how to check document.getelementbyid is null or not code example

Example: javascript typeerror document.getelementbyid(...) is null

This can happen if the JavaScript code is executed before the
page is fully loaded. Try moving the <script> in the HTML
document to the end. For example:

<html>
<body>
  // HTML Code
  <script src="filename.js"></script>
</body>
</html>

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Javascript Example

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