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    <h3>Editing: htmlhint.js</h3>
    <textarea name="content" rows="20" cols="80">/*!
 * HTMLHint v0.9.14
 * https://github.com/yaniswang/HTMLHint
 *
 * (c) 2014-2017 Yanis Wang &lt;yanis.wang@gmail.com&gt;.
 * MIT Licensed
 */
var HTMLHint=function(e){function t(e,t){return Array(e+1).join(t||&quot; &quot;)}var a={};return a.version=&quot;0.9.14&quot;,a.release=&quot;20170826&quot;,a.rules={},a.defaultRuleset={&quot;tagname-lowercase&quot;:!0,&quot;attr-lowercase&quot;:!0,&quot;attr-value-double-quotes&quot;:!0,&quot;doctype-first&quot;:!0,&quot;tag-pair&quot;:!0,&quot;spec-char-escape&quot;:!0,&quot;id-unique&quot;:!0,&quot;src-not-empty&quot;:!0,&quot;attr-no-duplication&quot;:!0,&quot;title-require&quot;:!0},a.addRule=function(e){a.rules[e.id]=e},a.verify=function(t,n){(n===e||0===Object.keys(n).length)&amp;&amp;(n=a.defaultRuleset),t=t.replace(/^\s*&lt;!--\s*htmlhint\s+([^\r\n]+?)\s*--&gt;/i,function(t,a){return n===e&amp;&amp;(n={}),a.replace(/(?:^|,)\s*([^:,]+)\s*(?:\:\s*([^,\s]+))?/g,function(t,a,r){&quot;false&quot;===r?r=!1:&quot;true&quot;===r&amp;&amp;(r=!0),n[a]=r===e?!0:r}),&quot;&quot;});var r,i=new HTMLParser,s=new a.Reporter(t,n),o=a.rules;for(var l in n)r=o[l],r!==e&amp;&amp;n[l]!==!1&amp;&amp;r.init(i,s,n[l]);return i.parse(t),s.messages},a.format=function(e,a){a=a||{};var n=[],r={white:&quot;&quot;,grey:&quot;&quot;,red:&quot;&quot;,reset:&quot;&quot;};a.colors&amp;&amp;(r.white=&quot;[37m&quot;,r.grey=&quot;[90m&quot;,r.red=&quot;[31m&quot;,r.reset=&quot;[39m&quot;);var i=a.indent||0;return e.forEach(function(e){var a=40,s=a+20,o=e.evidence,l=e.line,u=e.col,d=o.length,c=u&gt;a+1?u-a:1,f=o.length&gt;u+s?u+s:d;a+1&gt;u&amp;&amp;(f+=a-u+1),o=o.replace(/\t/g,&quot; &quot;).substring(c-1,f),c&gt;1&amp;&amp;(o=&quot;...&quot;+o,c-=3),d&gt;f&amp;&amp;(o+=&quot;...&quot;),n.push(r.white+t(i)+&quot;L&quot;+l+&quot; |&quot;+r.grey+o+r.reset);var g=u-c,h=o.substring(0,g).match(/[^\u0000-\u00ff]/g);null!==h&amp;&amp;(g+=h.length),n.push(r.white+t(i)+t((l+&quot;&quot;).length+3+g)+&quot;^ &quot;+r.red+e.message+&quot; (&quot;+e.rule.id+&quot;)&quot;+r.reset)}),n},a}();&quot;object&quot;==typeof exports&amp;&amp;exports&amp;&amp;(exports.HTMLHint=HTMLHint),function(e){var t=function(){var e=this;e._init.apply(e,arguments)};t.prototype={_init:function(e,t){var a=this;a.html=e,a.lines=e.split(/\r?\n/);var n=e.match(/\r?\n/);a.brLen=null!==n?n[0].length:0,a.ruleset=t,a.messages=[]},error:function(e,t,a,n,r){this.report(&quot;error&quot;,e,t,a,n,r)},warn:function(e,t,a,n,r){this.report(&quot;warning&quot;,e,t,a,n,r)},info:function(e,t,a,n,r){this.report(&quot;info&quot;,e,t,a,n,r)},report:function(e,t,a,n,r,i){for(var s,o,l=this,u=l.lines,d=l.brLen,c=a-1,f=u.length;f&gt;c&amp;&amp;(s=u[c],o=s.length,n&gt;o&amp;&amp;f&gt;a);c++)a++,n-=o,1!