\n');
105 |   t.end();
106 |   function linkify (href, text) {
107 |     return '<a href=' + href + '>#' + href.split('/').pop() + '</a>';
108 |   }
109 | });
110 | 
111 | test('tokenizing links doesn\'t break protocol', function (t) {
112 |   t.equal(megamark('//localhost:9000/bevacqua/stompflow/issues/28', { linkifiers: [linkify] }), '<p><a href="//localhost:9000/bevacqua/stompflow/issues/28">#28</a></p>\n');
113 |   t.end();
114 |   function linkify (href, text) {
115 |     return '<a href=' + href + '>#' + href.split('/').pop() + '</a>';
116 |   }
117 | });
118 | 
119 | test('tokenizing links doesn\'t break protocol', function (t) {
120 |   t.equal(megamark('www.stompflow.com/bevacqua/stompflow/issues/28', { linkifiers: [linkify] }), '<p><a href="http://www.stompflow.com/bevacqua/stompflow/issues/28">#28</a></p>\n');
121 |   t.end();
122 |   function linkify (href, text) {
123 |     return '<a href=' + href + '>#' + href.split('/').pop() + '</a>';
124 |   }
125 | });
126 | 
127 | test('tokenizing links doesn\'t break protocol', function (t) {
128 |   t.equal(megamark('https://localhost:9000/bevacqua/stompflow/issues/28', { linkifiers: [linkify] }), '<p><a href="https://localhost:9000/bevacqua/stompflow/issues/28">#28</a></p>\n');
129 |   t.end();
130 |   function linkify (href, text) {
131 |     return '<a href=' + href + '>#' + href.split('/').pop() + '</a>';
132 |   }
133 | });
134 | 
135 | test('links work as expected', function (t) {
136 |   t.equal(
137 |     megamark('ponyfoo.com and them something else'),
138 |     '<p><a href="http://ponyfoo.com">ponyfoo.com</a> and them something else</p>\n'
139 |   );
140 |   t.equal(
141 |     megamark('[asd](http://localhost:3000/author/compose)'),
142 |     '<p><a href="http://localhost:3000/author/compose">asd</a></p>\n'
143 |   );
144 |   t.equal(
145 |     megamark('[asd](/author/compose)'),
146 |     '<p><a href="/author/compose">asd</a></p>\n'
147 |   );
148 |   t.equal(
149 |     megamark('[asd][1]\n\n[1]: /author/compose'),
150 |     '<p><a href="/author/compose">asd</a></p>\n'
151 |   );
152 |   t.equal(
153 |     megamark('Get half off my **JavaScript Application Design** book today! Enter code **dotd072115au** at [bevacqua.io/bf/book](http://localhost:3000/author/compose) when checking out. If you run into any issues, let me know.'),
154 |     '<p>Get half off my <strong>JavaScript Application Design</strong> book today! Enter code <strong>dotd072115au</strong> at <a href="http://localhost:3000/author/compose">bevacqua.io/bf/book</a> when checking out. If you run into any issues, let me know.</p>\n'
155 |   );
156 |   t.end();
157 | });
158 | 
159 | test('italics work as expected', function (t) {
160 |   t.equal(megamark('_some_'), '<p><em>some</em></p>\n');
161 |   t.equal(megamark('_(some)_'), '<p><em>(some)</em></p>\n');
162 |   t.equal(megamark('_(#)_'), '<p><em>(#)</em></p>\n');
163 |   t.equal(megamark('_(#)_.'), '<p><em>(#)</em>.</p>\n');
164 |   t.equal(megamark('_(#)_.', {}), '<p><em>(#)</em>.</p>\n');
165 |   t.end();
166 | });
167 | 
168 | test('headings work as expected', function (t) {
169 |   t.equal(megamark('# foo'), '<h1 id="foo">foo</h1>\n');
170 |   t.equal(megamark('## foo'), '<h2 id="foo">foo</h2>\n');
171 |   t.equal(megamark('## **foo**'), '<h2 id="foo"><strong>foo</strong></h2>\n');
172 |   t.equal(megamark('## **f _o_ o**'), '<h2 id="f-o-o"><strong>f <em>o</em> o</strong></h2>\n');
173 |   t.equal(megamark('<h1></h1>'), '<h1></h1>');
174 |   t.equal(megamark('<h1>a</h1>'), '<h1>a</h1>');
175 |   t.equal(megamark('<h1 id="foo">bar</h1>'), '<h1 id="foo">bar</h1>');
176 |   t.end();
177 | });
178 | 
179 | test('mark highlights nodes, even within code', function (t) {
180 |   t.equal(
181 |     megamark('foo is <mark>marked..</mark>\n\n```html\n<mark><span>foo</span></mark>;\n```'),
182 |     '<p>foo is <mark class="md-mark">marked…</mark></p>\n<pre class="md-code-block"><code class="md-code md-lang-xml"><mark class="md-mark md-code-mark"><span class="md-code-tag">&lt;<span class="md-code-title">span</span>&gt;</span>foo<span class="md-code-tag">&lt;/<span class="md-code-title">span</span>&gt;</span></mark>;\n</code></pre>\n'
183 |   );
184 |   t.equal(
185 |     megamark('foo is <mark>marked..</mark>\n\n```js\n<mark><span>foo</span></mark>;\n```'),
186 |     '<p>foo is <mark class="md-mark">marked…</mark></p>\n<pre class="md-code-block"><code class="md-code md-lang-javascript"><mark class="md-mark md-code-mark">&lt;span&gt;foo&lt;/span&gt;</mark>;\n</code></pre>\n'
187 |   );
188 |   t.equal(
189 |     megamark('foo is <mark>marked..</mark>\n\n```\n<mark><span>foo</span></mark>;\n```'),
190 |     '<p>foo is <mark class="md-mark">marked…</mark></p>\n<pre class="md-code-block"><code class="md-code"><mark class="md-mark md-code-mark"><span>foo</span></mark>;\n</code></pre>\n'
191 |   );
192 |   t.equal(
193 |     megamark('asd\n\n`var foo = 1; <mark>foo = -10</mark>;`\n'),
194 |     '<p>asd</p>\n<p><code class="md-code md-code-inline">var foo = 1; <mark class="md-mark md-code-mark">foo = -10</mark>;</code></p>\n'
195 |   );
196 |   t.equal(
197 |     megamark('asd\n\n    <mark><span>foo</span></mark>'),
198 |     '<p>asd</p>\n<pre class="md-code-block"><code class="md-code"><mark class="md-mark md-code-mark">&lt;span&gt;foo&lt;/span&gt;</mark></code></pre>\n'
199 |   );
200 |   t.end();
201 | });
202 | 
203 | test('megamark understands markers', function (t) {
204 |   t.equal(megamark('_foo_', { markers: [[0, '[START]'], [0, '[END]']] }), '[START][END]<p><em>foo</em></p>\n');
205 |   t.equal(megamark('_foo_', { markers: [[5, '[START]'], [5, '[END]']] }), '<p><em>foo</em>[START][END]</p>\n');
206 |   t.equal(megamark('_foo_', { markers: [[1, '[START]'], [5, '[END]']] }), '<p><em>[START]foo</em>[END]</p>\n');
207 |   t.equal(megamark('foo', { markers: [[1, '[START]'], [2, '[END]']] }), '<p>f[START]o[END]o</p>\n');
208 |   t.equal(megamark('**foo**', { markers: [[1, '[START]'], [5, '[END]']] }), '<p><strong>[START]foo[END]</strong></p>\n');
209 |   t.equal(megamark('**foo**', { markers: [[2, '[START]'], [4, '[END]']] }), '<p><strong>[START]fo[END]o</strong></p>\n');
210 |   t.equal(megamark('`foo`\n\n> *bar*\n\n**baz**', { markers: [[2, '[START]'], [5, '[END]']] }), '<p><code class="md-code md-code-inline">f[START]oo[END]</code></p>\n<blockquote>\n<p><em>bar</em></p>\n</blockquote>\n<p><strong>baz</strong></p>\n');
211 |   t.equal(megamark('# markdown', { markers: [[3, '[START]'], [6, '[END]']] }), '<h1 id="markdown">m[START]ark[END]down</h1>\n');
212 |   t.equal(megamark('### markdown', { markers: [[5, '[START]'], [8, '[END]']] }), '<h3 id="markdown">m[START]ark[END]down</h3>\n');
213 |   t.equal(megamark('### markdown\n\n\n\n\n\n\n\n\nfoo bar baz', { markers: [[20, '[START]'], [23, '[END]']] }), '<h3 id="markdown">markdown</h3>\n<p>[START]fo[END]o bar baz</p>\n');
214 |   t.equal(megamark('<a href="/foo">bar</a>', { markers: [[16, '[START]'], [18, '[END]']] }), '<p><a href="/foo">b[START]ar[END]</a></p>\n');
215 |   t.equal(megamark('[bar](/foo)', { markers: [[2, '[START]'], [4, '[END]']] }), '<p><a href="/foo">b[START]ar[END]</a></p>\n');
216 |   t.equal(megamark('[bar][a]\n\n[a]: /foo', { markers: [[2, '[START]'], [4, '[END]']] }), '<p><a href="/foo">b[START]ar[END]</a></p>\n');
217 |   t.equal(megamark('![alt](/foo)', { markers: [[2, '[START]'], [4, '[END]']] }), '<p><img src="/foo" alt="[START]al[END]t"/></p>\n');
218 |   t.equal(megamark('![alt][a]\n\n[a]: /foo', { markers: [[2, '[START]'], [4, '[END]']] }), '<p><img src="/foo" alt="[START]al[END]t"/></p>\n');
219 |   t.equal(megamark('<img src="/foo" />', { markers: [[2, '[START]'], [4, '[END]']] }), '<img src="/foo"/>[START][END]');
220 |   t.end();
221 | });
222 | 
223 | test('megamark understands markers in complex markdown', function (t) {
224 |   t.equal(megamark(read('woofmark-sample.md'), { markers: [[103, '[START]'], [172, '[END]']] }), read('woofmark-sample.html'));
225 |   t.end();
226 | });
227 | 
228 | test('megamark ignores html in code', function (t) {
229 |   t.equal(megamark('`<strong>bar</strong>`'),
230 |     '<p><code class="md-code md-code-inline">&lt;strong&gt;bar&lt;/strong&gt;</code></p>\n');
231 | 
232 |   t.equal(megamark('`<mark>foo</mark> asd asd  <strong>bar</strong>`'),
233 |     '<p><code class="md-code md-code-inline"><mark class="md-mark md-code-mark">foo</mark> asd asd &lt;strong&gt;bar&lt;/strong&gt;</code></p>\n');
234 |   t.equal(megamark('    <mark>foo</mark> asd asd  <strong>bar</strong>'),
235 |     '<pre class="md-code-block"><code class="md-code"><mark class="md-mark md-code-mark">foo</mark> asd asd  &lt;strong&gt;bar&lt;/strong&gt;</code></pre>\n');
236 | 
237 |   t.equal(megamark('    <!doctype html>\n    <html><div>foo</div></html>'),
238 |     '<pre class="md-code-block"><code class="md-code">&lt;!doctype html&gt;\n&lt;html&gt;&lt;div&gt;foo&lt;/div&gt;&lt;/html&gt;</code></pre>\n');
239 |   t.end();
240 | });
241 | 


--------------------------------------------------------------------------------
/test/fixtures/stop-breaking-the-web.md:
--------------------------------------------------------------------------------
  1 | # Stop Breaking the Web
  2 | 
  3 | The year is 2014, a ninja rockstar band goes up against the now long-forgotten [progressive enhancement][1] technique, forsaking the origins of the web and everything they once stood for. This article is where I rant about how **we are breaking the web**, the not-immediately-obvious reasons why we should stop doing this, and how _not breaking the web would be a great thing_.
  4 | 
  5 | **TL;DR** _We are crushing the web. Dedicated client-side rendering sucks. Polyfills are used for all the wrong reasons. Those hideous-looking hash routers are bad and we should feel bad. We have been telling each other for years that progressive enhancement is great, and yet we're doing very little about it!_
  6 | 
  7 | Here's hoping the screenshot below corresponds merely to a publicity stunt, attempting to grab the tech media world by surprise. That being said, the fact that _we're not certain_ about whether this is a ruse or a permanent decision makes me cringe for the future of the web.
  8 | 
  9 | ![tacobell.png][19]
 10 | 
 11 | <sub>Taco Bell _#onlyintheapp_ — is it a **clever publicity stunt to drive app downloads or a symptom of the profusely bleeding web?**</sub>
 12 | 
 13 | _Disclaimer: This article is **not a rant about Angular 2.0**. I started forming these thoughts a while ago, before the Angular 2.0 revelations. The roadmap for Angular merely happened to coincide with the posting of this article. If anything, those news reinforce the [points others have made against it][5], but the statement behind this article goes far beyond the myriad of breaking changes in Angular's public API._
 14 | 
 15 | It makes me sad to point out that **we as a community have failed the web**. Whatever happened to [progressive enhancement][1]? You know, that simple rule where you are supposed to **put content at the forefront**. Everything else is secondary to content, right? People want to see your content first. Once the content is in place, maybe they'll want to be able to interact with it. However, if content isn't there first, because [your page is too slow][2], or because you load fonts synchronously before humans can read anything, or because you decide to use client-side rendering exclusively, then **humans are pretty much screwed**. _Right?_
 16 | 
 17 | > Sure, humans have faster Internet connections now. Or do they? A lot of humans access the web on **mobile connections such as 2G and 3G**, and they expect your site to be _just as fast as on desktop_. That'll hardly be the case if you're blocking content on a JavaScript download.
 18 | 
 19 | Increasingly, this is becoming the norm. Fuck humans, we need all these awesome frameworks to make the web great. Wait, we do need humans. They have money, metadata, and stuff. Oh I know, let's give them client-side routing even if they're on IE6. That's bound to make them happy, right? Oh, stupid IE6 doesn't support the history API. Well, screw IE6. What? [IE9 doesn't support the history API][9] either? Well, I'll just support IE10. Wait, that's bad, **I'll use a hash router** and support IE all the way down to IE6! Yes, what a wonderful world, let's make our site accessible through routes like `/#/products/nintendo-game-cube` and then require JavaScript to be enabled for our view router to work, and let's also render the views in the client-side alone. Yes, _that_ will do it!
 20 | 
 21 | Meanwhile, we add tons of weight to our pages, levelling the field and making the experience in modern browsers worse as a result of attempting to make the experience in older browsers better. There's a problem with this fallacy, though. People using older browsers **are not expecting the newest features**. They're content with what they have. That's the whole reason why they're using an older browser in the first place. Instead of attempting to give those users a better experience (and usually failing miserably), you should enable features only if they're currently available on the target browser, instead of creating hacks around those limitations.
 22 | 
 23 | Humans using older browsers would be more than fine with your site if you only kept the server-side rendering part, so they don't really need your fancy-and-terribly-complex [maintainability-nightmare][3] of a hash router. But no, wait! Hash routing is [so-and-so awesome][4], right? Who needs server-side rendering!
 24 | 
 25 | Okay fine let's assume you agree with me. Hash routing sucks. It does nothing to help modern browsers _(except slowing down the experience, [it does do that!][6])_ and everything to complicate development and confuse humans who are using older browsers.
 26 | 
 27 | ## Do we even care about the web as much as we say we do?
 28 | 
 29 | Recently, someone published an article on Medium titled ["What's wrong with Angular.js"][5]. It infuriates me that we don't seem to care _at all_ about server-side rendering, as long as we are able to develop applications using our favorite framework. While every single other point was refuted in some way or another, the point about server-side rendering went almost unnoticed. As if nobody even cared or even understood the implications.
 30 | 
 31 | > 6\. No server side rendering without obscure hacks. Never. You can’t fix broken design. Bye bye [isomorphic web apps][7].
 32 | 
 33 | The only place where I would conceive using a framework that relies solely on client-side rendering is for developing prototypes or internal backend apps _(just like how we use Bootstrap mostly for internal stuff)_. In these cases, these negligent frameworks are great because they boost productivity at virtually no cost, since no humans get harmed in the process. Besides the few use cases where neglecting server-side rendering isn't going to affect any human beings, doing so is undisputably **slow, unacceptable, backwards, and negligent**.
