#1 Interactive JS Course

Learn JavaScript
By Building

Stop watching tutorials. Start writing code. Master JavaScript through 100+ interactive challenges.

45+

Lessons

100+

Exercises

10K+

Students

4.9★

Rating

solution.js
function greet(name) {
return `Hello, ${name}!`;
}
greet("World");
Output
"Hello, World!"

Excellent!

All tests passed

GAMIFIED LEARNING

Stay motivated every day

Our streak system and badges keep you engaged. Watch your progress grow and celebrate every milestone.

Daily Streaks

Build consistency with streak rewards

Progress Tracking

See exactly where you are in each module

Achievement Badges

Earn badges as you master new concepts

Welcome back

Alex 👋

7 day streak!

This Week

M
T
W
T
F
S
S

24

Lessons

7

Streak

68%

Progress

Intermediate JavaScript

7 of 10 lessons

70%

Recent Badges

🎯
📦
🔄
+5
HOW IT WORKS

Four steps to mastery

01

Read

Clear explanations

02

Code

Interactive editor

03

Run

Instant feedback

04

Level Up

Next challenge

FEATURES

Why developers choose us

Built for the way you actually learn to code

Interactive Editor

Write and run JavaScript code directly in your browser with instant results.

Smart Validation

Multiple solutions accepted. Our system understands different approaches.

Instant Feedback

Clear error messages and helpful hints guide your learning journey.

Structured Path

From basics to advanced. Each lesson builds on previous knowledge.

LEARNING EXPERIENCE

A modern way to learn

Our platform combines theory with practice in a beautiful, distraction-free environment

Lesson 3
Chapter 2

Working with Variables

Variables store data values. Use let to declare:

let message = "Hello";

💡 Create a variable name with your name.

script.js
1let name = "Alex";
2
Test Passed!
1/1
TESTIMONIALS

Loved by developers

Join thousands who transformed their careers

LearnTheJS took me from zero to landing my dream job. The interactive approach made complex concepts click.

AT

Alex Thompson

Frontend Dev @ Google

Finally, a platform that lets me code my way. The flexibility to solve problems differently is amazing.

SC

Sarah Chen

Engineer @ Meta

I tried many platforms. LearnTheJS is the only one that kept me engaged. Perfectly paced lessons.

MR

Mike Rodriguez

Full Stack @ Stripe

Join 10,000+ developers

Ready to become a
JavaScript expert?

Start your journey today. No credit card required.

Free forever
No credit card
Instant access