jQuery.clean使用方法及思路分析

                 }
                 // 处理是html标签字符串的数组项
                 else {
                     // Ensure a safe container in which to render the html
                     // safe为#document-fragment类型,在ie9以下浏览器中,safe为HTMLDocument类型节点,且nodeNames数组为空
                     safe = safe || createSafeFragment( context );
                     // 创建一个div元素并将其插入到文档碎片中
                     div = context.createElement(“div”);
                     safe.appendChild( div );
                     // Fix “XHTML”-style tags in all browsers
                     // 除了area,br,col,embed,hr,img,input,link,meta,param这些标签外,
                     // 将开始标签末尾加入斜杠的标签转换为开始和结束标签
                     elem = elem.replace(rxhtmlTag, “<$1></$2>”);
                     // Go to html and back, then peel off extra wrappers
                     // 获取左边第一个标签元素
                     tag = ( rtagName.exec( elem ) || [“”, “”] )[1].toLowerCase();
                     // 获取最外层元素的包裹元素,并将元素包裹在其中
                     wrap = wrapMap[ tag ] || wrapMap._default;