jQuery.clean使用方法及思路分析

             }
         }
         return ret;
     }             
 });

2、源码分析

jQuery.extend({
     clean: function( elems, context, fragment, scripts ) {
         // 声明变量
         var i, j, elem, tag, wrap, depth, div, hasBody, tbody, len, handleScript, jsTags,
             safe = context === document && safeFragment,
             ret = [];
         // 确保变量context为文档根节点document
         if ( !context || typeof context.createDocumentFragment === “undefined” ) {
             context = document;
         }
         // Use the already-created safe fragment if context permits
         for ( i = 0; (elem = elems[i]) != null; i++ ) {
             // 如果elem为数字,则将其转换为字符串
             if ( typeof elem === “number” ) {
                 elem += “”;
             }
             // 如果elem为undefined,跳出本次循环
             if ( !elem ) {
                 continue;
             }
             // Convert html string into DOM nodes
             // 转换数组项(字符串)为DOM节点
             if ( typeof elem === “string” ) {
                 // 如果不存在html实体编号或标签,则创建文本节点
                 if ( !rhtml.test( elem ) ) {
                     elem = context.createTextNode( elem );