 34 | 
 35 | It is slow because the human now has to download all of your markup, your CSS, and your JavaScript before the JavaScript is able to render the view the user expected you to deliver in the first place. When did we agree to trade performance for frameworks?
 36 | 
 37 | It is backwards because you should be **delivering the content in human-viewable form first**, and not after every single render blocking request out there finishes loading. This means that a human-ready HTML view should be rendered in the server-side and served to the human, then you can add your fancy JavaScript magic on top of that, while the user is busy making sense of the information you've presented them with.
 38 | 
 39 | > Always keep humans busy, or they'll get uneasy.
 40 | 
 41 | It is negligent because we have been telling each other to avoid this same situation for years, but using other words. We've been telling ourselves about the importance of deferring script loading by pushing `<script>` tags to the bottom of the page, and maybe even tack on an `async` attribute, so that they load last. Using client-side rendering without backing it up with server-side rendering means that those scripts you've pushed to the bottom of your page are now harming your experience, because loading is delayed and without JavaScript you won't have any content to show for. Don't start moving your `<script>` tags to the `<head>` just yet. Just understand how far-reaching the negative implications of using client-side rendering are, when server-side rendering isn't in the picture.
 42 | 
 43 | But don't take my word for it, here's what Twitter had to say. Remember Twitter? Yeah, [they switched to shared-rendering back in mid 2012][6] and never looked back.
 44 | 
 45 | > Looking at the components that make up _[the time to first tweet]_ measurement, we discovered that the raw parsing and execution of JavaScript caused massive outliers in perceived rendering speed. In our fully client-side architecture, you don’t see anything until our JavaScript is downloaded and executed. The problem is further exacerbated if you do not have a high-specification machine or if you’re running an older browser. The bottom line is that a client-side architecture leads to slower performance because most of the code is being executed on our users’ machines rather than our own.
 46 | >
 47 | > There are a variety of options for improving the performance of our JavaScript, but we wanted to do even better. We took the execution of JavaScript completely out of our render path. By rendering our page content on the server and deferring all JavaScript execution until well after that content has been rendered, we’ve dropped the time to first Tweet to one-fifth of what it was.
 48 | 
 49 | We are [worrying about the wrong things][10]. Yesterday, [Henrik Joreteg][11] raised a few valid concerns about the dire future of AngularJS. These things are disputable, though. You may like the changes, you may think they're for the best, but what are you really getting out of the large refactor in the road ahead of you? Truth be told, Angular is an excellent framework in terms of developer productivity, and **it is** "sponsored by Google", as in _they maintain the thing_. On the flip side, Angular's barrier of entry is tremendously high and you have nothing to show for it when you have to jump ship.
 50 | 
 51 | We are doing things backwards. We are treating modern browsers as _"the status quo"_, and logically if someone doesn't conform to "_the status quo"_, we'll be super helpful and add our awesome behavioral polyfills. This way, _at least_ they get a hash router!
 52 | 
 53 | > **We are worrying about the wrong things.**
 54 | 
 55 | ## Emphasize Content First
 56 | 
 57 | What we should be doing instead is going back to basics. Let content down the wire **as quickly as possible**, using server-side rendering. Then add any extra functionality through JavaScript _once the page has already loaded_, and the content is viewable and usable for the human. If you want to include a feature older browsers don't have access to, such as the history API, first **think if it makes sense to do it at all**. Maybe your users are better off without it. In the history API case, maybe it's best to _let older browsers stick to the request-response model_, rather than trying to cram a history API mock onto them by means of a hash router.
 58 | 
 59 | The same principle applies to other aspects of web development. Need people to be able to post a comment? Provide a `<form>` and use AJAX in those cases where JavaScript is enabled and `XMLHttpRequest` is well supported. Want to defer style loading as to avoid render-blocking and inline the critical CSS instead? That's awesome, but please use a `<noscript>` tag as a fallback for those who disabled JavaScript. Otherwise you'll risk breaking the styles for those humans!
 60 | 
 61 | Did I mention the obviously broken aspect of hash routing where you can't do server-side rendering, as you won't know the hash part of the request on the server? That's right, Twitter has to maintain dedicated client-side rendering for the foreseeable future, as long as hash-banged requests are still hitting their servers.
 62 | 
 63 | ## Progressively Enhance All The Things!
 64 | 
 65 | In summary, we should stop devising immensely clever client-side rendering solutions that are simply unable to conjure up any sort of server-side rendering. Besides **vomit-inducing "strategies"** such as using PhantomJS to render the client-side view on the server-side, that is. I'm sure nobody is in love with the ["sneak peak" for Angular 2.0][8] anyways, so many breaking changes for virtually no benefit. Oh wait, there are benefits, you say? I couldn't hear you through sound of browser support being cut down.
 66 | 
 67 | > I guess that's what you get when you don't care about progressive enhancement.
 68 | 
 69 | The next time you pick up a project, don't just **blindly throw AngularJS, Bootstrap and jQuery at it**, and call it a day. Figure out ways to do shared rendering, use React or Taunus, or something else that allows you to do shared rendering without repeating yourself. Otherwise **don't do client-side rendering at all**.
 70 | 
 71 | **Strive for simplicity. Use progressive enhancement.** Don't do it for people who disable JavaScript. Don't do it for people who use older browsers. Don't even do it _just to be thorough_. Do it because you acknowledge the important of delivering content first. Do it because you acknowledge that **your site doesn't have to look the same in every device and browser _ever_**. Do it because it improves user experience. Do it because people on mobile networks shouldn't have to suffer the painful experience of a broken web.
 72 | 
 73 | Build up from the pillars of the web, instead of doing everything backwards and demanding your fancy web 2.0 JavaScript frameworks to be loaded, parsed, and executed before you can even begin to consider rendering human-digestible content.
 74 | 
 75 | Here's a checklist you might need.
 76 | 
 77 | - HTML first, get meaningful markup to the human being as soon as possible
 78 | - Deliver some CSS, [inline critical path CSS][2] _(hey, that one came from Google, too!)_
 79 | - Defer the rest of the CSS until `onload` through JavaScript, but provide a fallback using `<noscript>`
 80 | - Defer below the fold images
 81 | - Defer font loading
 82 | - Defer all the JavaScript
 83 | - **Never again rely on client-side rendering alone**
 84 | - Prioritize content delivery
 85 | - Cache static assets
 86 | - Experiment with caching dynamic assets
 87 | - Cache database queries
 88 | - **Cache all the things**
 89 | 
 90 | Also, use `<form>` elements first, then build some AJAX on top of that. No! It's not for the no-JavaScript crazies. If the JavaScript is still loading, your site will be useless unless you have `<form>` elements in place to guarantee the functionality will be available. Some people just have to deal with slow mobile connections, embrace that. You can [use Google Chrome to emulate mobile connections][12], for example.
 91 | 
 92 | Don't lock yourself into a comprehensive technology that may just die within the next few months and leave you stranded. With [progressive enhancement][1] you'll never go wrong. Progressive enhancement means your code will always work, because you'll always focus on providing a minimal experience first, and then adding features, functionality, and behavior on top of the content.
 93 | 
 94 | Do use a framework, but look into frameworks that are **progressive-enhancement-friendly**, such as [Taunus][14], [hyperspace][17], [React][15], or Backbone with [Rendr][16]. All of these somehow allow you to do shared rendering, although the [Rendr][16] solution is kind of awkward, [it does work][18]. Both Taunus and `hyperspace` let you do things _"the modular way"_ as they are surrounded by small modules you can take advantage of. React has its own kind of awful, but at least you can use if for server-side rendering, and at least Facebook _does_ use it.
 95 | 
 96 | Do look into ways of developing more modular architectures. Progressive enhancement doesn't mean you'll get a monolithic application as a result. Quite the contrary really. Progressive means that you'll get an application that builds upon the principles of the web. It means that your application will work even when JavaScript is disabled, for the most part. It may even be missing a few core aspects of its functionality, say if you forget to add a `<form>` fallback in an important part of your site's experience.
 97 | 
 98 | Even that would be okay, because you'd have learned the value of progressive enhancement, and you could add that `<form>`, having your site be a little more lenient with older browsers and humans using mobile phones. You'd have learned not to render your application on the client-side alone, and you'd use shared-rendering or even server-side rendering instead. You'd have learned the value of the little things, like using `<noscript>` tags or [setting up OpenSearch][13]. You'd have learned to respect the web. You'd have gotten back on the road of those who truly care about the web.
 99 | 
100 | ### You'd have learned to stop breaking the web.
101 | 
102 |   [1]: http://alistapart.com/article/understandingprogressiveenhancement "Understanding Progressive Enhancement"
103 |   [2]: /articles/critical-path-performance-optimization "Critical Path Performance Optimization at Pony Foo"
104 |   [3]: http://danwebb.net/2011/5/28/it-is-about-the-hashbangs "It is about the hashbangs"
105 |   [4]: http://mtrpcic.net/2011/02/fragment-uris-theyre-not-as-bad-as-you-think-really/ "Hashbang URIs – They’re not as bad as you think; really."
106 |   [5]: https://medium.com/este-js-framework/whats-wrong-with-angular-js-97b0a787f903 "What's wrong with Angular.js on Medium"
107 |   [6]: https://blog.twitter.com/2012/improving-performance-on-twittercom "Improving performance on twitter.com"
108 |   [7]: http://nerds.airbnb.com/isomorphic-javascript-future-web-apps/ "Isomorphic JavaScript: The Future of Web Apps"
109 |   [8]: http://jaxenter.com/angular-2-0-112094.html "A sneak peek at the radically new Angular 2.0"
110 |   [9]: http://caniuse.com/#feat=history "Can I Use The History API?"
111 |   [10]: https://blog.andyet.com/2014/10/29/optimize-for-change-its-the-only-constant "Optimize for change. It’s the only constant."
112 |   [11]: https://twitter.com/HenrikJoreteg "@HenrikJoreteg on Twitter"
113 |   [12]: http://www.elijahmanor.com/enhanced-chrome-emulation-tools/ "Enhanced Google Chrome Emulation Tools"
114 |   [13]: /articles/implementing-opensearch "Implementing OpenSearch"
115 |   [14]: https://github.com/bevacqua/taunus "bevacqua/taunus on GitHub"
116 |   [15]: https://github.com/facebook/react "facebook/react on GitHub"
117 |   [16]: https://github.com/rendrjs/rendr "rendrjs/rendr on GitHub"
