nodeValue有什么问题？

Question

// html
<div>Hello World!</div>

// Javascript
var textNode = div.firstChild;
textNode.nodeValue = "Hello Us";

The sample: sample Why can`ti change the text content?

Answer 1

Your problem was you weren't declaring your div variable. I presume you must have got some error. Just reference the div for which you want to change the nodeValue and everything seems good.. Below, I've referred it with getElementsByTagName , you can use any of other options if required.

 // Javascript var div=document.getElementsByTagName('div')[0]; var textNode = div.firstChild; textNode.nodeValue = "Hello Us"; console.log(textNode.nodeValue); 

 <div>Hello World!</div> 

Answer 2

I would suggest you to include an id attribute to that div since it is very likely you have other divs and that can give you trouble.

// html
<div id="myDivId">Hello World!</div>

// Javascript
var node = document.getElementById("myDivId");
node.textContent = "Hello Us";

if you are using jQuery, easier:

jQuery("#myDivId").html("Hello Us");