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I'm trying to get the element with getElementById(), but it returns null even though the element exists. What am I doing wrong?
<html>
<head>
<title>blah</title>
<script type="text/javascript">
alert(document.getElementById("abc"));
</script>
</head>
<body>
<div id="abc">
</div>
</body>
714
This error TypeError: document. getelementbyid(...) is null would seem to indicate that there is no such element with an ID passed to getElementById() exist. This can happen if the JavaScript code is executed before the page is fully loaded, so its not able to find the element.
To solve the "getElementById is not a function" error, make sure to spell the getElementById() method correctly, as it is case-sensitive, and only call the method on the document object, e.g. document. getElementById('btn') . Copied! Now we are able to call the getElementById method on the document object.
The Document method getElementById() returns an Element object representing the element whose id property matches the specified string. Since element IDs are required to be unique if specified, they're a useful way to get access to a specific element quickly.
You have to put this in a document load event. The DOM hasn't gotten to abc by the time the script is executed.
78
Your script runs before the DOM has been loaded. To fix this you can place your code in the window.onload function like so:
window.onload = function() {
alert(document.getElementById("abc"));
};
An alternative is to place your script right before the closing </body> tag.
50
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