118 |   [17]: http://substack.net/shared_rendering_in_node_and_the_browser "Shared rendering in node and the browser"
119 |   [18]: https://github.com/buildfirst/buildfirst/tree/master/ch07/11_entourage "Entourage: Shared Rendering with Rendr"
120 |   [19]: http://i.imgur.com/YzXGW5g.png
121 | 


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/test/fixtures/stop-breaking-the-web.html:
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 1 | <h1 id="stop-breaking-the-web">Stop Breaking the Web</h1>
 2 | <p>The year is 2014, a ninja rockstar band goes up against the now long-forgotten <a href="http://alistapart.com/article/understandingprogressiveenhancement" title="Understanding Progressive Enhancement">progressive enhancement</a> technique, forsaking the origins of the web and everything they once stood for. This article is where I rant about how <strong>we are breaking the web</strong>, the not-immediately-obvious reasons why we should stop doing this, and how <em>not breaking the web would be a great thing</em>.</p>
 3 | <p><strong>TL;DR</strong> <em>We are crushing the web. Dedicated client-side rendering sucks. Polyfills are used for all the wrong reasons. Those hideous-looking hash routers are bad and we should feel bad. We have been telling each other for years that progressive enhancement is great, and yet we’re doing very little about it!</em></p>
 4 | <p>Here’s hoping the screenshot below corresponds merely to a publicity stunt, attempting to grab the tech media world by surprise. That being said, the fact that <em>we’re not certain</em> about whether this is a ruse or a permanent decision makes me cringe for the future of the web.</p>
 5 | <p><img src="http://i.imgur.com/YzXGW5g.png" alt="tacobell.png"/></p>
 6 | <p><sub>Taco Bell <em>#onlyintheapp</em> — is it a <strong>clever publicity stunt to drive app downloads or a symptom of the profusely bleeding web?</strong></sub></p>
 7 | <p><em>Disclaimer: This article is <strong>not a rant about Angular 2.0</strong>. I started forming these thoughts a while ago, before the Angular 2.0 revelations. The roadmap for Angular merely happened to coincide with the posting of this article. If anything, those news reinforce the <a href="https://medium.com/este-js-framework/whats-wrong-with-angular-js-97b0a787f903" title="What&#x27;s wrong with Angular.js on Medium">points others have made against it</a>, but the statement behind this article goes far beyond the myriad of breaking changes in Angular’s public API.</em></p>
 8 | <p>It makes me sad to point out that <strong>we as a community have failed the web</strong>. Whatever happened to <a href="http://alistapart.com/article/understandingprogressiveenhancement" title="Understanding Progressive Enhancement">progressive enhancement</a>? You know, that simple rule where you are supposed to <strong>put content at the forefront</strong>. Everything else is secondary to content, right? People want to see your content first. Once the content is in place, maybe they’ll want to be able to interact with it. However, if content isn’t there first, because <a href="/articles/critical-path-performance-optimization" title="Critical Path Performance Optimization at Pony Foo">your page is too slow</a>, or because you load fonts synchronously before humans can read anything, or because you decide to use client-side rendering exclusively, then <strong>humans are pretty much screwed</strong>. <em>Right?</em></p>
 9 | <blockquote>
10 | <p>Sure, humans have faster Internet connections now. Or do they? A lot of humans access the web on <strong>mobile connections such as 2G and 3G</strong>, and they expect your site to be <em>just as fast as on desktop</em>. That’ll hardly be the case if you’re blocking content on a JavaScript download.</p>
11 | </blockquote>
12 | <p>Increasingly, this is becoming the norm. Fuck humans, we need all these awesome frameworks to make the web great. Wait, we do need humans. They have money, metadata, and stuff. Oh I know, let’s give them client-side routing even if they’re on IE6. That’s bound to make them happy, right? Oh, stupid IE6 doesn’t support the history API. Well, screw IE6. What? <a href="http://caniuse.com/#feat=history" title="Can I Use The History API?">IE9 doesn’t support the history API</a> either? Well, I’ll just support IE10. Wait, that’s bad, <strong>I’ll use a hash router</strong> and support IE all the way down to IE6! Yes, what a wonderful world, let’s make our site accessible through routes like <code class="md-code md-code-inline">/#/products/nintendo-game-cube</code> and then require JavaScript to be enabled for our view router to work, and let’s also render the views in the client-side alone. Yes, <em>that</em> will do it!</p>
13 | <p>Meanwhile, we add tons of weight to our pages, levelling the field and making the experience in modern browsers worse as a result of attempting to make the experience in older browsers better. There’s a problem with this fallacy, though. People using older browsers <strong>are not expecting the newest features</strong>. They’re content with what they have. That’s the whole reason why they’re using an older browser in the first place. Instead of attempting to give those users a better experience (and usually failing miserably), you should enable features only if they’re currently available on the target browser, instead of creating hacks around those limitations.</p>
14 | <p>Humans using older browsers would be more than fine with your site if you only kept the server-side rendering part, so they don’t really need your fancy-and-terribly-complex <a href="http://danwebb.net/2011/5/28/it-is-about-the-hashbangs" title="It is about the hashbangs">maintainability-nightmare</a> of a hash router. But no, wait! Hash routing is <a href="http://mtrpcic.net/2011/02/fragment-uris-theyre-not-as-bad-as-you-think-really/" title="Hashbang URIs &#x2013; They&#x2019;re not as bad as you think; really.">so-and-so awesome</a>, right? Who needs server-side rendering!</p>
15 | <p>Okay fine let’s assume you agree with me. Hash routing sucks. It does nothing to help modern browsers <em>(except slowing down the experience, <a href="https://blog.twitter.com/2012/improving-performance-on-twittercom" title="Improving performance on twitter.com">it does do that!</a>)</em> and everything to complicate development and confuse humans who are using older browsers.</p>
16 | <h2 id="do-we-even-care-about-the-web-as-much-as-we-say-we-do">Do we even care about the web as much as we say we do?</h2>
17 | <p>Recently, someone published an article on Medium titled <a href="https://medium.com/este-js-framework/whats-wrong-with-angular-js-97b0a787f903" title="What&#x27;s wrong with Angular.js on Medium">“What’s wrong with Angular.js”</a>. It infuriates me that we don’t seem to care <em>at all</em> about server-side rendering, as long as we are able to develop applications using our favorite framework. While every single other point was refuted in some way or another, the point about server-side rendering went almost unnoticed. As if nobody even cared or even understood the implications.</p>
18 | <blockquote>
19 | <p>6. No server side rendering without obscure hacks. Never. You can’t fix broken design. Bye bye <a href="http://nerds.airbnb.com/isomorphic-javascript-future-web-apps/" title="Isomorphic JavaScript: The Future of Web Apps">isomorphic web apps</a>.</p>
20 | </blockquote>
21 | <p>The only place where I would conceive using a framework that relies solely on client-side rendering is for developing prototypes or internal backend apps <em>(just like how we use Bootstrap mostly for internal stuff)</em>. In these cases, these negligent frameworks are great because they boost productivity at virtually no cost, since no humans get harmed in the process. Besides the few use cases where neglecting server-side rendering isn’t going to affect any human beings, doing so is undisputably <strong>slow, unacceptable, backwards, and negligent</strong>.</p>
22 | <p>It is slow because the human now has to download all of your markup, your CSS, and your JavaScript before the JavaScript is able to render the view the user expected you to deliver in the first place. When did we agree to trade performance for frameworks?</p>
23 | <p>It is backwards because you should be <strong>delivering the content in human-viewable form first</strong>, and not after every single render blocking request out there finishes loading. This means that a human-ready HTML view should be rendered in the server-side and served to the human, then you can add your fancy JavaScript magic on top of that, while the user is busy making sense of the information you’ve presented them with.</p>
24 | <blockquote>
25 | <p>Always keep humans busy, or they’ll get uneasy.</p>
26 | </blockquote>
27 | <p>It is negligent because we have been telling each other to avoid this same situation for years, but using other words. We’ve been telling ourselves about the importance of deferring script loading by pushing <code class="md-code md-code-inline">&lt;script&gt;</code> tags to the bottom of the page, and maybe even tack on an <code class="md-code md-code-inline">async</code> attribute, so that they load last. Using client-side rendering without backing it up with server-side rendering means that those scripts you’ve pushed to the bottom of your page are now harming your experience, because loading is delayed and without JavaScript you won’t have any content to show for. Don’t start moving your <code class="md-code md-code-inline">&lt;script&gt;</code> tags to the <code class="md-code md-code-inline">&lt;head&gt;</code> just yet. Just understand how far-reaching the negative implications of using client-side rendering are, when server-side rendering isn’t in the picture.</p>
28 | <p>But don’t take my word for it, here’s what Twitter had to say. Remember Twitter? Yeah, <a href="https://blog.twitter.com/2012/improving-performance-on-twittercom" title="Improving performance on twitter.com">they switched to shared-rendering back in mid 2012</a> and never looked back.</p>
29 | <blockquote>
30 | <p>Looking at the components that make up <em>[the time to first tweet]</em> measurement, we discovered that the raw parsing and execution of JavaScript caused massive outliers in perceived rendering speed. In our fully client-side architecture, you don’t see anything until our JavaScript is downloaded and executed. The problem is further exacerbated if you do not have a high-specification machine or if you’re running an older browser. The bottom line is that a client-side architecture leads to slower performance because most of the code is being executed on our users’ machines rather than our own.</p>
31 | <p>There are a variety of options for improving the performance of our JavaScript, but we wanted to do even better. We took the execution of JavaScript completely out of our render path. By rendering our page content on the server and deferring all JavaScript execution until well after that content has been rendered, we’ve dropped the time to first Tweet to one-fifth of what it was.</p>
32 | </blockquote>
33 | <p>We are <a href="https://blog.andyet.com/2014/10/29/optimize-for-change-its-the-only-constant" title="Optimize for change. It&#x2019;s the only constant.">worrying about the wrong things</a>. Yesterday, <a href="https://twitter.com/HenrikJoreteg" title="@HenrikJoreteg on Twitter">Henrik Joreteg</a> raised a few valid concerns about the dire future of AngularJS. These things are disputable, though. You may like the changes, you may think they’re for the best, but what are you really getting out of the large refactor in the road ahead of you? Truth be told, Angular is an excellent framework in terms of developer productivity, and <strong>it is</strong> “sponsored by Google”, as in <em>they maintain the thing</em>. On the flip side, Angular’s barrier of entry is tremendously high and you have nothing to show for it when you have to jump ship.</p>
