Markdown Overhaul (#2624)
Rebuilt Markdown editor/views into new components
This commit is contained in:
Alec Merdler
GitHub
parent
945510dcf0
commit
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50 changed files with 819 additions and 3896 deletions
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A javascript port of Markdown, as used on Stack Overflow
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and the rest of Stack Exchange network.
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Largely based on showdown.js by John Fraser (Attacklab).
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Original Markdown Copyright (c) 2004-2005 John Gruber
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<http://daringfireball.net/projects/markdown/>
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Original Showdown code copyright (c) 2007 John Fraser
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Modifications and bugfixes (c) 2009 Dana Robinson
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Modifications and bugfixes (c) 2009-2011 Stack Exchange Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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.wmd-panel {
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width: 100%;
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}
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.wmd-input {
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height: 300px;
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width: 100%;
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box-sizing: border-box;
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-webkit-box-sizing:border-box;
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-moz-box-sizing: border-box;
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-ms-box-sizing: border-box;
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}
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.wmd-preview {
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.well;
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width: 100%;
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box-sizing: border-box;
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-webkit-box-sizing:border-box;
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-moz-box-sizing: border-box;
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-ms-box-sizing: border-box;
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}
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.wmd-panel .btn-toolbar {
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margin-bottom: 0;
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padding: 0;
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width: 100%;
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}
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.icon-link,
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.icon-blockquote,
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.icon-code,
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.icon-bullet-list,
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.icon-list,
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.icon-header,
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.icon-hr-line,
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.icon-undo {
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background-image: url(Markdown.Editor.Icons.png);
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}
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.icon-link { background-position: 0 0; }
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.icon-blockquote { background-position: -24px 0; }
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.icon-code { background-position: -48px 0; }
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.icon-bullet-list { background-position: -72px 0; }
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.icon-list { background-position: -96px 0; }
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.icon-header { background-position: -120px 0; }
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.icon-hr-line { background-position: -144px 0; }
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.icon-undo { background-position: -168px 0; }
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.wmd-prompt-background
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{
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background-color: Black;
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}
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.wmd-prompt-dialog
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{
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border: 1px solid #999999;
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background-color: #F5F5F5;
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}
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.wmd-prompt-dialog > div {
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font-size: 0.8em;
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font-family: arial, helvetica, sans-serif;
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}
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.wmd-prompt-dialog > form > input[type="text"] {
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border: 1px solid #999999;
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color: black;
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}
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.wmd-prompt-dialog > form > input[type="button"]{
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border: 1px solid #888888;
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font-family: trebuchet MS, helvetica, sans-serif;
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font-size: 0.8em;
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font-weight: bold;
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}
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(function () {
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var output, Converter;
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if (typeof exports === "object" && typeof require === "function") { // we're in a CommonJS (e.g. Node.js) module
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output = exports;
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Converter = require("./Markdown.Converter").Converter;
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} else {
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output = window.Markdown;
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Converter = output.Converter;
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}
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output.getSanitizingConverter = function () {
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var converter = new Converter();
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converter.hooks.chain("postConversion", sanitizeHtml);
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converter.hooks.chain("postConversion", balanceTags);
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return converter;
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}
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function sanitizeHtml(html) {
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return html.replace(/<[^>]*>?/gi, sanitizeTag);
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}
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// (tags that can be opened/closed) | (tags that stand alone)
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var basic_tag_whitelist = /^(<\/?(b|blockquote|code|del|dd|dl|dt|em|h1|h2|h3|i|kbd|li|ol|p|s|sup|sub|strong|strike|ul)>|<(br|hr)\s?\/?>)$/i;
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// <a href="url..." optional title>|</a>
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var a_white = /^(<a\shref="(https?:(\/\/|\/)|ftp:(\/\/|\/)|mailto:|magnet:)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\stitle="[^"<>]+")?\s?>|<\/a>)$/i;
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// <img src="url..." optional width optional height optional alt optional title
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var img_white = /^(<img\ssrc="(https?:\/\/|\/)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\swidth="\d{1,3}")?(\sheight="\d{1,3}")?(\salt="[^"<>]*")?(\stitle="[^"<>]*")?\s?\/?>)$/i;
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// <pre optional class="prettyprint linenums">|</pre> for twitter bootstrap
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var pre_white = /^(<pre(\sclass="prettyprint linenums")?>|<\/pre>)$/i;
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function sanitizeTag(tag) {
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if (tag.match(basic_tag_whitelist) || tag.match(a_white) || tag.match(img_white) || tag.match(pre_white))
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return tag;
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else
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return "";
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}
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/// <summary>
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/// attempt to balance HTML tags in the html string
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/// by removing any unmatched opening or closing tags
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/// IMPORTANT: we *assume* HTML has *already* been
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/// sanitized and is safe/sane before balancing!
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///
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/// adapted from CODESNIPPET: A8591DBA-D1D3-11DE-947C-BA5556D89593
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/// </summary>
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function balanceTags(html) {
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if (html == "")
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return "";
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var re = /<\/?\w+[^>]*(\s|$|>)/g;
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// convert everything to lower case; this makes
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// our case insensitive comparisons easier
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var tags = html.toLowerCase().match(re);
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// no HTML tags present? nothing to do; exit now
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var tagcount = (tags || []).length;
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if (tagcount == 0)
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return html;
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var tagname, tag;
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var ignoredtags = "<p><img><br><li><hr>";
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var match;
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var tagpaired = [];
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var tagremove = [];
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var needsRemoval = false;
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// loop through matched tags in forward order
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for (var ctag = 0; ctag < tagcount; ctag++) {
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tagname = tags[ctag].replace(/<\/?(\w+).*/, "$1");
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// skip any already paired tags
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// and skip tags in our ignore list; assume they're self-closed
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if (tagpaired[ctag] || ignoredtags.search("<" + tagname + ">") > -1)
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continue;
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tag = tags[ctag];
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match = -1;
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if (!/^<\//.test(tag)) {
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// this is an opening tag
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// search forwards (next tags), look for closing tags
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for (var ntag = ctag + 1; ntag < tagcount; ntag++) {
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if (!tagpaired[ntag] && tags[ntag] == "</" + tagname + ">") {
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match = ntag;
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break;
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}
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}
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}
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if (match == -1)
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needsRemoval = tagremove[ctag] = true; // mark for removal
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else
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tagpaired[match] = true; // mark paired
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}
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if (!needsRemoval)
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return html;
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// delete all orphaned tags from the string
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var ctag = 0;
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html = html.replace(re, function (match) {
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var res = tagremove[ctag] ? "" : match;
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ctag++;
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return res;
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});
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return html;
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}
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})();
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