What is JavaScript?
JavaScript is a programming language that is commonly used to add interactive features to websites. It is a client-side language, which means that it is executed by the user's web browser rather than on a server. This allows for the creation of dynamic and responsive web pages that can interact with users in real-time.
Key Features of JavaScript
Interactivity: JavaScript allows you to create interactive web pages.
Client-Side Validation: Reduces server load by validating user input before sending it to the server.
Dynamic Content: Modify content on the webpage without reloading the entire page.
Event Handling: Respond to user actions like clicks, mouse movements, and keypresses.
Cross-Platform: Runs on any device with a web browser.
Getting Started with JavaScript.
Where to write JavaScript
You can write JavaScript directly in an HTML file within <script>
tags.
<!DOCTYPE html>
<html>
<head>
<title>My Website</title>
</head>
<body>
<script>
// Your JavaScript code here
</script>
</body>
</html>
You can also create a separate .js
file and link it to your HTML file.
- index.html
- style.css
- app.js
<!DOCTYPE html>
<html>
<head>
<title>My Website</title>
</head>
<body>
//linking js file to HTML file
<script src='app.js'></script>
</body>
</html>