34 | <p>We are doing things backwards. We are treating modern browsers as <em>“the status quo”</em>, and logically if someone doesn’t conform to &quot;<em>the status quo&quot;</em>, we’ll be super helpful and add our awesome behavioral polyfills. This way, <em>at least</em> they get a hash router!</p>
35 | <blockquote>
36 | <p><strong>We are worrying about the wrong things.</strong></p>
37 | </blockquote>
38 | <h2 id="emphasize-content-first">Emphasize Content First</h2>
39 | <p>What we should be doing instead is going back to basics. Let content down the wire <strong>as quickly as possible</strong>, using server-side rendering. Then add any extra functionality through JavaScript <em>once the page has already loaded</em>, and the content is viewable and usable for the human. If you want to include a feature older browsers don’t have access to, such as the history API, first <strong>think if it makes sense to do it at all</strong>. Maybe your users are better off without it. In the history API case, maybe it’s best to <em>let older browsers stick to the request-response model</em>, rather than trying to cram a history API mock onto them by means of a hash router.</p>
40 | <p>The same principle applies to other aspects of web development. Need people to be able to post a comment? Provide a <code class="md-code md-code-inline">&lt;form&gt;</code> and use AJAX in those cases where JavaScript is enabled and <code class="md-code md-code-inline">XMLHttpRequest</code> is well supported. Want to defer style loading as to avoid render-blocking and inline the critical CSS instead? That’s awesome, but please use a <code class="md-code md-code-inline">&lt;noscript&gt;</code> tag as a fallback for those who disabled JavaScript. Otherwise you’ll risk breaking the styles for those humans!</p>
41 | <p>Did I mention the obviously broken aspect of hash routing where you can’t do server-side rendering, as you won’t know the hash part of the request on the server? That’s right, Twitter has to maintain dedicated client-side rendering for the foreseeable future, as long as hash-banged requests are still hitting their servers.</p>
42 | <h2 id="progressively-enhance-all-the-things">Progressively Enhance All The Things!</h2>
43 | <p>In summary, we should stop devising immensely clever client-side rendering solutions that are simply unable to conjure up any sort of server-side rendering. Besides <strong>vomit-inducing “strategies”</strong> such as using PhantomJS to render the client-side view on the server-side, that is. I’m sure nobody is in love with the <a href="http://jaxenter.com/angular-2-0-112094.html" title="A sneak peek at the radically new Angular 2.0">“sneak peak” for Angular 2.0</a> anyways, so many breaking changes for virtually no benefit. Oh wait, there are benefits, you say? I couldn’t hear you through sound of browser support being cut down.</p>
44 | <blockquote>
45 | <p>I guess that’s what you get when you don’t care about progressive enhancement.</p>
46 | </blockquote>
47 | <p>The next time you pick up a project, don’t just <strong>blindly throw AngularJS, Bootstrap and jQuery at it</strong>, and call it a day. Figure out ways to do shared rendering, use React or Taunus, or something else that allows you to do shared rendering without repeating yourself. Otherwise <strong>don’t do client-side rendering at all</strong>.</p>
48 | <p><strong>Strive for simplicity. Use progressive enhancement.</strong> Don’t do it for people who disable JavaScript. Don’t do it for people who use older browsers. Don’t even do it <em>just to be thorough</em>. Do it because you acknowledge the important of delivering content first. Do it because you acknowledge that <strong>your site doesn’t have to look the same in every device and browser <em>ever</em></strong>. Do it because it improves user experience. Do it because people on mobile networks shouldn’t have to suffer the painful experience of a broken web.</p>
49 | <p>Build up from the pillars of the web, instead of doing everything backwards and demanding your fancy web 2.0 JavaScript frameworks to be loaded, parsed, and executed before you can even begin to consider rendering human-digestible content.</p>
50 | <p>Here’s a checklist you might need.</p>
51 | <ul>
52 | <li>HTML first, get meaningful markup to the human being as soon as possible</li>
53 | <li>Deliver some CSS, <a href="/articles/critical-path-performance-optimization" title="Critical Path Performance Optimization at Pony Foo">inline critical path CSS</a> <em>(hey, that one came from Google, too!)</em></li>
54 | <li>Defer the rest of the CSS until <code class="md-code md-code-inline">onload</code> through JavaScript, but provide a fallback using <code class="md-code md-code-inline">&lt;noscript&gt;</code></li>
55 | <li>Defer below the fold images</li>
56 | <li>Defer font loading</li>
57 | <li>Defer all the JavaScript</li>
58 | <li><strong>Never again rely on client-side rendering alone</strong></li>
59 | <li>Prioritize content delivery</li>
60 | <li>Cache static assets</li>
61 | <li>Experiment with caching dynamic assets</li>
62 | <li>Cache database queries</li>
63 | <li><strong>Cache all the things</strong></li>
64 | </ul>
65 | <p>Also, use <code class="md-code md-code-inline">&lt;form&gt;</code> elements first, then build some AJAX on top of that. No! It’s not for the no-JavaScript crazies. If the JavaScript is still loading, your site will be useless unless you have <code class="md-code md-code-inline">&lt;form&gt;</code> elements in place to guarantee the functionality will be available. Some people just have to deal with slow mobile connections, embrace that. You can <a href="http://www.elijahmanor.com/enhanced-chrome-emulation-tools/" title="Enhanced Google Chrome Emulation Tools">use Google Chrome to emulate mobile connections</a>, for example.</p>
66 | <p>Don’t lock yourself into a comprehensive technology that may just die within the next few months and leave you stranded. With <a href="http://alistapart.com/article/understandingprogressiveenhancement" title="Understanding Progressive Enhancement">progressive enhancement</a> you’ll never go wrong. Progressive enhancement means your code will always work, because you’ll always focus on providing a minimal experience first, and then adding features, functionality, and behavior on top of the content.</p>
67 | <p>Do use a framework, but look into frameworks that are <strong>progressive-enhancement-friendly</strong>, such as <a href="https://github.com/bevacqua/taunus" title="bevacqua/taunus on GitHub">Taunus</a>, <a href="http://substack.net/shared_rendering_in_node_and_the_browser" title="Shared rendering in node and the browser">hyperspace</a>, <a href="https://github.com/facebook/react" title="facebook/react on GitHub">React</a>, or Backbone with <a href="https://github.com/rendrjs/rendr" title="rendrjs/rendr on GitHub">Rendr</a>. All of these somehow allow you to do shared rendering, although the <a href="https://github.com/rendrjs/rendr" title="rendrjs/rendr on GitHub">Rendr</a> solution is kind of awkward, <a href="https://github.com/buildfirst/buildfirst/tree/master/ch07/11_entourage" title="Entourage: Shared Rendering with Rendr">it does work</a>. Both Taunus and <code class="md-code md-code-inline">hyperspace</code> let you do things <em>“the modular way”</em> as they are surrounded by small modules you can take advantage of. React has its own kind of awful, but at least you can use if for server-side rendering, and at least Facebook <em>does</em> use it.</p>
68 | <p>Do look into ways of developing more modular architectures. Progressive enhancement doesn’t mean you’ll get a monolithic application as a result. Quite the contrary really. Progressive means that you’ll get an application that builds upon the principles of the web. It means that your application will work even when JavaScript is disabled, for the most part. It may even be missing a few core aspects of its functionality, say if you forget to add a <code class="md-code md-code-inline">&lt;form&gt;</code> fallback in an important part of your site’s experience.</p>
69 | <p>Even that would be okay, because you’d have learned the value of progressive enhancement, and you could add that <code class="md-code md-code-inline">&lt;form&gt;</code>, having your site be a little more lenient with older browsers and humans using mobile phones. You’d have learned not to render your application on the client-side alone, and you’d use shared-rendering or even server-side rendering instead. You’d have learned the value of the little things, like using <code class="md-code md-code-inline">&lt;noscript&gt;</code> tags or <a href="/articles/implementing-opensearch" title="Implementing OpenSearch">setting up OpenSearch</a>. You’d have learned to respect the web. You’d have gotten back on the road of those who truly care about the web.</p>
70 | <h3 id="you-d-have-learned-to-stop-breaking-the-web">You’d have learned to stop breaking the web.</h3>
71 | 


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void(o[r]=e.pos);e.pos++,o[r]=e.pos},n.prototype.tokenize=function(e){for(var t,r,n=this.ruler.getRules(""),s=n.length,i=e.posMax,o=e.md.options.maxNesting;e.pos<i;){if(e.level<o)for(r=0;s>r&&!(t=n[r](e,!1));r++);if(t){if(e.pos>=i)break}else e.pending+=e.src[e.pos++]}e.pending&&e.pushPending()},n.prototype.parse=function(e,t,r,n){var s,i,o,a=new this.State(e,t,r,n);for(this.tokenize(a),i=this.ruler2.getRules(""),o=i.length,s=0;o>s;s++)i[s](a)},n.prototype.State=e("./rules_inline/state_inline"),t.exports=n},{"./ruler":43,"./rules_inline/autolink":63,"./rules_inline/backticks":64,"./rules_inline/balance_pairs":65,"./rules_inline/emphasis":66,"./rules_inline/entity":67,"./rules_inline/escape":68,"./rules_inline/html_inline":69,"./rules_inline/image":70,"./rules_inline/link":71,"./rules_inline/newline":72,"./rules_inline/state_inline":73,"./rules_inline/strikethrough":74,"./rules_inline/text":75,"./rules_inline/text_collapse":76}],39:[function(e,t,r){"use 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strict";t.exports={options:{html:!1,xhtmlOut:!1,breaks:!1,langPrefix:"language-",linkify:!1,typographer:!1,quotes:"“”‘’",highlight:null,maxNesting:20},components:{core:{rules:["normalize","block","inline"]},block:{rules:["paragraph"]},inline:{rules:["text"],rules2:["balance_pairs","text_collapse"]}}}},{}],42:[function(e,t,r){"use strict";function n(){this.rules=s({},a)}var s=e("./common/utils").assign,i=e("./common/utils").unescapeAll,o=e("./common/utils").escapeHtml,a={};a.code_inline=function(e,t){return"<code>"+o(e[t].content)+"</code>"},a.code_block=function(e,t){return"<pre><code>"+o(e[t].content)+"</code></pre>\n"},a.fence=function(e,t,r,n,s){var a,l=e[t],c=l.info?i(l.info).trim():"",u="";return c&&(u=c.split(/\s+/g)[0],l.attrJoin("class",r.langPrefix+u)),a=r.highlight?r.highlight(l.content,u)||o(l.content):o(l.content),0===a.indexOf("<pre")?a+"\n":"<pre><code"+s.renderAttrs(l)+">"+a+"</code></pre>\n"},a.image=function(e,t,r,n,s){var i=e[t];return i.attrs[i.attrIndex("alt")][1]=s.renderInlineAsText(i.children,r,n),s.renderToken(e,t,r)},a.hardbreak=function(e,t,r){return r.xhtmlOut?"<br />\n":"<br>\n"},a.softbreak=function(e,t,r){return r.breaks?r.xhtmlOut?"<br />\n":"<br>\n":"\n"},a.text=function(e,t){return o(e[t].content)},a.html_block=function(e,t){return e[t].content},a.html_inline=function(e,t){return e[t].content},n.prototype.renderAttrs=function(e){var t,r,n;if(!e.attrs)return"";for(n="",t=0,r=e.attrs.length;r>t;t++)n+=" "+o(e.attrs[t][0])+'="'+o(e.attrs[t][1])+'"';return n},n.prototype.renderToken=function(e,t,r){var n,s="",i=!1,o=e[t];return o.hidden?"":(o.block&&-1!==o.nesting&&t&&e[t-1].hidden&&(s+="\n"),s+=(-1===o.nesting?"