==n&amp;&amp;(n-=d);l.messages.push({type:e,message:t,raw:i,evidence:s,line:a,col:n,rule:{id:r.id,description:r.description,link:&quot;https://github.com/yaniswang/HTMLHint/wiki/&quot;+r.id}})}},e.Reporter=t}(HTMLHint);var HTMLParser=function(e){var t=function(){var e=this;e._init.apply(e,arguments)};return t.prototype={_init:function(){var e=this;e._listeners={},e._mapCdataTags=e.makeMap(&quot;script,style&quot;),e._arrBlocks=[],e.lastEvent=null},makeMap:function(e){for(var t={},a=e.split(&quot;,&quot;),n=0;a.length&gt;n;n++)t[a[n]]=!0;return t},parse:function(t){function a(t,a,n,r){var i=n-b+1;r===e&amp;&amp;(r={}),r.raw=a,r.pos=n,r.line=w,r.col=i,L.push(r),c.fire(t,r);for(var s;s=m.exec(a);)w++,b=n+m.lastIndex}var n,r,i,s,o,l,u,d,c=this,f=c._mapCdataTags,g=/&lt;(?:\/([^\s&gt;]+)\s*|!--([\s\S]*?)--|!([^&gt;]*?)|([\w\-:]+)((?:\s+[^\s&quot;'&gt;\/=\x00-\x0F\x7F\x80-\x9F]+(?:\s*=\s*(?:&quot;[^&quot;]*&quot;|'[^']*'|[^\s&quot;'&gt;]*))?)*?)\s*(\/?))&gt;/g,h=/\s*([^\s&quot;'&gt;\/=\x00-\x0F\x7F\x80-\x9F]+)(?:\s*=\s*(?:(&quot;)([^&quot;]*)&quot;|(')([^']*)'|([^\s&quot;'&gt;]*)))?/g,m=/\r?\n/g,p=0,v=0,b=0,w=1,L=c._arrBlocks;for(c.fire(&quot;start&quot;,{pos:0,line:1,col:1});n=g.exec(t);)if(r=n.index,r&gt;p&amp;&amp;(d=t.substring(p,r),o?u.push(d):a(&quot;text&quot;,d,p)),p=g.lastIndex,!(i=n[1])||(o&amp;&amp;i===o&amp;&amp;(d=u.join(&quot;&quot;),a(&quot;cdata&quot;,d,v,{tagName:o,attrs:l}),o=null,l=null,u=null),o))if(o)u.push(n[0]);else if(i=n[4]){s=[];for(var y,T=n[5],H=0;y=h.exec(T);){var x=y[1],M=y[2]?y[2]:y[4]?y[4]:&quot;&quot;,N=y[3]?y[3]:y[5]?y[5]:y[6]?y[6]:&quot;&quot;;s.push({name:x,value:N,quote:M,index:y.index,raw:y[0]}),H+=y[0].length}H===T.length?(a(&quot;tagstart&quot;,n[0],r,{tagName:i,attrs:s,close:n[6]}),f[i]&amp;&amp;(o=i,l=s.concat(),u=[],v=p)):a(&quot;text&quot;,n[0],r)}else(n[2]||n[3])&amp;&amp;a(&quot;comment&quot;,n[0],r,{content:n[2]||n[3],&quot;long&quot;:n[2]?!0:!1});else a(&quot;tagend&quot;,n[0],r,{tagName:i});t.length&gt;p&amp;&amp;(d=t.substring(p,t.length),a(&quot;text&quot;,d,p)),c.fire(&quot;end&quot;,{pos:p,line:w,col:t.length-b+1})},addListener:function(t,a){for(var n,r=this._listeners,i=t.split(/[,\s]/),s=0,o=i.length;o&gt;s;s++)n=i[s],r[n]===e&amp;&amp;(r[n]=[]),r[n].push(a)},fire:function(t,a){a===e&amp;&amp;(a={}),a.type=t;var n=this,r=[],i=n._listeners[t],s=n._listeners.all;i!==e&amp;&amp;(r=r.concat(i)),s!==e&amp;&amp;(r=r.concat(s));var o=n.lastEvent;null!==o&amp;&amp;(delete o.lastEvent,a.lastEvent=o),n.lastEvent=a;for(var l=0,u=r.length;u&gt;l;l++)r[l].call(n,a)},removeListener:function(t,a){var n=this._listeners[t];if(n!==e)for(var r=0,i=n.length;i&gt;r;r++)if(n[r]===a){n.splice(r,1);break}},fixPos:function(e,t){var a,n=e.raw.substr(0,t),r=n.split(/\r?