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Learn JavaScript

Learn JavaScript by writing real code with functions, objects, arrays, promises, async/await, modules, and the event loop.

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What you'll learn in this JavaScript course

Learn modern JavaScript by writing real code in this comprehensive interactive course. You'll solve challenges that build from variables, functions, and objects to promises, async/await, modules, runtimes, and the event loop.

Chapter List

1
Variables
Learn the basic syntax of JavaScript and how to declare variables
2
Comparisons
Learn how to compare values and write conditional statements
3
Functions
Learn about the different ways to create and execute functions in JavaScript
4
Objects
Objects are one of the most-used JS structures, learn to master them
5
Classes
Learn about classes in JavaScript and how they differ from POJOs and the classes in other languages
6
Prototypes
Explore JavaScript prototypes and how they enable inheritance without traditional classes.
7
Loops
Understand and practice the many ways to iterate over a list of data
8
Arrays
Learn about contiguous memory storage in JavaScript
9
Errors
Practice good error handling with JavaScripts try/catch
10
Sets
Practice using the new ES6 (ES2015) set object for collections of unique values
11
Maps
Learn about the new ES6 map object for collections of key-value pairs
12
Promises
Understand promises and asynchronous programming in JavaScript, as well as the new async/await syntax
13
The Event Loop
Grok one of the most important elusive concepts beknownst to JavaScript developers, the asynchronous event loop
14
Runtimes
Learn about the different JavaScript runtimes and how they differ
15
Modules
ES6 Modules help us organize our code into separate files. Learn how to use them and how they differ from CommonJS.
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Join 50,811 students in the Learn JavaScript course

Read reviews of their learning experiences

Very imformative! I hated javascript and now I know why. It's confusing if you don't understand some of the inner workings. Also there's just a bunch of confusing features but still good course!!!

(5/5)
Ben Nicholls profile image

Ben Nicholls

United States

This is one of the best JS courses that I have been able to actualy finish, insted of droping in the mid learning process.

(4/5)
Thenuja profile image

Thenuja

Galle, Sri Lanka

I learned much valuable JS from this course. I hope the course continues to grow to cover additional important JS topics.

(4/5)
Chris Wineinger profile image

Chris Wineinger

California, United States

This is better suited as a supplement building on a basic understanding of JS. As someone already familiar with JS, it is fantastic at teaching the deeper concepts under the hood though this is best approached not as a complete beginner to JS.

(4/5)
G-Junction profile image

G-Junction

United States

Great course that teaches you basically everything there is to know about JS!

(3/5)
Martin Hagelin profile image

Martin Hagelin

Sweden

Pretty good overall

(3/5)
Dean Hasto profile image

Dean Hasto

United States

Good to get the basics on how to write beginner code. But I did not feel with enough tools to make functional project

(3/5)
Juan-Diego Ospina profile image

Juan-Diego Ospina

United States

awesome course, especially last 2 chapters are crazy good!

(5/5)
Ahmed Mkacher profile image

Ahmed Mkacher

Tunisia

As always, an excellent and didactic introduction to complicated matters, only leaving a wish to see more !

(5/5)
Maxime Pellet profile image

Maxime Pellet

France

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Mediocrity doesn't cut it anymore

The only way to become a great developer is to write a lot of code

Avoid tutorial hell

by writing a ton of code

Stay motivated with

a game-like curriculum

Build portfolio projects

to prove your skills

Delve deeper

into foundational concepts

Learn flexibly online

without interrupting your life

For 1% the price of college

to minimize your financial risk

Frequently asked Questions

Got questions? We've got answers

Yes, but we assume you're already familiar with programming basics like variables, conditionals, and functions. You don't need any prior JavaScript experience.

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