為什么最后一個(gè)節(jié)點(diǎn)不是空白節(jié)點(diǎn)，剛開(kāi)始我以為是瀏覽器兼容問(wèn)題，沒(méi)識(shí)別空白節(jié)點(diǎn)，但測(cè)試了下，發(fā)現(xiàn)瀏覽器識(shí)別了空白節(jié)點(diǎn)，就不知道是哪的問(wèn)題了，來(lái)請(qǐng)教下大神們
<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>無(wú)標(biāo)題文檔</title>
</head>
<body>
<ul?id="con">
<li?id="lesson1">javascript
??<ul>?
??????<li?id="tcon">?基礎(chǔ)語(yǔ)法</li>
??????<li>流程控制語(yǔ)句</li>
??????<li>函數(shù)</li>
??????<li>事件</li>
??????<li>DOM</li>
??</ul>
</li>
<li?id="lesson2">das</li>
<li?id="lesson3">dadf</li>
<li?id="lesson4">HTML/CSS?
??<ul>
????<li>文字</li>
????<li>段落</li>
????<li>表單</li>
????<li>表格</li>??
??</ul>?
</li></ul>??
<script??type="text/javascript">????
???var?mylist?=?document.getElementById("tcon");?
???var?x=mylist.parentNode.parentNode.parentNode.lastChild;
???document.write(x.innerHTML);
???var?y=mylist.parentNode.parentNode.parentNode.childNodes;
???document.write(y.length);
???for(var?i=0;i<y.length;i++){
??? document.write("第"+(i+1)+"個(gè)節(jié)點(diǎn)的節(jié)點(diǎn)名稱(chēng):"+y[i].nodeName+"</br>");
???}???
</script>?
</body>
</html>下面是運(yùn)行結(jié)果
2017-08-16
</li></ul> 這里連著一起的吧，你試試把這里分開(kāi)會(huì)不會(huì)有空白節(jié)點(diǎn)