</":"<")+o.tag,s+=this.renderAttrs(o),0===o.nesting&&r.xhtmlOut&&(s+=" /"),o.block&&(i=!0,1===o.nesting&&t+1<e.length&&(n=e[t+1],"inline"===n.type||n.hidden?i=!1:-1===n.nesting&&n.tag===o.tag&&(i=!1))),s+=i?">\n":">")},n.prototype.renderInline=function(e,t,r){for(var n,s="",i=this.rules,o=0,a=e.length;a>o;o++)n=e[o].type,s+="undefined"!=typeof i[n]?i[n](e,o,t,r,this):this.renderToken(e,o,t);return s},n.prototype.renderInlineAsText=function(e,t,r){for(var n="",s=this.rules,i=0,o=e.length;o>i;i++)"text"===e[i].type?n+=s.text(e,i,t,r,this):"image"===e[i].type&&(n+=this.renderInlineAsText(e[i].children,t,r));return n},n.prototype.render=function(e,t,r){var n,s,i,o="",a=this.rules;for(n=0,s=e.length;s>n;n++)i=e[n].type,o+="inline"===i?this.renderInline(e[n].children,t,r):"undefined"!=typeof a[i]?a[e[n].type](e,n,t,r,this):this.renderToken(e,n,t,r);return o},t.exports=n},{"./common/utils":30}],43:[function(e,t,r){"use strict";function n(){this.__rules__=[],this.__cache__=null}n.prototype.__find__=function(e){for(var t=0;t<this.__rules__.length;t++)if(this.__rules__[t].name===e)return t;return-1},n.prototype.__compile__=function(){var e=this,t=[""];e.__rules__.forEach(function(e){e.enabled&&e.alt.forEach(function(e){t.indexOf(e)<0&&t.push(e)})}),e.__cache__={},t.forEach(function(t){e.__cache__[t]=[],e.__rules__.forEach(function(r){r.enabled&&(t&&r.alt.indexOf(t)<0||e.__cache__[t].push(r.fn))})})},n.prototype.at=function(e,t,r){var n=this.__find__(e),s=r||{};if(-1===n)throw new Error("Parser rule not found: "+e);this.__rules__[n].fn=t,this.__rules__[n].alt=s.alt||[],this.__cache__=null},n.prototype.before=function(e,t,r,n){var s=this.__find__(e),i=n||{};if(-1===s)throw new Error("Parser rule not found: "+e);this.__rules__.splice(s,0,{name:t,enabled:!0,fn:r,alt:i.alt||[]}),this.__cache__=null},n.prototype.after=function(e,t,r,n){var s=this.__find__(e),i=n||{};if(-1===s)throw new Error("Parser rule not found: "+e);this.__rules__.splice(s+1,0,{name:t,enabled:!0,fn:r,alt:i.alt||[]}),this.__cache__=null},n.prototype.push=function(e,t,r){var n=r||{};this.__rules__.push({name:e,enabled:!0,fn:t,alt:n.alt||[]}),this.__cache__=null},n.prototype.enable=function(e,t){Array.isArray(e)||(e=[e]);var r=[];return e.forEach(function(e){var n=this.__find__(e);if(0>n){if(t)return;throw new Error("Rules manager: invalid rule name "+e)}this.__rules__[n].enabled=!0,r.push(e)},this),this.__cache__=null,r},n.prototype.enableOnly=function(e,t){Array.isArray(e)||(e=[e]),this.__rules__.forEach(function(e){e.enabled=!1}),this.enable(e,t)},n.prototype.disable=function(e,t){Array.isArray(e)||(e=[e]);var r=[];return e.forEach(function(e){var n=this.__find__(e);if(0>n){if(t)return;throw new Error("Rules manager: invalid rule name "+e)}this.__rules__[n].enabled=!1,r.push(e)},this),this.__cache__=null,r},n.prototype.getRules=function(e){return null===this.__cache__&&this.__compile__(),this.__cache__[e]||[]},t.exports=n},{}],44:[function(e,t,r){"use strict";var n=e("../common/utils").isSpace;t.exports=function(e,t,r,s){var i,o,a,l,c,u,p,h,f,d,g,m,_,b,k,v,x=e.bMarks[t]+e.tShift[t],y=e.eMarks[t];if(62!==e.src.charCodeAt(x++))return!1;if(s)return!0;for(32===e.src.charCodeAt(x)&&x++,u=e.blkIndent,e.blkIndent=0,f=d=e.sCount[t]+x-(e.bMarks[t]+e.tShift[t]),c=[e.bMarks[t]],e.bMarks[t]=x;y>x&&(g=e.src.charCodeAt(x),n(g));)9===g?d+=4-d%4:d++,x++;for(o=x>=y,l=[e.sCount[t]],e.sCount[t]=d-f,a=[e.tShift[t]],e.tShift[t]=x-e.bMarks[t],m=e.md.block.ruler.getRules("blockquote"),i=t+1;r>i&&!(e.sCount[i]<u)&&(x=e.bMarks[i]+e.tShift[i],y=e.eMarks[i],!(x>=y));i++)if(62!==e.src.charCodeAt(x++)){if(o)break;for(v=!1,b=0,k=m.length;k>b;b++)if(m[b](e,i,r,!0)){v=!0;break}if(v)break;c.push(e.bMarks[i]),a.push(e.tShift[i]),l.push(e.sCount[i]),e.sCount[i]=-1}else{for(32===e.src.charCodeAt(x)&&x++,f=d=e.sCount[i]+x-(e.bMarks[i]+e.tShift[i]),c.push(e.bMarks[i]),e.bMarks[i]=x;y>x&&(g=e.src.charCodeAt(x),n(g));)9===g?d+=4-d%4:d++,x++;o=x>=y,l.push(e.sCount[i]),e.sCount[i]=d-f,a.push(e.tShift[i]),e.tShift[i]=x-e.bMarks[i]}for(p=e.parentType,e.parentType="blockquote",_=e.push("blockquote_open","blockquote",1),_.markup=">",_.map=h=[t,0],e.md.block.tokenize(e,t,i),_=e.push("blockquote_close","blockquote",-1),_.markup=">",e.parentType=p,h[1]=e.line,b=0;b<a.length;b++)e.bMarks[b+t]=c[b],e.tShift[b+t]=a[b],e.sCount[b+t]=l[b];return e.blkIndent=u,!0}},{"../common/utils":30}],45:[function(e,t,r){"use strict";t.exports=function(e,t,r){var n,s,i;if(e.sCount[t]-e.blkIndent<4)return!1;for(s=n=t+1;r>n;)if(e.isEmpty(n))n++;else{if(!(e.sCount[n]-e.blkIndent>=4))break;n++,s=n}return e.line=n,i=e.push("code_block","code",0),i.content=e.getLines(t,s,4+e.blkIndent,!0),i.map=[t,e.line],!0}},{}],46:[function(e,t,r){"use strict";t.exports=function(e,t,r,n){var s,i,o,a,l,c,u,p=!1,h=e.bMarks[t]+e.tShift[t],f=e.eMarks[t];if(h+3>f)return!1;if(s=e.src.charCodeAt(h),126!==s&&96!==s)return!1;if(l=h,h=e.skipChars(h,s),i=h-l,3>i)return!1;if(u=e.src.slice(l,h),o=e.src.slice(h,f),o.indexOf("`")>=0)return!1;if(n)return!0;for(a=t;(a++,!(a>=r))&&(h=l=e.bMarks[a]+e.tShift[a],f=e.eMarks[a],!(f>h&&e.sCount[a]<e.blkIndent));)if(e.src.charCodeAt(h)===s&&!(e.sCount[a]-e.blkIndent>=4||(h=e.skipChars(h,s),i>h-l||(h=e.skipSpaces(h),f>h)))){p=!0;break}return i=e.sCount[t],e.line=a+(p?1:0),c=e.push("fence","code",0),c.info=o,c.content=e.getLines(t+1,a,i,!0),c.markup=u,c.map=[t,e.line],!0}},{}],47:[function(e,t,r){"use strict";var n=e("../common/utils").isSpace;t.exports=function(e,t,r,s){var i,o,a,l,c=e.bMarks[t]+e.tShift[t],u=e.eMarks[t];if(i=e.src.charCodeAt(c),35!==i||c>=u)return!1;for(o=1,i=e.src.charCodeAt(++c);35===i&&u>c&&6>=o;)o++,i=e.src.charCodeAt(++c);return o>6||u>c&&32!==i?!1:s?!0:(u=e.skipSpacesBack(u,c),a=e.skipCharsBack(u,35,c),a>c&&n(e.src.charCodeAt(a-1))&&(u=a),e.line=t+1,l=e.push("heading_open","h"+String(o),1),l.markup="########".slice(0,o),l.map=[t,e.line],l=e.push("inline","",0),l.content=e.src.slice(c,u).trim(),l.map=[t,e.line],l.children=[],l=e.push("heading_close","h"+String(o),-1),l.markup="########".slice(0,o),!0)}},{"../common/utils":30}],48:[function(e,t,r){"use strict";var n=e("../common/utils").isSpace;t.exports=function(e,t,r,s){var i,o,a,l,c=e.bMarks[t]+e.tShift[t],u=e.eMarks[t];if(i=e.src.charCodeAt(c++),42!==i&&45!==i&&95!==i)return!1;for(o=1;u>c;){if(a=e.src.charCodeAt(c++),a!==i&&!n(a))return!1;a===i&&o++}return 3>o?!1:s?!0:(e.line=t+1,l=e.push("hr","hr",0),l.map=[t,e.line],l.markup=Array(o+1).join(String.fromCharCode(i)),!0)}},{"../common/utils":30}],49:[function(e,t,r){"use strict";var n=e("../common/html_blocks"),s=e("../common/html_re").HTML_OPEN_CLOSE_TAG_RE,i=[[/^<(script|pre|style)(?=(\s|>|$))/i,/<\/(script|pre|style)>/i,!0],[/^<!--/,/-->/,!0],[/^<\?/,/\?>/,!0],[/^<![A-Z]/,/>/,!0],[/^<!\[CDATA\[/,/\]\]>/,!0],[new RegExp("^</?("+n.join("|")+")(?=(\\s|/?>|$))","i"),/^$/,!0],[new RegExp(s.source+"\\s*$"),/^$/,!1]];t.exports=function(e,t,r,n){var s,o,a,l,c=e.bMarks[t]+e.tShift[t],u=e.eMarks[t];if(!e.md.options.html)return!1;if(60!==e.src.charCodeAt(c))return!1;for(l=e.src.slice(c,u),s=0;s<i.length&&!i[s][0].test(l);s++);if(s===i.length)return!1;if(n)return i[s][2];if(o=t+1,!i[s][1].test(l))for(;r>o&&!(e.sCount[o]<e.blkIndent);o++)if(c=e.bMarks[o]+e.tShift[o],u=e.eMarks[o],l=e.src.slice(c,u),i[s][1].test(l)){0!==l.length&&o++;break}return e.line=o,a=e.push("html_block","",0),a.map=[t,o],a.content=e.getLines(t,o,e.blkIndent,!0),!0}},{"../common/html_blocks":27,"../common/html_re":28}],50:[function(e,t,r){"use strict";t.exports=function(e,t,r){var n,s,i,o,a,l=t+1;return l>=r?!1:e.sCount[l]<e.blkIndent?!1:e.sCount[l]-e.blkIndent>3?!1:(s=e.bMarks[l]+e.tShift[l],i=e.eMarks[l],s>=i?!1:(n=e.src.charCodeAt(s),45!==n&&61!==n?!1:(s=e.skipChars(s,n),s=e.skipSpaces(s),i>s?!1:(s=e.bMarks[t]+e.tShift[t],e.line=l+1,a=61===n?1:2,o=e.push("heading_open","h"+String(a),1),o.markup=String.fromCharCode(n),o.map=[t,e.line],o=e.push("inline","",0),o.content=e.src.slice(s,e.eMarks[t]).trim(),o.map=[t,e.line-1],o.children=[],o=e.push("heading_close","h"+String(a),-1),o.markup=String.fromCharCode(n),!0))))}},{}],51:[function(e,t,r){"use strict";function n(e,t){var r,n,s,i;return n=e.bMarks[t]+e.tShift[t],s=e.eMarks[t],r=e.src.charCodeAt(n++),42!==r&&45!==r&&43!==r?-1:s>n&&(i=e.src.charCodeAt(n),!o(i))?-1:n}function s(e,t){var r,n=e.bMarks[t]+e.tShift[t],s=n,i=e.eMarks[t];if(s+1>=i)return-1;if(r=e.src.charCodeAt(s++),48>r||r>57)return-1;for(;;){if(s>=i)return-1;r=e.src.charCodeAt(s++);{if(!(r>=48&&57>=r)){if(41===r||46===r)break;return-1}if(s-n>=10)return-1}}return i>s&&(r=e.src.charCodeAt(s),!o(r))?-1:s}function i(e,t){var r,n,s=e.level+2;for(r=t+2,n=e.tokens.length-2;n>r;r++)e.tokens[r].level===s&&"paragraph_open"===e.tokens[r].type&&(e.tokens[r+2].hidden=!0,e.tokens[r].hidden=!0,r+=2)}var o=e("../common/utils").isSpace;t.exports=function(e,t,r,a){var l,c,u,p,h,f,d,g,m,_,b,k,v,x,y,E,w,C,A,D,S,q,N,L,F,M,R,T,z=!0;if((b=s(e,t))>=0)C=!0;else{if(!((b=n(e,t))>=0))return!1;C=!1}if(w=e.src.charCodeAt(b-1),a)return!0;for(D=e.tokens.length,C?(_=e.bMarks[t]+e.tShift[t],E=Number(e.src.substr(_,b-_-1)),F=e.push("ordered_list_open","ol",1),1!==E&&(F.attrs=[["start",E]])):F=e.push("bullet_list_open","ul",1),F.map=q=[t,0],F.markup=String.fromCharCode(w),l=t,S=!1,L=e.md.block.ruler.getRules("list");r>l;){for(v=b,x=e.eMarks[l],c=u=e.sCount[l]+b-(e.bMarks[t]+e.tShift[t]);x>v&&(k=e.src.charCodeAt(v),o(k));)9===k?u+=4-u%4:u++,v++;if(A=v,y=A>=x?1:u-c,y>4&&(y=1),p=c+y,F=e.push("list_item_open","li",1),F.markup=String.fromCharCode(w),F.map=N=[t,0],f=e.blkIndent,g=e.tight,h=e.tShift[t],d=e.sCount[t],m=e.parentType,e.blkIndent=p,e.tight=!0,e.parentType="list",e.tShift[t]=A-e.bMarks[t],e.sCount[t]=u,e.md.block.tokenize(e,t,r,!0),(!e.tight||S)&&(z=!1),S=e.line-t>1&&e.isEmpty(e.line-1),e.blkIndent=f,e.tShift[t]=h,e.sCount[t]=d,e.tight=g,e.parentType=m,F=e.push("list_item_close","li",-1),F.markup=String.fromCharCode(w),l=t=e.line,N[1]=l,A=e.bMarks[t],l>=r)break;if(e.isEmpty(l))break;if(e.sCount[l]<e.blkIndent)break;for(T=!1,M=0,R=L.length;R>M;M++)if(L[M](e,l,r,!0)){T=!0;break}if(T)break;if(C){if(b=s(e,l),0>b)break}else if(b=n(e,l),0>b)break;if(w!==e.src.charCodeAt(b-1))break}return F=C?e.push("ordered_list_close","ol",-1):e.push("bullet_list_close","ul",-1),F.markup=String.fromCharCode(w),q[1]=l,e.line=l,z&&i(e,D),!0}},{"../common/utils":30}],52:[function(e,t,r){"use strict";t.exports=function(e,t){for(var r,n,s,i,o,a=t+1,l=e.md.block.ruler.getRules("paragraph"),c=e.lineMax;c>a&&!e.isEmpty(a);a++)if(!(e.sCount[a]-e.blkIndent>3||e.sCount[a]<0)){for(n=!1,s=0,i=l.length;i>s;s++)if(l[s](e,a,c,!0)){n=!0;break}if(n)break}return r=e.getLines(t,a,e.blkIndent,!1).trim(),e.line=a,o=e.push("paragraph_open","p",1),o.map=[t,e.line],o=e.push("inline","",0),o.content=r,o.map=[t,e.line],o.children=[],o=e.push("paragraph_close","p",-1),!0}},{}],53:[function(e,t,r){"use strict";var n=e("../helpers/parse_link_destination"),s=e("../helpers/parse_link_title"),i=e("../common/utils").normalizeReference,o=e("../common/utils").isSpace;t.exports=function(e,t,r,a){var l,c,u,p,h,f,d,g,m,_,b,k,v,x,y,E=0,w=e.bMarks[t]+e.tShift[t],C=e.eMarks[t],A=t+1;if(91!==e.src.charCodeAt(w))return!1;for(;++w<C;)if(93===e.src.charCodeAt(w)&&92!==e.src.charCodeAt(w-1)){if(w+1===C)return!1;if(58!==e.src.charCodeAt(w+1))return!1;break}for(p=e.lineMax,x=e.md.block.ruler.getRules("reference");p>A&&!e.isEmpty(A);A++)if(!(e.sCount[A]-e.blkIndent>3||e.sCount[A]<0)){for(v=!1,f=0,d=x.length;d>f;f++)if(x[f](e,A,p,!0)){v=!0;break}if(v)break}for(k=e.getLines(t,A,e.blkIndent,!1).trim(),C=k.length,w=1;C>w;w++){if(l=k.charCodeAt(w),91===l)return!1;if(93===l){m=w;break}10===l?E++:92===l&&(w++,C>w&&10===k.charCodeAt(w)&&E++)}if(0>m||58!==k.charCodeAt(m+1))return!1;for(w=m+2;C>w;w++)if(l=k.charCodeAt(w),10===l)E++;else if(!o(l))break;if(_=n(k,w,C),!_.ok)return!1;if(h=e.md.normalizeLink(_.str),!e.md.validateLink(h))return!1;for(w=_.pos,E+=_.lines,c=w,u=E,b=w;C>w;w++)if(l=k.charCodeAt(w),10===l)E++;else if(!o(l))break;for(_=s(k,w,C),C>w&&b!==w&&_.ok?(y=_.str,w=_.pos,E+=_.lines):(y="",w=c,E=u);C>w&&(l=k.charCodeAt(w),o(l));)w++;if(C>w&&10!==k.charCodeAt(w)&&y)for(y="",w=c,E=u;C>w&&(l=k.charCodeAt(w),o(l));)w++;return C>w&&10!