HTML and JavaScript
HTML and JavaScript
JavaScript is a programming language that allows you to make your HTML web pages interactive and dynamic.
You can add JavaScript to HTML using the <script> tag.
Ways to Add JavaScript
-
Inline JavaScript – Directly inside an HTML element using an event.
-
onclick→ Event triggers when button is clicked -
Shows an alert message
-
Internal JavaScript – Inside a
<script>tag in the<head>or<body>.
-
External JavaScript – In a separate
.jsfile linked to HTML.
HTML File:
script.js File:
HTML Button:
Common JavaScript Uses in HTML
-
Display alerts or messages
-
Validate form data
-
Change HTML content dynamically
-
React to user actions like clicks, hover, etc.
-
Animate elements or update styles
Key Points
-
<script>can be placed in<head>or at the end of<body> -
External JS files make code cleaner and reusable
-
JavaScript adds interactivity to otherwise static HTML pages
