JavaScript • 18 lessons

Make pages respond to your visitors.

Name: JavaScript Course
Author: Jiyasrul Alom Juwel

Add interactivity with the language of the web.

Start Lesson 1 → All Tracks

18 lessons · 18 live examples · 100% free

Preview — JavaScript

const btn = document.getElementById("btn");
btn.addEventListener("click", () => {
  alert("Hello!");
});

javascriptdomevents

JavaScript tutorial

Learn JavaScript — best way in 2026

Searching for javascript tutorial (299) or best way to learn javascript (1,949)? This 18-lesson track is the fastest way — live editor on every lesson.

What is JavaScript?

What is JavaScript? The language that makes pages interactive. Our Introduction explains JavaScript vs HTML/CSS with a live button you can click.

JavaScript tutorial for beginners — variables to DOM

Go from Variables and Functions to DOM, Events, Fetch and JSON. Each lesson has a runnable example.

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Build real interactivity

Make counters, lists and data apps with Array methods, DOM and Fetch API. All code is copy-ready.

Why this track

Why learn JavaScript with HtmlRunner?

◐

Run JS instantly

No setup. Every lesson has a live editor — change variables and see the result.

▣

Modern JS

We teach ES6, promises, fetch and localStorage — the skills jobs require.

◎

Private & free

No account. Your code never leaves your browser.

Jiyasrul Alom Juwel

Founder, HtmlRunner — building free tools for everyone. About the author →

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Curriculum

JavaScript curriculum

Follow in order or jump to any lesson. Every lesson has a live editor.

Phase 1: Getting Started 6 lessons

First 6 lessons

01Introduction→02Variables→03Operators→04Functions→05Conditions→06Loops→

Phase 2: Core Skills 6 lessons

Next 6 lessons

07Arrays→08Array Methods→09String Methods→

10Objects→11JSON→12DOM→

Phase 3: Advanced 6 lessons

Final 6 lessons

13Events→14Error Handling→15ES6+→16Promises→17Local Storage→18Fetch API→

Start Lesson 1 → Open Playground

FAQ

JavaScript FAQ

JavaScript makes pages interactive — buttons, forms, data. See Introduction.

Write code and see the result instantly — every lesson here has a live editor.

No — it runs in your browser. Node.js is for server use.

Here you run code live versus static examples. Try Variables.

Ready for more?

Explore other tracks or build in the Playground.

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