S2OJ/web/js/classList.js

/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js*/
if(typeof document!=="undefined"&&!("classList" in document.createElement("a"))){(function(j){var a="classList",f="prototype",m=(j.HTMLElement||j.Element)[f],b=Object,k=String[f].trim||function(){return this.replace(/^\s+|\s+$/g,"")},c=Array[f].indexOf||function(q){var p=0,o=this.length;for(;p<o;p++){if(p in this&&this[p]===q){return p}}return -1},n=function(o,p){this.name=o;this.code=DOMException[o];this.message=p},g=function(p,o){if(o===""){throw new n("SYNTAX_ERR","An invalid or illegal string was specified")}if(/\s/.test(o)){throw new n("INVALID_CHARACTER_ERR","String contains an invalid character")}return c.call(p,o)},d=function(s){var r=k.call(s.className),q=r?r.split(/\s+/):[],p=0,o=q.length;for(;p<o;p++){this.push(q[p])}this._updateClassName=function(){s.className=this.toString()}},e=d[f]=[],i=function(){return new d(this)};n[f]=Error[f];e.item=function(o){return this[o]||null};e.contains=function(o){o+="";return g(this,o)!==-1};e.add=function(o){o+="";if(g(this,o)===-1){this.push(o);this._updateClassName()}};e.remove=function(p){p+="";var o=g(this,p);if(o!==-1){this.splice(o,1);this._updateClassName()}};e.toggle=function(o){o+="";if(g(this,o)===-1){this.add(o)}else{this.remove(o)}};e.toString=function(){return this.join(" ")};if(b.defineProperty){var l={get:i,enumerable:true,configurable:true};try{b.defineProperty(m,a,l)}catch(h){if(h.number===-2146823252){l.enumerable=false;b.defineProperty(m,a,l)}}}else{if(b[f].__defineGetter__){m.__defineGetter__(a,i)}}}(self))};