How to Delay the Loading of an External JavaScript File?

Estimated read time 2 min read

You can delay the loading of an external JavaScript file by dynamically creating a script element and appending it to the head section of the HTML document. You can use the setTimeout() function to delay the creation of the script element, which in turn delays the loading of the external JavaScript file.

Here’s an example:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Delayed loading of external JavaScript file</title>
  <script>
    setTimeout(function() {
      var script = document.createElement('script');
      script.src = 'path/to/your/script.js';
      document.head.appendChild(script);
    }, 3000); // Delay the loading of the script by 3 seconds
  </script>
</head>
<body>
  <!-- Your HTML content here -->
</body>
</html>

In this example, we use the setTimeout() function to delay the execution of the code that creates the script element. The setTimeout() function takes two arguments: a function to execute after the specified delay, and the delay time in milliseconds. In this case, we delay the creation of the script element by 3 seconds (3000 milliseconds).

Inside the function passed to setTimeout(), we create a new script element and set its src attribute to the path of your external JavaScript file. We then append the script element to the head section of the HTML document using document.head.appendChild(script).

This delays the loading of the external JavaScript file by 3 seconds, which gives your page time to render before the JavaScript is loaded and executed. You can adjust the delay time as needed based on the requirements of your page.

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