JavaScript Tutorial

JavaScript is the programming language of the web. It makes websites interactive, dynamic, and responsive. Along with HTML and CSS, it’s one of the three core technologies of the web.

  • Update and change HTML and CSS dynamically
  • React to user actions (clicks, keypress, form input, etc.)
  • Manipulate the DOM (Document Object Model)
  • Communicate with servers using AJAX & Fetch API
  • Use modern ES6+ features like let, const, arrow functions, classes, and modules
  • Handle asynchronous tasks with Promises and async/await

Example: Hello World


<!-- HTML + JS -->
<button onclick="alert('Hello, World!')">
  Click me
</button>
Try it Yourself »

Main Topics in this Tutorial

Tip: Start with the basics (syntax, variables, data types), then move to functions, DOM, and ES6 features. Practice every example with the Try it Yourself » editor to build confidence.