首頁 > 開發者 > JavaScript
如果對用戶端動態互動要求比較高，在DOM裡需要頻繁動態增加元素，那麼可能會遇到效能問題，那麼就有可能用到DocumentFragment了，具體看看下面的例子，效能差別還是挺大的。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script type="text/javascript">
function slowAdd() {
for (var i = 0; i < 10000; i++) {
var op = document.createElement("span");
var oText = document.createTextNode(i);
op.appendChild(oText);
document.body.appendChild(op);
}
}
function fastAdd(){
var oFragmeng = document.createDocumentFragment(); //建立文檔片段
for (var i = 0; i < 10000; i++) {
var op = document.createElement("span");
var oText = document.createTextNode(i);
op.appendChild(oText);
oFragmeng.appendChild(op);
}
document.body.appendChild(oFragmeng); //最後一次性添加到document中
}
</script>
</head>
<body>
<p>
<input id="Button1" type="button" value="button" onclick = "slowAdd()"/></p>
<p>
<input id="Button2" type="button" value="button" onclick = "fastAdd()"/></p>
</body>
</html>
參考資源:http://www.cssrain.cn/article.asp?id=1421
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
