Learn JavaScript Programming

Master JavaScript from basics to advanced concepts with clear explanations and practical examples.

Start Learning Try JavaScript Online
Tutorial Contents
Getting Started
Fundamentals
Functions & Data
Browser APIs
Advanced

Getting Started with JavaScript

To begin, install a modern browser (Chrome, Firefox, Safari) and a code editor like VS Code. Create an HTML file and add your JavaScript inline using a <script> tag or in a separate file linked with <script src>. External scripts are easier to maintain, cache, and reuse.

Best practice: Use defer or type="module" to ensure scripts load after the HTML is parsed. This improves performance and prevents errors when accessing DOM elements that are not yet available.

Inline Script
<!DOCTYPE html>
<html>
<body>
  <h1>JS Demo</h1>
  <script>
    console.log('Inline script loaded');
  </script>
</body>
</html>
External Script
<!DOCTYPE html>
<html>
<body>
  <h1>JS Demo</h1>
  <script src="app.js" defer></script>
</body>
</html>
// app.js
console.log('External script loaded');
Tip: Use defer to load scripts after HTML parsing. For ES modules, prefer <script type="module" src="app.js"> and organize your code with imports/exports.
}

Frequently Asked Questions

JavaScript is used to build interactive websites, single-page applications, and servers with Node.js. It controls the DOM, handles events, and communicates with APIs.

Basic HTML and CSS knowledge helps, especially for DOM manipulation, but you can start learning JavaScript directly and pick up HTML/CSS basics along the way.

With regular practice, basics can be learned in 2–4 weeks. Mastery of ES6+, asynchronous programming, and frameworks typically takes a few months of consistent learning.

A modern browser (Chrome/Firefox) and a code editor (VS Code). Optionally, Node.js for running JavaScript outside the browser and using npm packages.
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Master JavaScript with Our Beginner-Friendly Tutorial

Learn modern JavaScript step by step with examples you can run and modify. Build interactive web pages, handle events, manipulate the DOM, and work with APIs confidently.

What You'll Learn

  • Variables, data types, and operators
  • Functions and array methods
  • Objects, classes, and prototypes
  • DOM and events
  • JSON and API calls
  • Promises and async/await
  • Modules and modern tooling
  • Best practices and tips

Our tutorial is crafted for clarity, SEO-friendly readability, and a smooth learning experience on mobile devices.

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