Introduction-tutorial
JavaScript is a high-level, dynamic, and object-oriented programming language that plays a crucial role in modern web development.
It is mainly used to make web pages interactive, dynamic, and user-friendly by running directly inside web browsers.
Whether its adding animation, validating forms, or handling user interactions - JavaScript makes websites come alive.
How to Add JavaScript to HTML
There are two main ways to include JavaScript in an HTML file
1. Internal JavaScript
You can write JavaScript code directly inside your HTML file using the <script> tag. This tag can be placed either inside the <head> or just before the closing </body> tag.
Example:
Whether its adding animation, validating forms, or handling user interactions - JavaScript makes websites come alive.
How to Add JavaScript to HTML
There are two main ways to include JavaScript in an HTML file
1. Internal JavaScript
You can write JavaScript code directly inside your HTML file using the <script> tag. This tag can be placed either inside the <head> or just before the closing </body> tag.
Example:
<!DOCTYPE html><html>
<head> <script> alert("Welcome to Quipoin!"); </script></head>
<body> <h1>Hello, World!</h1></body>
</html>2. External JavaScript
To keep your code clean and reusable, write JavaScript in a separate file with a .js extension, then link it to your HTML file using the <script src="filename.js"> tag.
script.js
alert("Hello from external JavaScript!");HTML file
<!DOCTYPE html><html>
<head> <script src="script.js"></script></head>
<body> <h1>Welcome to Quipoin</h1></body>
</html>Key Features of JavaScript
- Interactivity: Enables dynamic and interactive web pages that respond to user actions like clicks, mouse movements, and keyboard inputs.
- Dynamic Typing: No need to declare data types; variables can hold any type of data.
- Versatility: Beyond browsers, JavaScript can also be used in server-side development (Node.js), mobile apps, desktop apps, and even game development.
- Scripting Language: JavaScript runs line by line, making it perfect for automation, validation, and real-time updates.
JavaScript is an essential part of web development, helping transform static pages into engaging, dynamic experiences.
Whether you choose internal or external JavaScript, learning JS is a key skill for every modern web developer.
Whether you choose internal or external JavaScript, learning JS is a key skill for every modern web developer.