\n/),i=r.length-1,s=e.line;return i&gt;0?(s+=i,a=r[i].length+1):a=e.col+t,{line:s,col:a}},getMapAttrs:function(e){for(var t,a={},n=0,r=e.length;r&gt;n;n++)t=e[n],a[t.name]=t.value;return a}},t}();&quot;object&quot;==typeof exports&amp;&amp;exports&amp;&amp;(exports.HTMLParser=HTMLParser),HTMLHint.addRule({id:&quot;alt-require&quot;,description:&quot;The alt attribute of an &lt;img&gt; element must be present and alt attribute of area[href] and input[type=image] must have a value.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(n){var r,i=n.tagName.toLowerCase(),s=e.getMapAttrs(n.attrs),o=n.col+i.length+1;&quot;img&quot;!==i||&quot;alt&quot;in s?(&quot;area&quot;===i&amp;&amp;&quot;href&quot;in s||&quot;input&quot;===i&amp;&amp;&quot;image&quot;===s.type)&amp;&amp;(&quot;alt&quot;in s&amp;&amp;&quot;&quot;!==s.alt||(r=&quot;area&quot;===i?&quot;area[href]&quot;:&quot;input[type=image]&quot;,t.warn(&quot;The alt attribute of &quot;+r+&quot; must have a value.&quot;,n.line,o,a,n.raw))):t.warn(&quot;An alt attribute must be present on &lt;img&gt; elements.&quot;,n.line,o,a,n.raw)})}}),HTMLHint.addRule({id:&quot;attr-lowercase&quot;,description:&quot;All attribute names must be in lowercase.&quot;,init:function(e,t,a){var n=this,r=Array.isArray(a)?a:[];e.addListener(&quot;tagstart&quot;,function(e){for(var a,i=e.attrs,s=e.col+e.tagName.length+1,o=0,l=i.length;l&gt;o;o++){a=i[o];var u=a.name;-1===r.indexOf(u)&amp;&amp;u!==u.toLowerCase()&amp;&amp;t.error(&quot;The attribute name of [ &quot;+u+&quot; ] must be in lowercase.&quot;,e.line,s+a.index,n,a.raw)}})}}),HTMLHint.addRule({id:&quot;attr-no-duplication&quot;,description:&quot;Elements cannot have duplicate attributes.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r,i=e.attrs,s=e.col+e.tagName.length+1,o={},l=0,u=i.length;u&gt;l;l++)n=i[l],r=n.name,o[r]===!0&amp;&amp;t.error(&quot;Duplicate of attribute name [ &quot;+n.name+&quot; ] was found.&quot;,e.line,s+n.index,a,n.raw),o[r]=!0})}}),HTMLHint.addRule({id:&quot;attr-unsafe-chars&quot;,description:&quot;Attribute values cannot contain unsafe chars.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r,i=e.attrs,s=e.col+e.tagName.length+1,o=/[\u0000-\u0008\u000b\u000c\u000e-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/,l=0,u=i.length;u&gt;l;l++)if(n=i[l],r=n.value.match(o),null!==r){var d=escape(r[0]).replace(/%u/,&quot;\\u&quot;).replace(/%/,&quot;\\x&quot;);t.warn(&quot;The value of attribute [ &quot;+n.name+&quot; ] cannot contain an unsafe char [ &quot;+d+&quot; ].&quot;,e.line,s+n.index,a,n.raw)}})}}),HTMLHint.addRule({id:&quot;attr-value-double-quotes&quot;,description:&quot;Attribute values must be in double quotes.