HTML JavaScript
JavaScript is a programming language that allows you to add interactivity and dynamic behavior to your web pages. You can include JavaScript code directly within your HTML document or link to external JavaScript files.
1. Inline JavaScript
You can embed JavaScript code directly within your HTML document using the <script> element.
Example:
<button onclick="alert('Hello, world!')">Click me</button>2. External JavaScript File
You can also create a separate JavaScript file and link it to your HTML document using the <script> element with the src attribute.
Example:
Create a file named script.js with the following content:
// script.js
alert('Hello from external JavaScript file!');
Link the external JavaScript file in your HTML document:
<script src="script.js"></script>3. JavaScript Events
JavaScript events allow you to trigger code execution based on user interactions or other actions.
Example:
<button id="eventButton">Click me</button>
4. DOM Manipulation
The Document Object Model (DOM) is a programming interface that allows you to manipulate HTML elements and their attributes.
Example:
5. JavaScript Libraries
JavaScript libraries like jQuery provide additional functionalities and simplify common tasks such as DOM manipulation and event handling.
Example:
This example uses jQuery to change the text of a paragraph element.
This text will be replaced by jQuery.
Conclusion
JavaScript is a powerful tool for adding interactivity and dynamic behavior to your web pages. By understanding its fundamentals and capabilities, you can create engaging and interactive web experiences for your users.