Using appendChild with IE in Javascript

问题

I am having trouble with this code in IE (with Chrome it seems to work fine):

<html>
<body>
<script type="text/javascript">
    var scriptContent = "var whatever=1";
    var _js = document.createElement('script');
    _js.setAttribute('type', 'text/javascript');
    textNode = document.createTextNode(scriptContent);
    _js.appendChild(textNode);  
    document.getElementsByTagName('body')[0].appendChild(_js);
</script>
</body>
</html>

The error I get in Internet Explorer (IE9) is: "unexpected call to a method or access to a property" on statement "_js.appendChild(textNode)".

Is there any way to work around this problem?

回答1:

As you can see here appendChild() in IE is not applied to <script>-elements. (Seems as if IE9 supports it, but it depends on the browser-mode)

There was an correct answer before by Nivas, unfortunately it has been deleted. In IE use

_js.text = scriptContent;

回答2:

Your script is being executed before the DOM is ready, so getting the <body> tag is a race condition. I actually get the same error in Chrome 15 and Firefox 8.

You can see the code works when called after the page is loaded, for example in a function

HTML

<a href="#" onclick="return append()">append</a>

JavaScript

function append() {
    var scriptContent = "var whatever=1";
    var _js = document.createElement('script');
    _js.setAttribute('type', 'text/javascript');
    textNode = document.createTextNode(scriptContent);
    _js.appendChild(textNode);  
    document.getElementsByTagName('body')[0].appendChild(_js);
    return false;
}

来源：https://stackoverflow.com/questions/7090198/using-appendchild-with-ie-in-javascript

标签

javascript

internet-explorer

appendchild