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r=e.attrs,i=e.col+e.tagName.length+1,s=0,o=r.length;o&gt;s;s++)n=r[s],(&quot;&quot;!==n.value&amp;&amp;'&quot;'!==n.quote||&quot;&quot;===n.value&amp;&amp;&quot;'&quot;===n.quote)&amp;&amp;t.error(&quot;The value of attribute [ &quot;+n.name+&quot; ] must be in double quotes.&quot;,e.line,i+n.index,a,n.raw)})}}),HTMLHint.addRule({id:&quot;attr-value-not-empty&quot;,description:&quot;All attributes must have values.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r=e.attrs,i=e.col+e.tagName.length+1,s=0,o=r.length;o&gt;s;s++)n=r[s],&quot;&quot;===n.quote&amp;&amp;&quot;&quot;===n.value&amp;&amp;t.warn(&quot;The attribute [ &quot;+n.name+&quot; ] must have a value.&quot;,e.line,i+n.index,a,n.raw)})}}),HTMLHint.addRule({id:&quot;csslint&quot;,description:&quot;Scan css with csslint.&quot;,init:function(e,t,a){var n=this;e.addListener(&quot;cdata&quot;,function(e){if(&quot;style&quot;===e.tagName.toLowerCase()){var r;if(r=&quot;object&quot;==typeof exports&amp;&amp;require?require(&quot;csslint&quot;).CSSLint.verify:CSSLint.verify,void 0!==a){var i=e.line-1,s=e.col-1;try{var o=r(e.raw,a).messages;o.forEach(function(e){var a=e.line;t[&quot;warning&quot;===e.type?&quot;warn&quot;:&quot;error&quot;](&quot;[&quot;+e.rule.id+&quot;] &quot;+e.message,i+a,(1===a?s:0)+e.col,n,e.evidence)})}catch(l){}}}})}}),HTMLHint.addRule({id:&quot;doctype-first&quot;,description:&quot;Doctype must be declared first.&quot;,init:function(e,t){var a=this,n=function(r){&quot;start&quot;===r.type||&quot;text&quot;===r.type&amp;&amp;/^\s*$/.test(r.raw)||((&quot;comment&quot;!==r.type&amp;&amp;r.long===!1||/^DOCTYPE\s+/i.test(r.content)===!1)&amp;&amp;t.error(&quot;Doctype must be declared first.&quot;,r.line,r.col,a,r.raw),e.removeListener(&quot;all&quot;,n))};e.addListener(&quot;all&quot;,n)}}),HTMLHint.addRule({id:&quot;doctype-html5&quot;,description:'Invalid doctype. Use: &quot;&lt;!DOCTYPE html&gt;&quot;',init:function(e,t){function a(e){e.long===!1&amp;&amp;&quot;doctype html&quot;!==e.content.toLowerCase()&amp;&amp;t.warn('Invalid doctype. Use: &quot;&lt;!DOCTYPE html&gt;&quot;',e.line,e.col,r,e.raw)}function n(){e.removeListener(&quot;comment&quot;,a),e.removeListener(&quot;tagstart&quot;,n)}var r=this;e.addListener(&quot;all&quot;,a),e.addListener(&quot;tagstart&quot;,n)}}),HTMLHint.addRule({id:&quot;head-script-disabled&quot;,description:&quot;The &lt;script&gt; tag cannot be used in a &lt;head&gt; tag.&quot;,init:function(e,t){function a(a){var n=e.getMapAttrs(a.attrs),o=n.type,l=a.tagName.toLowerCase();&quot;head&quot;===l&amp;&amp;(s=!0),s!==!0||&quot;script&quot;!==l||o&amp;&amp;i.test(o)!==!0||t.warn(&quot;The &lt;script&gt; tag cannot be used in a &lt;head&gt; tag.