==k.charCodeAt(w)?!1:(g=i(k.slice(1,m)))?a?!0:("undefined"==typeof e.env.references&&(e.env.references={}),"undefined"==typeof e.env.references[g]&&(e.env.references[g]={title:y,href:h}),e.line=t+E+1,!0):!1}},{"../common/utils":30,"../helpers/parse_link_destination":32,"../helpers/parse_link_title":34}],54:[function(e,t,r){"use strict";function n(e,t,r,n){var s,o,a,l,c,u,p,h;for(this.src=e,this.md=t,this.env=r,this.tokens=n,this.bMarks=[],this.eMarks=[],this.tShift=[],this.sCount=[],this.blkIndent=0,this.line=0,this.lineMax=0,this.tight=!1,this.parentType="root",this.ddIndent=-1,this.level=0,this.result="",o=this.src,h=!1,a=l=u=p=0,c=o.length;c>l;l++){if(s=o.charCodeAt(l),!h){if(i(s)){u++,9===s?p+=4-p%4:p++;continue}h=!0}(10===s||l===c-1)&&(10!==s&&l++,this.bMarks.push(a),this.eMarks.push(l),this.tShift.push(u),this.sCount.push(p),h=!1,u=0,p=0,a=l+1)}this.bMarks.push(o.length),this.eMarks.push(o.length),this.tShift.push(0),this.sCount.push(0),this.lineMax=this.bMarks.length-1}var s=e("../token"),i=e("../common/utils").isSpace;n.prototype.push=function(e,t,r){var n=new s(e,t,r);return n.block=!0,0>r&&this.level--,n.level=this.level,r>0&&this.level++,this.tokens.push(n),n},n.prototype.isEmpty=function(e){return this.bMarks[e]+this.tShift[e]>=this.eMarks[e]},n.prototype.skipEmptyLines=function(e){for(var t=this.lineMax;t>e&&!(this.bMarks[e]+this.tShift[e]<this.eMarks[e]);e++);return e},n.prototype.skipSpaces=function(e){for(var t,r=this.src.length;r>e&&(t=this.src.charCodeAt(e),i(t));e++);return e},n.prototype.skipSpacesBack=function(e,t){if(t>=e)return e;for(;e>t;)if(!i(this.src.charCodeAt(--e)))return e+1;return e},n.prototype.skipChars=function(e,t){for(var r=this.src.length;r>e&&this.src.charCodeAt(e)===t;e++);return e},n.prototype.skipCharsBack=function(e,t,r){if(r>=e)return e;for(;e>r;)if(t!==this.src.charCodeAt(--e))return e+1;return e},n.prototype.getLines=function(e,t,r,n){var s,o,a,l,c,u,p,h=e;if(e>=t)return"";for(u=new Array(t-e),s=0;t>h;h++,s++){for(o=0,p=l=this.bMarks[h],c=t>h+1||n?this.eMarks[h]+1:this.eMarks[h];c>l&&r>o;){if(a=this.src.charCodeAt(l),i(a))9===a?o+=4-o%4:o++;else{if(!(l-p<this.tShift[h]))break;o++}l++}u[s]=this.src.slice(l,c)}return u.join("")},n.prototype.Token=s,t.exports=n},{"../common/utils":30,"../token":77}],55:[function(e,t,r){"use strict";function n(e,t){var r=e.bMarks[t]+e.blkIndent,n=e.eMarks[t];return e.src.substr(r,n-r)}function s(e){var t,r=[],n=0,s=e.length,i=0,o=0,a=!1,l=0;for(t=e.charCodeAt(n);s>n;)96===t&&i%2===0?(a=!a,l=n):124!==t||i%2!==0||a?92===t?i++:i=0:(r.push(e.substring(o,n)),o=n+1),n++,n===s&&a&&(a=!1,n=l+1),t=e.charCodeAt(n);return r.push(e.substring(o)),r}t.exports=function(e,t,r,i){var o,a,l,c,u,p,h,f,d,g,m,_;if(t+2>r)return!1;if(u=t+1,e.sCount[u]<e.blkIndent)return!1;if(l=e.bMarks[u]+e.tShift[u],l>=e.eMarks[u])return!1;if(o=e.src.charCodeAt(l),124!==o&&45!==o&&58!==o)return!1;if(a=n(e,t+1),!/^[-:| ]+$/.test(a))return!1;for(p=a.split("|"),d=[],c=0;c<p.length;c++){if(g=p[c].trim(),!g){if(0===c||c===p.length-1)continue;return!1}if(!/^:?-+:?$/.test(g))return!1;58===g.charCodeAt(g.length-1)?d.push(58===g.charCodeAt(0)?"center":"right"):58===g.charCodeAt(0)?d.push("left"):d.push("")}if(a=n(e,t).trim(),-1===a.indexOf("|"))return!1;if(p=s(a.replace(/^\||\|$/g,"")),h=p.length,h>d.length)return!1;if(i)return!0;for(f=e.push("table_open","table",1),f.map=m=[t,0],f=e.push("thead_open","thead",1),f.map=[t,t+1],f=e.push("tr_open","tr",1),f.map=[t,t+1],c=0;c<p.length;c++)f=e.push("th_open","th",1),f.map=[t,t+1],d[c]&&(f.attrs=[["style","text-align:"+d[c]]]),f=e.push("inline","",0),f.content=p[c].trim(),f.map=[t,t+1],f.children=[],f=e.push("th_close","th",-1);for(f=e.push("tr_close","tr",-1),f=e.push("thead_close","thead",-1),f=e.push("tbody_open","tbody",1),f.map=_=[t+2,0],u=t+2;r>u&&!(e.sCount[u]<e.blkIndent)&&(a=n(e,u).trim(),-1!==a.indexOf("|"));u++){for(p=s(a.replace(/^\||\|$/g,"")),f=e.push("tr_open","tr",1),c=0;h>c;c++)f=e.push("td_open","td",1),d[c]&&(f.attrs=[["style","text-align:"+d[c]]]),f=e.push("inline","",0),
3 | f.content=p[c]?p[c].trim():"",f.children=[],f=e.push("td_close","td",-1);f=e.push("tr_close","tr",-1)}return f=e.push("tbody_close","tbody",-1),f=e.push("table_close","table",-1),m[1]=_[1]=u,e.line=u,!0}},{}],56:[function(e,t,r){"use strict";t.exports=function(e){var t;e.inlineMode?(t=new e.Token("inline","",0),t.content=e.src,t.map=[0,1],t.children=[],e.tokens.push(t)):e.md.block.parse(e.src,e.md,e.env,e.tokens)}},{}],57:[function(e,t,r){"use strict";t.exports=function(e){var t,r,n,s=e.tokens;for(r=0,n=s.length;n>r;r++)t=s[r],"inline"===t.type&&e.md.inline.parse(t.content,e.md,e.env,t.children)}},{}],58:[function(e,t,r){"use strict";function n(e){return/^<a[>\s]/i.test(e)}function s(e){return/^<\/a\s*>/i.test(e)}var i=e("../common/utils").arrayReplaceAt;t.exports=function(e){var t,r,o,a,l,c,u,p,h,f,d,g,m,_,b,k,v,x=e.tokens;if(e.md.options.linkify)for(r=0,o=x.length;o>r;r++)if("inline"===x[r].type&&e.md.linkify.pretest(x[r].content))for(a=x[r].children,m=0,t=a.length-1;t>=0;t--)if(c=a[t],"link_close"!==c.type){if("html_inline"===c.type&&(n(c.content)&&m>0&&m--,s(c.content)&&m++),!(m>0)&&"text"===c.type&&e.md.linkify.test(c.content)){for(h=c.content,v=e.md.linkify.match(h),u=[],g=c.level,d=0,p=0;p<v.length;p++)_=v[p].url,b=e.md.normalizeLink(_),e.md.validateLink(b)&&(k=v[p].text,k=v[p].schema?"mailto:"!==v[p].schema||/^mailto:/i.test(k)?e.md.normalizeLinkText(k):e.md.normalizeLinkText("mailto:"+k).replace(/^mailto:/,""):e.md.normalizeLinkText("http://"+k).replace(/^http:\/\//,""),f=v[p].index,f>d&&(l=new e.Token("text","",0),l.content=h.slice(d,f),l.level=g,u.push(l)),l=new e.Token("link_open","a",1),l.attrs=[["href",b]],l.level=g++,l.markup="linkify",l.info="auto",u.push(l),l=new e.Token("text","",0),l.content=k,l.level=g,u.push(l),l=new e.Token("link_close","a",-1),l.level=--g,l.markup="linkify",l.info="auto",u.push(l),d=v[p].lastIndex);d<h.length&&(l=new e.Token("text","",0),l.content=h.slice(d),l.level=g,u.push(l)),x[r].children=a=i(a,t,u)}}else for(t--;a[t].level!==c.level&&"link_open"!==a[t].type;)t--}},{"../common/utils":30}],59:[function(e,t,r){"use strict";var n=/\r[\n\u0085]|[\u2424\u2028\u0085]/g,s=/\u0000/g;t.exports=function(e){var t;t=e.src.replace(n,"\n"),t=t.replace(s,"�"),e.src=t}},{}],60:[function(e,t,r){"use strict";function n(e,t){return c[t.toLowerCase()]}function s(e){var t,r;for(t=e.length-1;t>=0;t--)r=e[t],"text"===r.type&&(r.content=r.content.replace(l,n))}function i(e){var t,r;for(t=e.length-1;t>=0;t--)r=e[t],"text"===r.type&&o.test(r.content)&&(r.content=r.content.replace(/\+-/g,"±").replace(/\.{2,}/g,"…").replace(/([?!])…/g,"$1..").replace(/([?!]){4,}/g,"$1$1$1").replace(/,{2,}/g,",").replace(/(^|[^-])---([^-]|$)/gm,"$1—$2").replace(/(^|\s)--(\s|$)/gm,"$1–$2").replace(/(^|[^-\s])--([^-\s]|$)/gm,"$1–$2"))}var o=/\+-|\.\.|\?\?\?\?|!!!!|,,|--/,a=/\((c|tm|r|p)\)/i,l=/\((c|tm|r|p)\)/gi,c={c:"©",r:"®",p:"§",tm:"™"};t.exports=function(e){var t;if(e.md.options.typographer)for(t=e.tokens.length-1;t>=0;t--)"inline"===e.tokens[t].type&&(a.test(e.tokens[t].content)&&s(e.tokens[t].children),o.test(e.tokens[t].content)&&i(e.tokens[t].children))}},{}],61:[function(e,t,r){"use strict";function n(e,t,r){return e.substr(0,t)+r+e.substr(t+1)}function s(e,t){var r,s,l,p,h,f,d,g,m,_,b,k,v,x,y,E,w,C,A,D,S;for(A=[],r=0;r<e.length;r++){for(s=e[r],d=e[r].level,w=A.length-1;w>=0&&!(A[w].level<=d);w--);if(A.length=w+1,"text"===s.type){l=s.content,h=0,f=l.length;e:for(;f>h&&(c.lastIndex=h,p=c.exec(l));){if(y=E=!0,h=p.index+1,C="'"===p[0],m=32,p.index-1>=0)m=l.charCodeAt(p.index-1);else for(w=r-1;w>=0;w--)if("text"===e[w].type){m=e[w].content.charCodeAt(e[w].content.length-1);break}if(_=32,f>h)_=l.charCodeAt(h);else for(w=r+1;w<e.length;w++)if("text"===e[w].type){_=e[w].content.charCodeAt(0);break}if(b=a(m)||o(String.fromCharCode(m)),k=a(_)||o(String.fromCharCode(_)),v=i(m),x=i(_),x?y=!1:k&&(v||b||(y=!1)),v?E=!1:b&&(x||k||(E=!1)),34===_&&'"'===p[0]&&m>=48&&57>=m&&(E=y=!1),y&&E&&(y=!1,E=k),y||E){if(E)for(w=A.length-1;w>=0&&(g=A[w],!(A[w].level<d));w--)if(g.single===C&&A[w].level===d){g=A[w],C?(D=t.md.options.quotes[2],S=t.md.options.quotes[3]):(D=t.md.options.quotes[0],S=t.md.options.quotes[1]),s.content=n(s.content,p.index,S),e[g.token].content=n(e[g.token].content,g.pos,D),h+=S.length-1,g.token===r&&(h+=D.length-1),l=s.content,f=l.length,A.length=w;continue e}y?A.push({token:r,pos:p.index,single:C,level:d}):E&&C&&(s.content=n(s.content,p.index,u))}else C&&(s.content=n(s.content,p.index,u))}}}}var i=e("../common/utils").isWhiteSpace,o=e("../common/utils").isPunctChar,a=e("../common/utils").isMdAsciiPunct,l=/['"]/,c=/['"]/g,u="’";t.exports=function(e){var t;if(e.md.options.typographer)for(t=e.tokens.length-1;t>=0;t--)"inline"===e.tokens[t].type&&l.test(e.tokens[t].content)&&s(e.tokens[t].children,e)}},{"../common/utils":30}],62:[function(e,t,r){"use strict";function n(e,t,r){this.src=e,this.env=r,this.tokens=[],this.inlineMode=!1,this.md=t}var s=e("../token");n.prototype.Token=s,t.exports=n},{"../token":77}],63:[function(e,t,r){"use strict";var n=e("../common/url_schemas"),s=/^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/,i=/^<([a-zA-Z.\-]{1,25}):([^<>\x00-\x20]*)>/;t.exports=function(e,t){var r,o,a,l,c,u,p=e.pos;return 60!==e.src.charCodeAt(p)?!1:(r=e.src.slice(p),r.indexOf(">")<0?!1:i.test(r)?(o=r.match(i),n.indexOf(o[1].toLowerCase())<0?!1:(l=o[0].slice(1,-1),c=e.md.normalizeLink(l),e.md.validateLink(c)?(t||(u=e.push("link_open","a",1),u.attrs=[["href",c]],u.markup="autolink",u.info="auto",u=e.push("text","",0),u.content=e.md.normalizeLinkText(l),u=e.push("link_close","a",-1),u.markup="autolink",u.info="auto"),e.pos+=o[0].length,!0):!1)):s.test(r)?(a=r.match(s),l=a[0].slice(1,-1),c=e.md.normalizeLink("mailto:"+l),e.md.validateLink(c)?(t||(u=e.push("link_open","a",1),u.attrs=[["href",c]],u.markup="autolink",u.info="auto",u=e.push("text","",0),u.content=e.md.normalizeLinkText(l),u=e.push("link_close","a",-1),u.markup="autolink",u.info="auto"),e.pos+=a[0].length,!0):!1):!1)}},{"../common/url_schemas":29}],64:[function(e,t,r){"use strict";t.exports=function(e,t){var r,n,s,i,o,a,l=e.pos,c=e.src.charCodeAt(l);if(96!==c)return!1;for(r=l,l++,n=e.posMax;n>l&&96===e.src.charCodeAt(l);)l++;for(s=e.src.slice(r,l),i=o=l;-1!==(i=e.src.indexOf("`",o));){for(o=i+1;n>o&&96===e.src.charCodeAt(o);)o++;if(o-i===s.length)return t||(a=e.push("code_inline","code",0),a.markup=s,a.content=e.src.slice(l,i).replace(/[ \n]+/g," ").trim()),e.pos=o,!0}return t||(e.pending+=s),e.pos+=s.length,!0}},{}],65:[function(e,t,r){"use strict";t.exports=function(e){var t,r,n,s,i=e.delimiters,o=e.delimiters.length;for(t=0;o>t;t++)if(n=i[t],n.close)for(r=t-n.jump-1;r>=0;){if(s=i[r],s.open&&s.marker===n.marker&&s.end<0&&s.level===n.level){n.jump=t-r,n.open=!1,s.end=t,s.jump=0;break}r-=s.jump+1}}},{}],66:[function(e,t,r){"use strict";t.exports.tokenize=function(e,t){var r,n,s,i=e.pos,o=e.src.charCodeAt(i);if(t)return!1;if(95!==o&&42!==o)return!1;for(n=e.scanDelims(e.pos,42===o),r=0;r<n.length;r++)s=e.push("text","",0),s.content=String.fromCharCode(o),e.delimiters.push({marker:o,jump:r,token:e.tokens.length-1,level:e.level,end:-1,open:n.can_open,close:n.can_close});return e.pos+=n.length,!0},t.exports.postProcess=function(e){var t,r,n,s,i,o,a=e.delimiters,l=e.delimiters.length;for(t=0;l>t;t++)r=a[t],(95===r.marker||42===r.marker)&&-1!==r.end&&(n=a[r.end],o=l>t+1&&a[t+1].end===r.end-1&&a[t+1].token===r.token+1&&a[r.end-1].token===n.token-1&&a[t+1].marker===r.marker,i=String.fromCharCode(r.marker),s=e.tokens[r.token],s.type=o?"strong_open":"em_open",s.tag=o?"strong":"em",s.nesting=1,s.markup=o?i+i:i,s.content="",s=e.tokens[n.token],s.type=o?"strong_close":"em_close",s.tag=o?"strong":"em",s.nesting=-1,s.markup=o?i+i:i,s.content="",o&&(e.tokens[a[t+1].token].content="",e.tokens[a[r.end-1].token].content="",t++))}},{}],67:[function(e,t,r){"use strict";var n=e("../common/entities"),s=e("../common/utils").has,i=e("../common/utils").isValidEntityCode,o=e("../common/utils").fromCodePoint,a=/^&#((?:x[a-f0-9]{1,8}|[0-9]{1,8}));/i,l=/^&([a-z][a-z0-9]{1,31});/i;t.exports=function(e,t){var r,c,u,p=e.pos,h=e.posMax;if(38!