JavaScript is a client-side scripting language. It's flexible and versatile, working well with other languages and offering a wide array of libraries and frameworks that streamline development and make it easier to get a project off the ground.

What does JavaScript do?

JavaScript is mainly used for web development, but it can also be used for game and mobile development, virtual reality, and artificial intelligence.

What kind of jobs can JavaScript get me?

Learning JavaScript can put you on the path to a career as a Web Developer, Game Developer, Android Developer, or iOS Developer.

What else should I study if I am learning JavaScript?

If you're looking to build websites, you'll also want to learn HTML and CSS, along with JavaScript libraries like React, Angular, and Node.js. If you want to start building video games, try Phaser.js — and if you prefer mobile development, check out React Native.

Free

Course

Learn Intermediate JavaScript

Take your JavaScript knowledge to the next level by learning how to use advanced functions to create more efficient programs.

This course includes

104,894 learners enrolled

This course includes

Skill level
Intermediate
Time to complete
Average based on combined completion rates — individual pacing in lessons, projects, and quizzes may vary

11 hours
Projects
5
Prerequisites
1 course

We suggest you complete the following courses before you get started with Learn Intermediate JavaScript:
Learn JavaScript

About this course

Build on your JavaScript foundation with Intermediate JavaScript. This course dives into advanced concepts like classes, promises, async/await, and requests. You’ll learn how to create more dynamic and efficient web applications while mastering essential techniques for structuring and optimizing large-scale projects.

Skills you'll gain

Understanding currying, hoisting, and concurrency
Structuring web apps with classes and modules
Using promises and async/await for asynchronous programming
Managing efficient web app requests

Syllabus

6 lessons • 5 projects • 6 quizzes

Certificate of completion available with Plus or Pro
Earn a certificate of completion and showcase your accomplishment on your resume or LinkedIn.

The platform

Hands-on learning

Animated GIF of an AI provided error explanation within Codecademy's learning environment

An AI-generated hint within the instructions of a Codecademy project

Animated GIF of Codecademy's Job Readiness Checker tool generating a compatibility report for a senior software engineer role

Animated GIF of building a phone screen interview using Codecademy's Interview Simulator

A fill-in-the-blank JavaScript question in a Codecademy assessment

Explore features

Projects in this course

Meet the creator of the course

Meet the full team

Jiwon Shin

Senior Curriculum Developer at Codecademy

Jiwon is a Senior Curriculum Developer at Codecademy. She has created courses across the web development catalog on languages such as JavaScript, PHP, and CSS, frameworks like React and Node.js, and the Front-End Engineer Career Path. She also created courses on p5.js, build tools, and Intro to UI and UX Design.

Meet the full team

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