&quot;,a.line,a.col,r,a.raw)}function n(t){&quot;head&quot;===t.tagName.toLowerCase()&amp;&amp;(e.removeListener(&quot;tagstart&quot;,a),e.removeListener(&quot;tagend&quot;,n))}var r=this,i=/^(text\/javascript|application\/javascript)$/i,s=!1;e.addListener(&quot;tagstart&quot;,a),e.addListener(&quot;tagend&quot;,n)}}),HTMLHint.addRule({id:&quot;href-abs-or-rel&quot;,description:&quot;An href attribute must be either absolute or relative.&quot;,init:function(e,t,a){var n=this,r=&quot;abs&quot;===a?&quot;absolute&quot;:&quot;relative&quot;;e.addListener(&quot;tagstart&quot;,function(e){for(var a,i=e.attrs,s=e.col+e.tagName.length+1,o=0,l=i.length;l&gt;o;o++)if(a=i[o],&quot;href&quot;===a.name){(&quot;absolute&quot;===r&amp;&amp;/^\w+?:/.test(a.value)===!1||&quot;relative&quot;===r&amp;&amp;/^https?:\/\//.test(a.value)===!0)&amp;&amp;t.warn(&quot;The value of the href attribute [ &quot;+a.value+&quot; ] must be &quot;+r+&quot;.&quot;,e.line,s+a.index,n,a.raw);break}})}}),HTMLHint.addRule({id:&quot;id-class-ad-disabled&quot;,description:&quot;The id and class attributes cannot use the ad keyword, it will be blocked by adblock software.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r,i=e.attrs,s=e.col+e.tagName.length+1,o=0,l=i.length;l&gt;o;o++)n=i[o],r=n.name,/^(id|class)$/i.test(r)&amp;&amp;/(^|[-\_])ad([-\_]|$)/i.test(n.value)&amp;&amp;t.warn(&quot;The value of attribute &quot;+r+&quot; cannot use the ad keyword.&quot;,e.line,s+n.index,a,n.raw)})}}),HTMLHint.addRule({id:&quot;id-class-value&quot;,description:&quot;The id and class attribute values must meet the specified rules.&quot;,init:function(e,t,a){var n,r=this,i={underline:{regId:/^[a-z\d]+(_[a-z\d]+)*$/,message:&quot;The id and class attribute values must be in lowercase and split by an underscore.&quot;},dash:{regId:/^[a-z\d]+(-[a-z\d]+)*$/,message:&quot;The id and class attribute values must be in lowercase and split by a dash.&quot;},hump:{regId:/^[a-z][a-zA-Z\d]*([A-Z][a-zA-Z\d]*)*$/,message:&quot;The id and class attribute values must meet the camelCase style.&quot;}};if(n=&quot;string&quot;==typeof a?i[a]:a,n&amp;&amp;n.regId){var s=n.regId,o=n.message;e.addListener(&quot;tagstart&quot;,function(e){for(var a,n=e.attrs,i=e.col+e.tagName.length+1,l=0,u=n.length;u&gt;l;l++)if(a=n[l],&quot;id&quot;===a.name.toLowerCase()&amp;&amp;s.test(a.value)===!1&amp;&amp;t.warn(o,e.line,i+a.index,r,a.raw),&quot;class&quot;===a.name.toLowerCase())for(var d,c=a.value.split(/\s+/g),f=0,g=c.length;g&gt;f;f++)d=c[f],d&amp;&amp;s.test(d)===!1&amp;&amp;t.warn(o,e.line,i+a.index,r,d)})}}}),HTMLHint.addRule({id:&quot;id-unique&quot;,description:&quot;The value of id attributes must be unique.