jQuery.clean使用方法及思路分析

                     return scripts ?
                         scripts.push( elem.parentNode ? elem.parentNode.removeChild( elem ) : elem ) :
                         fragment.appendChild( elem );
                 }
             };
             for ( i = 0; (elem = ret[i]) != null; i++ ) {
                 // Check if we’re done after handling an executable script
                 if ( !( jQuery.nodeName( elem, “script” ) && handleScript( elem ) ) ) {
                     // Append to fragment and handle embedded scripts
                     // 将elem元素添加到文档碎片中并处理嵌入的脚本(script标签元素)
                     fragment.appendChild( elem );
                     if ( typeof elem.getElementsByTagName !== “undefined” ) {
                         // handleScript alters the DOM, so use jQuery.merge to ensure snapshot iteration
                         jsTags = jQuery.grep( jQuery.merge( [], elem.getElementsByTagName(“script”) ), handleScript );
                         // Splice the scripts into ret after their former ancestor and advance our index beyond them
                         // 将script标签添加到数组，位置为其原父元素索引位置后
                         ret.splice.apply( ret, [i + 1, 0].concat( jsTags ) );