javascript
  1. javascript-load
PreviousNext

JavaScript Load

JavaScript Load refers to the process of loading JavaScript files into an HTML document. It is important to load JavaScript files in the correct order to ensure that all dependencies are available to the script when it is executed.

Syntax

There are two ways to load JavaScript files into an HTML document:

Method 1: Using the <script> tag

<script src="path/to/script.js"></script>

Method 2: Using the DOMContentLoaded event

document.addEventListener("DOMContentLoaded", function() {
  // Your JavaScript code here
});

Example

Method 1: Using the <script> tag

<!DOCTYPE html>
<html>
<head>
  <title>JavaScript Load Example</title>
</head>
<body>
  <script src="path/to/script1.js"></script>
  <script src="path/to/script2.js"></script>
</body>
</html>

Method 2: Using the DOMContentLoaded event

<!DOCTYPE html>
<html>
<head>
  <title>JavaScript Load Example</title>
</head>
<body>
  <script>
    document.addEventListener("DOMContentLoaded", function() {
      // Your JavaScript code here
    });
  </script>
</body>
</html>

Output

The JavaScript files will be loaded and executed in the order they are declared in the HTML document.

Explanation

JavaScript files are loaded synchronously, meaning that they will block rendering of the page until the script has been fully loaded and executed. Therefore, it is recommended to load JavaScript files at the end of the <body> element, as this ensures that the page content is fully loaded before any JavaScript is loaded.

Using the DOMContentLoaded event ensures that the JavaScript code is executed only after the HTML document has been fully parsed and the DOM is ready to be manipulated.

Use

JavaScript Load is used when you want to add interactivity to your website or web application. It allows you to include external scripts and libraries that can enhance the functionality of your website or web application.

Important Points

  • It is recommended to load JavaScript files at the end of the <body> element.
  • Using the DOMContentLoaded event ensures that the JavaScript code is executed only after the HTML document has been fully parsed and the DOM is ready to be manipulated.
  • JavaScript files are loaded synchronously, meaning that they will block rendering of the page until the script has been fully loaded and executed.

Summary

JavaScript Load refers to the process of loading JavaScript files into an HTML document. It is important to load JavaScript files in the correct order and at the end of the <body> element to ensure that all dependencies are available to the script when it is executed. The DOMContentLoaded event can also be used to ensure that the JavaScript code is executed only after the HTML document has been fully parsed and the DOM is ready to be manipulated.

pasteunload
Published on: