HTML JavaScript

An HTML webpage can be made more visually appealing, dynamic, and interactive by using scripts, which are little programs that work with HTML to create features like mouse-click alert popup windows. Websites currently employ JavaScript, which is the most widely used scripting language.

A script is a small program that you may use to give your website more interaction. A script could, for instance, provide a drop-down menu or produce an alert box message that pops up. One might write this script in VBScript or JavaScript.

Using any scripting language, you may create a variety of little functions known as event handlers, and you can use HTML properties to start those processes.

These days, the majority of web developers solely utilize JavaScript and related frameworks; several popular browsers do not even support VBScript.

JavaScript code can be defined directly within the HTML content, or it can be stored in a separate file and then included as needed. With relevant examples, let’s examine each case individually.


How to use JavaScript files in HTML?

You can include JavaScript in your HTML code in two different ways:

  • Including a Script Inside
  • Integrating an External Script

Including a Script Inside

In HTML documents, JavaScript code can be included directly by adding an internal script.

Integrating an External Script

If you have multiple HTML files with the same script, we can place our JavaScript code in a different file and call it from the HTML file. Use the.js extension to save JavaScript external files.


<!DOCTYPE html>
<html lang="en">
    <title>HTML with External JavaScript</title>
    <script src="script.js"></script>
    <h1>External JavaScript Example</h1>
    <button onclick="showMessage()">Click me</button>

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