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Learn JavaScript

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

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.

Join 52,068 students in the Learn JavaScript course

Read reviews of their learning experiences

the highlighting is sometimes wrong

(4/5)
Benedikt Kaientz profile image

Benedikt Kaientz

Rostock, Germany

great for fundamentals

(5/5)
Dhruv  profile image

Dhruv

Australia

very good lessons!

(5/5)
Khaled Hassan profile image

Khaled Hassan

Cairo, Egypt

Nice that the related front/back-end tech is kept to a minimum and the focus is on the language itself.

(4/5)
Daniel Brown profile image

Daniel Brown

United States

Perfect interactive course

(5/5)
Mohamed Ahmed profile image

Mohamed Ahmed

Egypt

Really informative introduction.

(5/5)
Edward Childs profile image

Edward Childs

Corinth, VT

A fun intro to js for those with a familiarity of another programming language!

(4/5)
Andrew Wright profile image

Andrew Wright

Charleston, SC

great overview to learn if you are new like me, don't know the JS at all, but this lesson will give a glimpse of it.

(5/5)
Asim Ray profile image

Asim Ray

India

Nice lesson

(5/5)
Justin Sepvian profile image

Justin Sepvian

Indonesia

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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.