TypeScript is a superset (or extension) of JavaScript, created after developers found new ways to improve the language. Today, TypeScript is one of the most popular programming languages used in web development.

What does TypeScript do?

As an extension of JavaScript, TypeScript can do almost everything JavaScript can — with added functionalities that make it easier to build bigger, more complex programs. For example, its type annotation feature helps you find bugs and errors, which is helpful when you're working with thousands of lines of code.

Is TypeScript a language?

Yes! Similar to how C++ and C# are programming languages based on C, <a href="https://www.codecademy.com/resources/blog/typescript-vs-javascript/">TypeScript is an upgrade to JavaScript</a> that adds helpful features that streamline development.

What kind of jobs use TypeScript?

Like JavaScript, TypeScript is a popular tool for Web Developers. Front-End Developers use it to add interactive features to web pages, and Back-End Developers can use it with frameworks like Node.js. It can also be helpful if you're considering a career in game or mobile development, or interested in virtual or augmented reality.

What else should I study if I am learning TypeScript?

TypeScript is a superset (or extension) of JavaScript, so learning JavaScript is the first step. If you want to learn how to build websites, you'll also want to learn HTML and CSS — along with frameworks like Vue and Angular. If you're more interested in back-end development, consider learning Node.js.

Free

Course

Learn TypeScript

Learn TypeScript, a superset of JavaScript that adds types to make the language scale!

This course includes

120,950 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

10 hours
Projects
7
Prerequisites
1 course

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

About this course

JavaScript is a powerful programming language. But as it continues to evolve, outdated code gets messy and difficult to maintain. That’s where TypeScript comes in. It builds on your JavaScript foundation so you can develop higher-quality, less error-prone code faster. As a TypeScript developer, you’ll be in higher demand and gain a competitive edge in the work world.

Syllabus

7 lessons • 7 projects • 7 quizzes

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Meet the full team

Kenny Lin

Web Development Domain Manager at Codecademy

Kenny is the Domain Manager for the Web Development Domain at Codecademy. He contributed to a wide range of courses and paths at Codecademy, including JavaScript, Bootstrap, Handlebars, Phaser.js, Go, Swift, TypeScript, and Lua.

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