小编xia*_*hao的帖子

在YUI文档中; http://yuilibrary.com/yui/docs/api/files/dom_js_dom-create.js.html

if (nodes.length === 1) { // return single node, breaking parentNode ref from "fragment"
            ret = nodes[0].parentNode.removeChild(nodes[0]);
        } else if (nodes[0] && nodes[0].className === 'yui3-big-dummy') { // using dummy node to preserve some attributes (e.g. OPTION not selected)
            if (nodes.length === 2) {
                ret = nodes[0].nextSibling;
            } else {
                nodes[0].parentNode.removeChild(nodes[0]); 
                ret = Y_DOM._nl2frag(nodes, doc);
            }
        } else { // return multiple nodes as a fragment
             ret = Y_DOM._nl2frag(nodes, doc);
        }

第110行说

} else if(nodes [0] && nodes [0] …