菜鸟教程在线编辑器

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AI 编程工具
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
​
<p id="demo">单击按钮添加文本，单击另一个按钮标准化元素。</p>
<button onclick="addTextNode()">添加一个文本节点</button>
<button onclick="normPara()">规格化段落</button>
<script>
function addTextNode(){
    var y=document.createTextNode(" Click again");
    var x=document.getElementById("demo");
    x.appendChild(y);
    var z=document.getElementById("cc");
    z.innerHTML=x.childNodes.length;
}
function normPara(){
    var x=document.getElementById("demo");  
    x.normalize();
    var z=document.getElementById("cc");
    z.innerHTML=x.childNodes.length;
}
</script>
<p>上面的段落有 <span id="cc">1</span>子节点。</p>
​
</body>
</html>