Javascript body.childNodes的nodeValue在哪里？
我运行了这段Javascript代码，获得了body.childNode的nodeType和nodeName，没有问题。但是，nodeValue无法显示Javascript body.childNodes的nodeValue在哪里？,javascript,dom,Javascript,Dom,我运行了这段Javascript代码，获得了body.childNode的nodeType和nodeName，没有问题。但是，nodeValue无法显示 <!DOCTYPE html> <html> <body> <p>Click the button to get the node types of the body element's child nodes.</p> <button onclick="myFunction(
<!DOCTYPE html>
<html>
<body>
<p>Click the button to get the node types of the body element's child nodes.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> Whitespace inside elements is considered as text, and text is considered as nodes.</p>
<!-- My personal comment goes here.. -->
<div><strong>Note:</strong> Comments in the document are considered as comment nodes.</div>
<p id="demo"></p>
<script>
function myFunction() {
var c = document.body.childNodes;
var txt = "";
var i;
for (i = 0; i < c.length; i++) {
txt = txt + "notdType: "+ c[i].nodeType + " NodeName: "+c[i].nodeName+" NodeValue: "+c[i].nodeValue +"<br>";
}
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>
单击该按钮以获取主体元素的子节点的节点类型
试试看
注意：元素内部的空白被视为文本，文本被视为节点
注意：文档中的注释被视为注释节点。
函数myFunction（）{
var c=document.body.childNodes；
var txt=“”；
var i；
对于（i=0；i”；
}
document.getElementById（“demo”）.innerHTML=txt；
}