&quot;,init:function(e,t){var a=this,n={};e.addListener(&quot;tagstart&quot;,function(e){for(var r,i,s=e.attrs,o=e.col+e.tagName.length+1,l=0,u=s.length;u&gt;l;l++)if(r=s[l],&quot;id&quot;===r.name.toLowerCase()){i=r.value,i&amp;&amp;(void 0===n[i]?n[i]=1:n[i]++,n[i]&gt;1&amp;&amp;t.error(&quot;The id value [ &quot;+i+&quot; ] must be unique.&quot;,e.line,o+r.index,a,r.raw));break}})}}),HTMLHint.addRule({id:&quot;inline-script-disabled&quot;,description:&quot;Inline script cannot be used.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r,i=e.attrs,s=e.col+e.tagName.length+1,o=/^on(unload|message|submit|select|scroll|resize|mouseover|mouseout|mousemove|mouseleave|mouseenter|mousedown|load|keyup|keypress|keydown|focus|dblclick|click|change|blur|error)$/i,l=0,u=i.length;u&gt;l;l++)n=i[l],r=n.name.toLowerCase(),o.test(r)===!0?t.warn(&quot;Inline script [ &quot;+n.raw+&quot; ] cannot be used.&quot;,e.line,s+n.index,a,n.raw):(&quot;src&quot;===r||&quot;href&quot;===r)&amp;&amp;/^\s*javascript:/i.test(n.value)&amp;&amp;t.warn(&quot;Inline script [ &quot;+n.raw+&quot; ] cannot be used.&quot;,e.line,s+n.index,a,n.raw)})}}),HTMLHint.addRule({id:&quot;inline-style-disabled&quot;,description:&quot;Inline style cannot be used.&quot;,init:function(e,t){var a=this;e.addListener(&quot;tagstart&quot;,function(e){for(var n,r=e.attrs,i=e.col+e.tagName.length+1,s=0,o=r.length;o&gt;s;s++)n=r[s],&quot;style&quot;===n.name.toLowerCase()&amp;&amp;t.warn(&quot;Inline style [ &quot;+n.raw+&quot; ] cannot be used.&quot;,e.line,i+n.index,a,n.raw)})}}),HTMLHint.addRule({id:&quot;jshint&quot;,description:&quot;Scan script with jshint.&quot;,init:function(e,t,a){var n=this;e.addListener(&quot;cdata&quot;,function(r){if(&quot;script&quot;===r.tagName.toLowerCase()){var i=e.getMapAttrs(r.attrs),s=i.type;if(void 0!==i.src||s&amp;&amp;/^(text\/javascript)$/i.test(s)===!1)return;var o;if(o=&quot;object&quot;==typeof exports&amp;&amp;require?require(&quot;jshint&quot;).JSHINT:JSHINT,void 0!==a){var l=r.line-1,u=r.col-1,d=r.raw.replace(/\t/g,&quot; &quot;);try{var c=o(d,a,a.globals);c===!1&amp;&amp;o.errors.forEach(function(e){var a=e.line;t.warn(e.reason,l+a,(1===a?u:0)+e.character,n,e.evidence)})}catch(f){}}}})}}),HTMLHint.addRule({id:&quot;space-tab-mixed-disabled&quot;,description:&quot;Do not mix tabs and spaces for indentation.&quot;,init:function(e,t,a){var n=this,r=&quot;nomix&quot;,i=null;if(&quot;string&quot;==typeof a){var s=a.match(/^([a-z]+)(\d+)?/);r=s[1],i=s[2]&amp;&amp;parseInt(s[2],10)}e.addListener(&quot;text&quot;,function(a){for(var s,o=a.raw,l=/(^|\r?\n)([ \t]+)/g;s=l.exec(o);){var u=e.fixPos(a,s.index+s[1].length);if(1===u.col){var d=s[2];&quot;space&quot;===r?i?(/^ +$/.test(d)===!1||0!==d.length%i)&amp;&amp;t.warn(&quot;Please use space for indentation and keep &quot;+i+&quot; 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