==e.src.charCodeAt(p))return!1;if(h>p+1)if(r=e.src.charCodeAt(p+1),35===r){if(u=e.src.slice(p).match(a))return t||(c="x"===u[1][0].toLowerCase()?parseInt(u[1].slice(1),16):parseInt(u[1],10),e.pending+=o(i(c)?c:65533)),e.pos+=u[0].length,!0}else if(u=e.src.slice(p).match(l),u&&s(n,u[1]))return t||(e.pending+=n[u[1]]),e.pos+=u[0].length,!0;return t||(e.pending+="&"),e.pos++,!0}},{"../common/entities":26,"../common/utils":30}],68:[function(e,t,r){"use strict";for(var n=e("../common/utils").isSpace,s=[],i=0;256>i;i++)s.push(0);"\\!\"#$%&'()*+,./:;<=>?@[]^_`{|}~-".split("").forEach(function(e){s[e.charCodeAt(0)]=1}),t.exports=function(e,t){var r,i=e.pos,o=e.posMax;if(92!==e.src.charCodeAt(i))return!1;if(i++,o>i){if(r=e.src.charCodeAt(i),256>r&&0!==s[r])return t||(e.pending+=e.src[i]),e.pos+=2,!0;if(10===r){for(t||e.push("hardbreak","br",0),i++;o>i&&(r=e.src.charCodeAt(i),n(r));)i++;return e.pos=i,!0}}return t||(e.pending+="\\"),e.pos++,!0}},{"../common/utils":30}],69:[function(e,t,r){"use strict";function n(e){var t=32|e;return t>=97&&122>=t}var s=e("../common/html_re").HTML_TAG_RE;t.exports=function(e,t){var r,i,o,a,l=e.pos;return e.md.options.html?(o=e.posMax,60!==e.src.charCodeAt(l)||l+2>=o?!1:(r=e.src.charCodeAt(l+1),(33===r||63===r||47===r||n(r))&&(i=e.src.slice(l).match(s))?(t||(a=e.push("html_inline","",0),a.content=e.src.slice(l,l+i[0].length)),e.pos+=i[0].length,!0):!1)):!1}},{"../common/html_re":28}],70:[function(e,t,r){"use strict";var n=e("../helpers/parse_link_label"),s=e("../helpers/parse_link_destination"),i=e("../helpers/parse_link_title"),o=e("../common/utils").normalizeReference,a=e("../common/utils").isSpace;t.exports=function(e,t){var r,l,c,u,p,h,f,d,g,m,_,b,k,v="",x=e.pos,y=e.posMax;if(33!==e.src.charCodeAt(e.pos))return!1;if(91!==e.src.charCodeAt(e.pos+1))return!1;if(h=e.pos+2,p=n(e,e.pos+1,!1),0>p)return!1;if(f=p+1,y>f&&40===e.src.charCodeAt(f)){for(f++;y>f&&(l=e.src.charCodeAt(f),a(l)||10===l);f++);if(f>=y)return!1;for(k=f,g=s(e.src,f,e.posMax),g.ok&&(v=e.md.normalizeLink(g.str),e.md.validateLink(v)?f=g.pos:v=""),k=f;y>f&&(l=e.src.charCodeAt(f),a(l)||10===l);f++);if(g=i(e.src,f,e.posMax),y>f&&k!==f&&g.ok)for(m=g.str,f=g.pos;y>f&&(l=e.src.charCodeAt(f),a(l)||10===l);f++);else m="";if(f>=y||41!==e.src.charCodeAt(f))return e.pos=x,!1;f++}else{if("undefined"==typeof e.env.references)return!1;for(;y>f&&(l=e.src.charCodeAt(f),a(l)||10===l);f++);if(y>f&&91===e.src.charCodeAt(f)?(k=f+1,f=n(e,f),f>=0?u=e.src.slice(k,f++):f=p+1):f=p+1,u||(u=e.src.slice(h,p)),d=e.env.references[o(u)],!d)return e.pos=x,!1;v=d.href,m=d.title}return t||(c=e.src.slice(h,p),e.md.inline.parse(c,e.md,e.env,b=[]),_=e.push("image","img",0),_.attrs=r=[["src",v],["alt",""]],_.children=b,_.content=c,m&&r.push(["title",m])),e.pos=f,e.posMax=y,!0}},{"../common/utils":30,"../helpers/parse_link_destination":32,"../helpers/parse_link_label":33,"../helpers/parse_link_title":34}],71:[function(e,t,r){"use strict";var n=e("../helpers/parse_link_label"),s=e("../helpers/parse_link_destination"),i=e("../helpers/parse_link_title"),o=e("../common/utils").normalizeReference,a=e("../common/utils").isSpace;t.exports=function(e,t){var r,l,c,u,p,h,f,d,g,m,_="",b=e.pos,k=e.posMax,v=e.pos;if(91!==e.src.charCodeAt(e.pos))return!1;if(p=e.pos+1,u=n(e,e.pos,!0),0>u)return!1;if(h=u+1,k>h&&40===e.src.charCodeAt(h)){for(h++;k>h&&(l=e.src.charCodeAt(h),a(l)||10===l);h++);if(h>=k)return!1;for(v=h,f=s(e.src,h,e.posMax),f.ok&&(_=e.md.normalizeLink(f.str),e.md.validateLink(_)?h=f.pos:_=""),v=h;k>h&&(l=e.src.charCodeAt(h),a(l)||10===l);h++);if(f=i(e.src,h,e.posMax),k>h&&v!==h&&f.ok)for(g=f.str,h=f.pos;k>h&&(l=e.src.charCodeAt(h),a(l)||10===l);h++);else g="";if(h>=k||41!==e.src.charCodeAt(h))return e.pos=b,!1;h++}else{if("undefined"==typeof e.env.references)return!1;for(;k>h&&(l=e.src.charCodeAt(h),a(l)||10===l);h++);if(k>h&&91===e.src.charCodeAt(h)?(v=h+1,h=n(e,h),h>=0?c=e.src.slice(v,h++):h=u+1):h=u+1,c||(c=e.src.slice(p,u)),d=e.env.references[o(c)],!d)return e.pos=b,!1;_=d.href,g=d.title}return t||(e.pos=p,e.posMax=u,m=e.push("link_open","a",1),m.attrs=r=[["href",_]],g&&r.push(["title",g]),e.md.inline.tokenize(e),m=e.push("link_close","a",-1)),e.pos=h,e.posMax=k,!0}},{"../common/utils":30,"../helpers/parse_link_destination":32,"../helpers/parse_link_label":33,"../helpers/parse_link_title":34}],72:[function(e,t,r){"use strict";t.exports=function(e,t){var r,n,s=e.pos;if(10!==e.src.charCodeAt(s))return!1;for(r=e.pending.length-1,n=e.posMax,t||(r>=0&&32===e.pending.charCodeAt(r)?r>=1&&32===e.pending.charCodeAt(r-1)?(e.pending=e.pending.replace(/ +$/,""),e.push("hardbreak","br",0)):(e.pending=e.pending.slice(0,-1),e.push("softbreak","br",0)):e.push("softbreak","br",0)),s++;n>s&&32===e.src.charCodeAt(s);)s++;return e.pos=s,!0}},{}],73:[function(e,t,r){"use strict";function n(e,t,r,n){this.src=e,this.env=r,this.md=t,this.tokens=n,this.pos=0,this.posMax=this.src.length,this.level=0,this.pending="",this.pendingLevel=0,this.cache={},this.delimiters=[]}var s=e("../token"),i=e("../common/utils").isWhiteSpace,o=e("../common/utils").isPunctChar,a=e("../common/utils").isMdAsciiPunct;n.prototype.pushPending=function(){var e=new s("text","",0);return e.content=this.pending,e.level=this.pendingLevel,this.tokens.push(e),this.pending="",e},n.prototype.push=function(e,t,r){this.pending&&this.pushPending();var n=new s(e,t,r);return 0>r&&this.level--,n.level=this.level,r>0&&this.level++,this.pendingLevel=this.level,this.tokens.push(n),n},n.prototype.scanDelims=function(e,t){var r,n,s,l,c,u,p,h,f,d=e,g=!0,m=!0,_=this.posMax,b=this.src.charCodeAt(e);for(r=e>0?this.src.charCodeAt(e-1):32;_>d&&this.src.charCodeAt(d)===b;)d++;return s=d-e,n=_>d?this.src.charCodeAt(d):32,p=a(r)||o(String.fromCharCode(r)),f=a(n)||o(String.fromCharCode(n)),u=i(r),h=i(n),h?g=!1:f&&(u||p||(g=!1)),u?m=!1:p&&(h||f||(m=!1)),t?(l=g,c=m):(l=g&&(!m||p),c=m&&(!g||f)),{can_open:l,can_close:c,length:s}},n.prototype.Token=s,t.exports=n},{"../common/utils":30,"../token":77}],74:[function(e,t,r){"use strict";t.exports.tokenize=function(e,t){var r,n,s,i,o,a=e.pos,l=e.src.charCodeAt(a);if(t)return!1;if(126!==l)return!1;if(n=e.scanDelims(e.pos,!0),i=n.length,o=String.fromCharCode(l),2>i)return!1;for(i%2&&(s=e.push("text","",0),s.content=o,i--),r=0;i>r;r+=2)s=e.push("text","",0),s.content=o+o,e.delimiters.push({marker:l,jump:r,token:e.tokens.length-1,level:e.level,end:-1,open:n.can_open,close:n.can_close});return e.pos+=n.length,!0},t.exports.postProcess=function(e){var t,r,n,s,i,o=[],a=e.delimiters,l=e.delimiters.length;for(t=0;l>t;t++)n=a[t],126===n.marker&&-1!==n.end&&(s=a[n.end],i=e.tokens[n.token],i.type="s_open",i.tag="s",i.nesting=1,i.markup="~~",i.content="",i=e.tokens[s.token],i.type="s_close",i.tag="s",i.nesting=-1,i.markup="~~",i.content="","text"===e.tokens[s.token-1].type&&"~"===e.tokens[s.token-1].content&&o.push(s.token-1));for(;o.length;){for(t=o.pop(),r=t+1;r<e.tokens.length&&"s_close"===e.tokens[r].type;)r++;r--,t!==r&&(i=e.tokens[r],e.tokens[r]=e.tokens[t],e.tokens[t]=i)}}},{}],75:[function(e,t,r){"use strict";function n(e){switch(e){case 10:case 33:case 35:case 36:case 37:case 38:case 42:case 43:case 45:case 58:case 60:case 61:case 62:case 64:case 91:case 92:case 93:case 94:case 95:case 96:case 123:case 125:case 126:return!0;default:return!1}}t.exports=function(e,t){for(var r=e.pos;r<e.posMax&&!n(e.src.charCodeAt(r));)r++;return r===e.pos?!1:(t||(e.pending+=e.src.slice(e.pos,r)),e.pos=r,!0)}},{}],76:[function(e,t,r){"use strict";t.exports=function(e){var t,r,n=0,s=e.tokens,i=e.tokens.length;for(t=r=0;i>t;t++)n+=s[t].nesting,s[t].level=n,"text"===s[t].type&&i>t+1&&"text"===s[t+1].type?s[t+1].content=s[t].content+s[t+1].content:(t!==r&&(s[r]=s[t]),r++);t!==r&&(s.length=r)}},{}],77:[function(e,t,r){"use strict";function n(e,t,r){this.type=e,this.tag=t,this.attrs=null,this.map=null,this.nesting=r,this.level=0,this.children=null,this.content="",this.markup="",this.info="",this.meta=null,this.block=!1,this.hidden=!1}n.prototype.attrIndex=function(e){var t,r,n;if(!this.attrs)return-1;for(t=this.attrs,r=0,n=t.length;n>r;r++)if(t[r][0]===e)return r;return-1},n.prototype.attrPush=function(e){this.attrs?this.attrs.push(e):this.attrs=[e]},n.prototype.attrSet=function(e,t){var r=this.attrIndex(e),n=[e,t];0>r?this.attrPush(n):this.attrs[r]=n},n.prototype.attrJoin=function(e,t){var r=this.attrIndex(e);0>r?this.attrPush([e,t]):this.attrs[r][1]=this.attrs[r][1]+" "+t},t.exports=n},{}],78:[function(e,t,r){t.exports={Aacute:"Á",aacute:"á",Abreve:"Ă",abreve:"ă",ac:"∾",acd:"∿",acE:"∾̳",Acirc:"Â",acirc:"â",acute:"´",Acy:"А",acy:"а",AElig:"Æ",aelig:"æ",af:"⁡",Afr:"𝔄",afr:"𝔞",Agrave:"À",agrave:"à",alefsym:"ℵ",aleph:"ℵ",Alpha:"Α",alpha:"α",Amacr:"Ā",amacr:"ā",amalg:"⨿",amp:"&",AMP:"&",andand:"⩕",And:"⩓",and:"∧",andd:"⩜",andslope:"⩘",andv:"⩚",ang:"∠",ange:"⦤",angle:"∠",angmsdaa:"⦨",angmsdab:"⦩",angmsdac:"⦪",angmsdad:"⦫",angmsdae:"⦬",angmsdaf:"⦭",angmsdag:"⦮",angmsdah:"⦯",angmsd:"∡",angrt:"∟",angrtvb:"⊾",angrtvbd:"⦝",angsph:"∢",angst:"Å",angzarr:"⍼",Aogon:"Ą",aogon:"ą",Aopf:"𝔸",aopf:"𝕒",apacir:"⩯",ap:"≈",apE:"⩰",ape:"≊",apid:"≋",apos:"'",ApplyFunction:"⁡",approx:"≈",approxeq:"≊",Aring:"Å",aring:"å",Ascr:"𝒜",ascr:"𝒶",Assign:"≔",ast:"*",asymp:"≈",asympeq:"≍",Atilde:"Ã",atilde:"ã",Auml:"Ä",auml:"ä",awconint:"∳",awint:"⨑",backcong:"≌",backepsilon:"϶",backprime:"‵",backsim:"∽",backsimeq:"⋍",Backslash:"∖",Barv:"⫧",barvee:"⊽",barwed:"⌅",Barwed:"⌆",barwedge:"⌅",bbrk:"⎵",bbrktbrk:"⎶",bcong:"≌",Bcy:"Б",bcy:"б",bdquo:"„",becaus:"∵",because:"∵",Because:"∵",bemptyv:"⦰",bepsi:"϶",bernou:"ℬ",Bernoullis:"ℬ",Beta:"Β",beta:"β",beth:"ℶ",between:"≬",Bfr:"𝔅",bfr:"𝔟",bigcap:"⋂",bigcirc:"◯",bigcup:"⋃",bigodot:"⨀",bigoplus:"⨁",bigotimes:"⨂",bigsqcup:"⨆",bigstar:"★",bigtriangledown:"▽",bigtriangleup:"△",biguplus:"⨄",bigvee:"⋁",bigwedge:"⋀",bkarow:"⤍",blacklozenge:"⧫",blacksquare:"▪",blacktriangle:"▴",blacktriangledown:"▾",blacktriangleleft:"◂",blacktriangleright:"▸",blank:"␣",blk12:"▒",blk14:"░",blk34:"▓",block:"█",bne:"=⃥",bnequiv:"≡⃥",bNot:"⫭",bnot:"⌐",Bopf:"𝔹",bopf:"𝕓",bot:"⊥",bottom:"⊥",bowtie:"⋈",boxbox:"⧉",boxdl:"┐",boxdL:"╕",boxDl:"╖",boxDL:"╗",boxdr:"┌",boxdR:"╒",boxDr:"╓",boxDR:"╔",boxh:"─",boxH:"═",boxhd:"┬",boxHd:"╤",boxhD:"╥",boxHD:"╦",boxhu:"┴",boxHu:"╧",boxhU:"╨",boxHU:"╩",boxminus:"⊟",boxplus:"⊞",boxtimes:"⊠",boxul:"┘",boxuL:"╛",boxUl:"╜",boxUL:"╝",boxur:"└",boxuR:"╘",boxUr:"╙",boxUR:"╚",boxv:"│",boxV:"║",boxvh:"┼",boxvH:"╪",boxVh:"╫",boxVH:"╬",boxvl:"┤",boxvL:"╡",boxVl:"╢",boxVL:"╣",boxvr:"├",boxvR:"╞",boxVr:"╟",boxVR:"╠",bprime:"‵",breve:"˘",Breve:"˘",brvbar:"¦",bscr:"𝒷",Bscr:"ℬ",bsemi:"⁏",bsim:"∽",bsime:"⋍",bsolb:"⧅",bsol:"\\",bsolhsub:"⟈",bull:"•",bullet:"•",bump:"≎",bumpE:"⪮",bumpe:"≏",Bumpeq:"≎",bumpeq:"≏",Cacute:"Ć",cacute:"ć",capand:"⩄",capbrcup:"⩉",capcap:"⩋",cap:"∩",Cap:"⋒",capcup:"⩇",capdot:"⩀",CapitalDifferentialD:"ⅅ",caps:"∩︀",caret:"⁁",caron:"ˇ",Cayleys:"ℭ",ccaps:"⩍",Ccaron:"Č",ccaron:"č",Ccedil:"Ç",ccedil:"ç",Ccirc:"Ĉ",ccirc:"ĉ",Cconint:"∰",ccups:"⩌",ccupssm:"⩐",Cdot:"Ċ",cdot:"ċ",cedil:"¸",Cedilla:"¸",cemptyv:"⦲",cent:"¢",centerdot:"·",CenterDot:"·",cfr:"𝔠",Cfr:"ℭ",CHcy:"Ч",chcy:"ч",check:"✓",checkmark:"✓",Chi:"Χ",chi:"χ",circ:"ˆ",circeq:"≗",circlearrowleft:"↺",circlearrowright:"↻",circledast:"⊛",circledcirc:"⊚",circleddash:"⊝",CircleDot:"⊙",circledR:"®",circledS:"Ⓢ",CircleMinus:"⊖",CirclePlus:"⊕",CircleTimes:"⊗",cir:"○",cirE:"⧃",cire:"≗",cirfnint:"⨐",cirmid:"⫯",cirscir:"⧂",ClockwiseContourIntegral:"∲",CloseCurlyDoubleQuote:"”",CloseCurlyQuote:"’",clubs:"♣",clubsuit:"♣",colon:":",Colon:"∷",Colone:"⩴",colone:"≔",coloneq:"≔",comma:",",commat:"@",comp:"∁",compfn:"∘",complement:"∁",complexes:"ℂ",cong:"≅",congdot:"⩭",Congruent:"≡",conint:"∮",Conint:"∯",ContourIntegral:"∮",copf:"𝕔",Copf:"ℂ",coprod:"∐",Coproduct:"∐",copy:"©",COPY:"©",copysr:"℗",CounterClockwiseContourIntegral:"∳",crarr:"↵",cross:"✗",Cross:"⨯",Cscr:"𝒞",cscr:"𝒸",csub:"⫏",csube:"⫑",csup:"⫐",csupe:"⫒",ctdot:"⋯",cudarrl:"⤸",cudarrr:"⤵",cuepr:"⋞",cuesc:"⋟",cularr:"↶",cularrp:"⤽",cupbrcap:"⩈",cupcap:"⩆",CupCap:"≍",cup:"∪",Cup:"⋓",cupcup:"⩊",cupdot:"⊍",cupor:"⩅",cups:"∪︀",curarr:"↷",curarrm:"⤼",curlyeqprec:"⋞",curlyeqsucc:"⋟",curlyvee:"⋎",curlywedge:"⋏",curren:"¤",curvearrowleft:"↶",curvearrowright:"↷",cuvee:"⋎",cuwed:"⋏",cwconint:"∲",cwint:"∱",cylcty:"⌭",dagger:"†",Dagger:"‡",daleth:"ℸ",darr:"↓",Darr:"↡",dArr:"⇓",dash:"‐",Dashv:"⫤",dashv:"⊣",dbkarow:"⤏",dblac:"˝",Dcaron:"Ď",dcaron:"ď",Dcy:"Д",dcy:"д",ddagger:"‡",ddarr:"⇊",DD:"ⅅ",dd:"ⅆ",DDotrahd:"⤑",ddotseq:"⩷",deg:"°",Del:"∇",Delta:"Δ",delta:"δ",demptyv:"⦱",dfisht:"⥿",Dfr:"𝔇",dfr:"𝔡",dHar:"⥥",dharl:"⇃",dharr:"⇂",DiacriticalAcute:"´",DiacriticalDot:"˙",DiacriticalDoubleAcute:"˝",DiacriticalGrave:"`",DiacriticalTilde:"˜",diam:"⋄",diamond:"⋄",Diamond:"⋄",diamondsuit:"♦",diams:"♦",die:"¨",DifferentialD:"ⅆ",digamma:"ϝ",disin:"⋲",div:"÷",divide:"÷",divideontimes:"⋇",divonx:"⋇",DJcy:"Ђ",djcy:"ђ",dlcorn:"⌞",dlcrop:"⌍",dollar:"$",Dopf:"𝔻",dopf:"𝕕",Dot:"¨",dot:"˙",DotDot:"⃜",doteq:"≐",doteqdot:"≑",DotEqual:"≐",dotminus:"∸",dotplus:"∔",dotsquare:"⊡",doublebarwedge:"⌆",DoubleContourIntegral:"∯",DoubleDot:"¨",DoubleDownArrow:"⇓",DoubleLeftArrow:"⇐",DoubleLeftRightArrow:"⇔",DoubleLeftTee:"⫤",DoubleLongLeftArrow:"⟸",DoubleLongLeftRightArrow:"⟺",DoubleLongRightArrow:"⟹",DoubleRightArrow:"⇒",DoubleRightTee:"⊨",DoubleUpArrow:"⇑",DoubleUpDownArrow:"⇕",DoubleVerticalBar:"∥",DownArrowBar:"⤓",downarrow:"↓",DownArrow:"↓",Downarrow:"⇓",DownArrowUpArrow:"⇵",DownBreve:"̑",downdownarrows:"⇊",downharpoonleft:"⇃",downharpoonright:"⇂",DownLeftRightVector:"⥐",DownLeftTeeVector:"⥞",DownLeftVectorBar:"⥖",DownLeftVector:"↽",DownRightTeeVector:"⥟",DownRightVectorBar:"⥗",DownRightVector:"⇁",DownTeeArrow:"↧",DownTee:"⊤",drbkarow:"⤐",drcorn:"⌟",drcrop:"⌌",Dscr:"𝒟",dscr:"𝒹",DScy:"Ѕ",dscy:"ѕ",dsol:"⧶",Dstrok:"Đ",dstrok:"đ",dtdot:"⋱",dtri:"▿",dtrif:"▾",duarr:"⇵",duhar:"⥯",dwangle:"⦦",DZcy:"Џ",dzcy:"џ",dzigrarr:"⟿",Eacute:"É",eacute:"é",easter:"⩮",Ecaron:"Ě",ecaron:"ě",Ecirc:"Ê",ecirc:"ê",ecir:"≖",ecolon:"≕",Ecy:"Э",ecy:"э",eDDot:"⩷",Edot:"Ė",edot:"ė",eDot:"≑",ee:"ⅇ",efDot:"≒",Efr:"𝔈",efr:"𝔢",eg:"⪚",Egrave:"È",egrave:"è",egs:"⪖",egsdot:"⪘",el:"⪙",Element:"∈",elinters:"⏧",ell:"ℓ",els:"⪕",elsdot:"⪗",Emacr:"Ē",emacr:"ē",empty:"∅",emptyset:"∅",EmptySmallSquare:"◻",emptyv:"∅",EmptyVerySmallSquare:"▫",emsp13:" ",emsp14:" ",emsp:" ",ENG:"Ŋ",eng:"ŋ",ensp:" ",Eogon:"Ę",eogon:"ę",Eopf:"𝔼",eopf:"𝕖",epar:"⋕",eparsl:"⧣",eplus:"⩱",epsi:"ε",Epsilon:"Ε",epsilon:"ε",epsiv:"ϵ",eqcirc:"≖",eqcolon:"≕",eqsim:"≂",eqslantgtr:"⪖",eqslantless:"⪕",Equal:"⩵",equals:"=",EqualTilde:"≂",equest:"≟",Equilibrium:"⇌",equiv:"≡",equivDD:"⩸",eqvparsl:"⧥",erarr:"⥱",erDot:"≓",escr:"ℯ",Escr:"ℰ",esdot:"≐",Esim:"⩳",esim:"≂",Eta:"Η",eta:"η",ETH:"Ð",eth:"ð",Euml:"Ë",euml:"ë",euro:"€",excl:"!",exist:"∃",Exists:"∃",expectation:"ℰ",exponentiale:"ⅇ",ExponentialE:"ⅇ",fallingdotseq:"≒",Fcy:"Ф",fcy:"ф",female:"♀",ffilig:"ffi",fflig:"ff",ffllig:"ffl",Ffr:"𝔉",ffr:"𝔣",filig:"fi",FilledSmallSquare:"◼",FilledVerySmallSquare:"▪",fjlig:"fj",flat:"♭",fllig:"fl",fltns:"▱",fnof:"ƒ",Fopf:"𝔽",fopf:"𝕗",forall:"∀",ForAll:"∀",fork:"⋔",forkv:"⫙",Fouriertrf:"ℱ",fpartint:"⨍",frac12:"½",frac13:"⅓",frac14:"¼",frac15:"⅕",frac16:"⅙",frac18:"⅛",frac23:"⅔",frac25:"⅖",frac34:"¾",frac35:"⅗",frac38:"⅜",frac45:"⅘",frac56:"⅚",frac58:"⅝",frac78:"⅞",frasl:"⁄",frown:"⌢",fscr:"𝒻",Fscr:"ℱ",gacute:"ǵ",Gamma:"Γ",gamma:"γ",Gammad:"Ϝ",gammad:"ϝ",gap:"⪆",Gbreve:"Ğ",gbreve:"ğ",Gcedil:"Ģ",Gcirc:"Ĝ",gcirc:"ĝ",Gcy:"Г",gcy:"г",Gdot:"Ġ",gdot:"ġ",ge:"≥",gE:"≧",gEl:"⪌",gel:"⋛",geq:"≥",geqq:"≧",geqslant:"⩾",gescc:"⪩",ges:"⩾",gesdot:"⪀",gesdoto:"⪂",gesdotol:"⪄",gesl:"⋛︀",gesles:"⪔",Gfr:"𝔊",gfr:"𝔤",gg:"≫",Gg:"⋙",ggg:"⋙",gimel:"ℷ",GJcy:"Ѓ",gjcy:"ѓ",gla:"⪥",gl:"≷",glE:"⪒",glj:"⪤",gnap:"⪊",gnapprox:"⪊",gne:"⪈",gnE:"≩",gneq:"⪈",gneqq:"≩",gnsim:"⋧",Gopf:"𝔾",gopf:"𝕘",grave:"`",GreaterEqual:"≥",GreaterEqualLess:"⋛",GreaterFullEqual:"≧",GreaterGreater:"⪢",GreaterLess:"≷",GreaterSlantEqual:"⩾",GreaterTilde:"≳",Gscr:"𝒢",gscr:"ℊ",gsim:"≳",gsime:"⪎",gsiml:"⪐",gtcc:"⪧",gtcir:"⩺",gt:">",GT:">",Gt:"≫",gtdot:"⋗",gtlPar:"⦕",gtquest:"⩼",gtrapprox:"⪆",gtrarr:"⥸",gtrdot:"⋗",gtreqless:"⋛",gtreqqless:"⪌",gtrless:"≷",gtrsim:"≳",gvertneqq:"≩︀",gvnE:"≩︀",Hacek:"ˇ",hairsp:" ",half:"½",hamilt:"ℋ",HARDcy:"Ъ",hardcy:"ъ",harrcir:"⥈",harr:"↔",hArr:"⇔",harrw:"↭",Hat:"^",hbar:"ℏ",Hcirc:"Ĥ",hcirc:"ĥ",hearts:"♥",heartsuit:"♥",hellip:"…",hercon:"⊹",hfr:"𝔥",Hfr:"ℌ",HilbertSpace:"ℋ",hksearow:"⤥",hkswarow:"⤦",hoarr:"⇿",homtht:"∻",hookleftarrow:"↩",hookrightarrow:"↪",hopf:"𝕙",Hopf:"ℍ",horbar:"―",HorizontalLine:"─",hscr:"𝒽",Hscr:"ℋ",hslash:"ℏ",Hstrok:"Ħ",hstrok:"ħ",HumpDownHump:"≎",HumpEqual:"≏",hybull:"⁃",hyphen:"‐",Iacute:"Í",iacute:"í",ic:"⁣",Icirc:"Î",icirc:"î",Icy:"И",icy:"и",Idot:"İ",IEcy:"Е",iecy:"е",iexcl:"¡",iff:"⇔",ifr:"𝔦",Ifr:"ℑ",Igrave:"Ì",igrave:"ì",ii:"ⅈ",iiiint:"⨌",iiint:"∭",iinfin:"⧜",iiota:"℩",IJlig:"IJ",ijlig:"ij",Imacr:"Ī",imacr:"ī",image:"ℑ",ImaginaryI:"ⅈ",imagline:"ℐ",imagpart:"ℑ",imath:"ı",Im:"ℑ",imof:"⊷",imped:"Ƶ",Implies:"⇒",incare:"℅","in":"∈",infin:"∞",infintie:"⧝",inodot:"ı",intcal:"⊺","int":"∫",Int:"∬",integers:"ℤ",Integral:"∫",intercal:"⊺",Intersection:"⋂",intlarhk:"⨗",intprod:"⨼",InvisibleComma:"⁣",InvisibleTimes:"⁢",IOcy:"Ё",iocy:"ё",Iogon:"Į",iogon:"į",Iopf:"𝕀",iopf:"𝕚",Iota:"Ι",iota:"ι",iprod:"⨼",iquest:"¿",iscr:"𝒾",Iscr:"ℐ",isin:"∈",isindot:"⋵",isinE:"⋹",isins:"⋴",isinsv:"⋳",isinv:"∈",it:"⁢",Itilde:"Ĩ",itilde:"ĩ",Iukcy:"І",iukcy:"і",Iuml:"Ï",iuml:"ï",Jcirc:"Ĵ",jcirc:"ĵ",Jcy:"Й",jcy:"й",Jfr:"𝔍",jfr:"𝔧",jmath:"ȷ",Jopf:"𝕁",jopf:"𝕛",Jscr:"𝒥",jscr:"𝒿",Jsercy:"Ј",jsercy:"ј",Jukcy:"Є",jukcy:"є",Kappa:"Κ",kappa:"κ",kappav:"ϰ",Kcedil:"Ķ",kcedil:"ķ",Kcy:"К",kcy:"к",Kfr:"𝔎",kfr:"𝔨",kgreen:"ĸ",KHcy:"Х",khcy:"х",KJcy:"Ќ",kjcy:"ќ",Kopf:"𝕂",kopf:"𝕜",Kscr:"𝒦",kscr:"𝓀",lAarr:"⇚",Lacute:"Ĺ",lacute:"ĺ",laemptyv:"⦴",lagran:"ℒ",Lambda:"Λ",lambda:"λ",lang:"⟨",Lang:"⟪",langd:"⦑",langle:"⟨",lap:"⪅",Laplacetrf:"ℒ",laquo:"«",larrb:"⇤",larrbfs:"⤟",larr:"←",Larr:"↞",lArr:"⇐",larrfs:"⤝",larrhk:"↩",larrlp:"↫",larrpl:"⤹",larrsim:"⥳",larrtl:"↢",latail:"⤙",lAtail:"⤛",lat:"⪫",late:"⪭",lates:"⪭︀",lbarr:"⤌",lBarr:"⤎",lbbrk:"❲",lbrace:"{",lbrack:"[",lbrke:"⦋",lbrksld:"⦏",lbrkslu:"⦍",Lcaron:"Ľ",lcaron:"ľ",Lcedil:"Ļ",lcedil:"ļ",lceil:"⌈",lcub:"{",Lcy:"Л",lcy:"л",ldca:"⤶",ldquo:"“",ldquor:"„",ldrdhar:"⥧",ldrushar:"⥋",ldsh:"↲",le:"≤",lE:"≦",LeftAngleBracket:"⟨",LeftArrowBar:"⇤",leftarrow:"←",LeftArrow:"←",Leftarrow:"⇐",LeftArrowRightArrow:"⇆",leftarrowtail:"↢",LeftCeiling:"⌈",LeftDoubleBracket:"⟦",LeftDownTeeVector:"⥡",LeftDownVectorBar:"⥙",LeftDownVector:"⇃",LeftFloor:"⌊",leftharpoondown:"↽",leftharpoonup:"↼",leftleftarrows:"⇇",leftrightarrow:"↔",LeftRightArrow:"↔",Leftrightarrow:"⇔",leftrightarrows:"⇆",leftrightharpoons:"⇋",leftrightsquigarrow:"↭",LeftRightVector:"⥎",LeftTeeArrow:"↤",LeftTee:"⊣",LeftTeeVector:"⥚",leftthreetimes:"⋋",LeftTriangleBar:"⧏",LeftTriangle:"⊲",LeftTriangleEqual:"⊴",LeftUpDownVector:"⥑",LeftUpTeeVector:"⥠",LeftUpVectorBar:"⥘",LeftUpVector:"↿",LeftVectorBar:"⥒",LeftVector:"↼",lEg:"⪋",leg:"⋚",leq:"≤",leqq:"≦",leqslant:"⩽",lescc:"⪨",les:"⩽",lesdot:"⩿",lesdoto:"⪁",lesdotor:"⪃",lesg:"⋚︀",lesges:"⪓",lessapprox:"⪅",lessdot:"⋖",lesseqgtr:"⋚",lesseqqgtr:"⪋",LessEqualGreater:"⋚",LessFullEqual:"≦",LessGreater:"≶",lessgtr:"≶",LessLess:"⪡",lesssim:"≲",LessSlantEqual:"⩽",LessTilde:"≲",lfisht:"⥼",lfloor:"⌊",Lfr:"𝔏",lfr:"𝔩",lg:"≶",lgE:"⪑",lHar:"⥢",lhard:"↽",lharu:"↼",lharul:"⥪",lhblk:"▄",LJcy:"Љ",ljcy:"љ",llarr:"⇇",ll:"≪",Ll:"⋘",llcorner:"⌞",Lleftarrow:"⇚",llhard:"⥫",lltri:"◺",Lmidot:"Ŀ",lmidot:"ŀ",lmoustache:"⎰",lmoust:"⎰",lnap:"⪉",lnapprox:"⪉",lne:"⪇",lnE:"≨",lneq:"⪇",lneqq:"≨",lnsim:"⋦",loang:"⟬",loarr:"⇽",lobrk:"⟦",longleftarrow:"⟵",LongLeftArrow:"⟵",Longleftarrow:"⟸",longleftrightarrow:"⟷",LongLeftRightArrow:"⟷",Longleftrightarrow:"⟺",longmapsto:"⟼",longrightarrow:"⟶",LongRightArrow:"⟶",Longrightarrow:"⟹",looparrowleft:"↫",looparrowright:"↬",lopar:"⦅",Lopf:"𝕃",lopf:"𝕝",loplus:"⨭",lotimes:"⨴",lowast:"∗",lowbar:"_",LowerLeftArrow:"↙",LowerRightArrow:"↘",loz:"◊",lozenge:"◊",lozf:"⧫",lpar:"(",lparlt:"⦓",lrarr:"⇆",lrcorner:"⌟",lrhar:"⇋",lrhard:"⥭",lrm:"‎",lrtri:"⊿",lsaquo:"‹",lscr:"𝓁",Lscr:"ℒ",lsh:"↰",Lsh:"↰",lsim:"≲",lsime:"⪍",lsimg:"⪏",lsqb:"[",lsquo:"‘",lsquor:"‚",Lstrok:"Ł",lstrok:"ł",ltcc:"⪦",ltcir:"⩹",lt:"<",LT:"<",Lt:"≪",ltdot:"⋖",lthree:"⋋",ltimes:"⋉",ltlarr:"⥶",ltquest:"⩻",ltri:"◃",ltrie:"⊴",ltrif:"◂",ltrPar:"⦖",lurdshar:"⥊",luruhar:"⥦",lvertneqq:"≨︀",lvnE:"≨︀",macr:"¯",male:"♂",malt:"✠",maltese:"✠",Map:"⤅",map:"↦",mapsto:"↦",mapstodown:"↧",mapstoleft:"↤",mapstoup:"↥",marker:"▮",mcomma:"⨩",Mcy:"М",mcy:"м",mdash:"—",mDDot:"∺",measuredangle:"∡",MediumSpace:" ",Mellintrf:"ℳ",Mfr:"𝔐",mfr:"𝔪",mho:"℧",micro:"µ",midast:"*",midcir:"⫰",mid:"∣",middot:"·",minusb:"⊟",minus:"−",minusd:"∸",minusdu:"⨪",MinusPlus:"∓",mlcp:"⫛",mldr:"…",mnplus:"∓",models:"⊧",Mopf:"𝕄",mopf:"𝕞",mp:"∓",mscr:"𝓂",Mscr:"ℳ",mstpos:"∾",Mu:"Μ",mu:"μ",multimap:"⊸",mumap:"⊸",nabla:"∇",Nacute:"Ń",nacute:"ń",nang:"∠⃒",nap:"≉",napE:"⩰̸",napid:"≋̸",napos:"ʼn",napprox:"≉",natural:"♮",naturals:"ℕ",natur:"♮",nbsp:" ",nbump:"≎̸",nbumpe:"≏̸",ncap:"⩃",Ncaron:"Ň",ncaron:"ň",Ncedil:"Ņ",ncedil:"ņ",ncong:"≇",ncongdot:"⩭̸",ncup:"⩂",Ncy:"Н",ncy:"н",ndash:"–",nearhk:"⤤",nearr:"↗",neArr:"⇗",nearrow:"↗",ne:"≠",nedot:"≐̸",NegativeMediumSpace:"​",NegativeThickSpace:"​",NegativeThinSpace:"​",NegativeVeryThinSpace:"​",nequiv:"≢",nesear:"⤨",nesim:"≂̸",NestedGreaterGreater:"≫",NestedLessLess:"≪",NewLine:"\n",nexist:"∄",nexists:"∄",Nfr:"𝔑",nfr:"𝔫",ngE:"≧̸",nge:"≱",ngeq:"≱",ngeqq:"≧̸",ngeqslant:"⩾̸",nges:"⩾̸",nGg:"⋙̸",ngsim:"≵",nGt:"≫⃒",ngt:"≯",ngtr:"≯",nGtv:"≫̸",nharr:"↮",nhArr:"⇎",nhpar:"⫲",ni:"∋",nis:"⋼",nisd:"⋺",niv:"∋",NJcy:"Њ",njcy:"њ",nlarr:"↚",nlArr:"⇍",nldr:"‥",nlE:"≦̸",nle:"≰",nleftarrow:"↚",nLeftarrow:"⇍",nleftrightarrow:"↮",nLeftrightarrow:"⇎",nleq:"≰",nleqq:"≦̸",nleqslant:"⩽̸",nles:"⩽̸",nless:"≮",nLl:"⋘̸",nlsim:"≴",nLt:"≪⃒",nlt:"≮",nltri:"⋪",nltrie:"⋬",nLtv:"≪̸",nmid:"∤",NoBreak:"⁠",NonBreakingSpace:" ",nopf:"𝕟",Nopf:"ℕ",Not:"⫬",not:"¬",NotCongruent:"≢",NotCupCap:"≭",NotDoubleVerticalBar:"∦",NotElement:"∉",NotEqual:"≠",NotEqualTilde:"≂̸",NotExists:"∄",NotGreater:"≯",NotGreaterEqual:"≱",NotGreaterFullEqual:"≧̸",NotGreaterGreater:"≫̸",NotGreaterLess:"≹",NotGreaterSlantEqual:"⩾̸",NotGreaterTilde:"≵",NotHumpDownHump:"≎̸",NotHumpEqual:"≏̸",notin:"∉",notindot:"⋵̸",notinE:"⋹̸",notinva:"∉",notinvb:"⋷",notinvc:"⋶",NotLeftTriangleBar:"⧏̸",NotLeftTriangle:"⋪",NotLeftTriangleEqual:"⋬",NotLess:"≮",NotLessEqual:"≰",NotLessGreater:"≸",NotLessLess:"≪̸",NotLessSlantEqual:"⩽̸",NotLessTilde:"≴",NotNestedGreaterGreater:"⪢̸",NotNestedLessLess:"⪡̸",notni:"∌",notniva:"∌",notnivb:"⋾",notnivc:"⋽",NotPrecedes:"⊀",NotPrecedesEqual:"⪯̸",NotPrecedesSlantEqual:"⋠",NotReverseElement:"∌",NotRightTriangleBar:"⧐̸",NotRightTriangle:"⋫",NotRightTriangleEqual:"⋭",NotSquareSubset:"⊏̸",NotSquareSubsetEqual:"⋢",NotSquareSuperset:"⊐̸",NotSquareSupersetEqual:"⋣",NotSubset:"⊂⃒",NotSubsetEqual:"⊈",NotSucceeds:"⊁",NotSucceedsEqual:"⪰̸",NotSucceedsSlantEqual:"⋡",NotSucceedsTilde:"≿̸",NotSuperset:"⊃⃒",NotSupersetEqual:"⊉",NotTilde:"≁",NotTildeEqual:"≄",NotTildeFullEqual:"≇",NotTildeTilde:"≉",NotVerticalBar:"∤",nparallel:"∦",npar:"∦",nparsl:"⫽⃥",npart:"∂̸",npolint:"⨔",npr:"⊀",nprcue:"⋠",nprec:"⊀",npreceq:"⪯̸",npre:"⪯̸",nrarrc:"⤳̸",nrarr:"↛",nrArr:"⇏",nrarrw:"↝̸",nrightarrow:"↛",nRightarrow:"⇏",nrtri:"⋫",nrtrie:"⋭",nsc:"⊁",nsccue:"⋡",nsce:"⪰̸",Nscr:"𝒩",nscr:"𝓃",nshortmid:"∤",nshortparallel:"∦",nsim:"≁",nsime:"≄",nsimeq:"≄",nsmid:"∤",nspar:"∦",nsqsube:"⋢",nsqsupe:"⋣",nsub:"⊄",nsubE:"⫅̸",nsube:"⊈",nsubset:"⊂⃒",nsubseteq:"⊈",nsubseteqq:"⫅̸",nsucc:"⊁",nsucceq:"⪰̸",nsup:"⊅",nsupE:"⫆̸",nsupe:"⊉",nsupset:"⊃⃒",nsupseteq:"⊉",nsupseteqq:"⫆̸",ntgl:"≹",Ntilde:"Ñ",ntilde:"ñ",ntlg:"≸",ntriangleleft:"⋪",ntrianglelefteq:"⋬",ntriangleright:"⋫",ntrianglerighteq:"⋭",Nu:"Ν",nu:"ν",num:"#",numero:"№",numsp:" ",nvap:"≍⃒",nvdash:"⊬",nvDash:"⊭",nVdash:"⊮",nVDash:"⊯",nvge:"≥⃒",nvgt:">⃒",nvHarr:"⤄",
4 | 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