# JavaScript vs. TypeScript: What's the Difference?

DevFeed: [JavaScript vs. TypeScript: What's the Difference?](<https://devfeed.tech/articles/javascript-vs-typescript-what-s-the-difference-23035.md>)

Original publisher: [Read original article](<https://blog.teamtreehouse.com/javascript-vs-typescript-whats-the-difference>)

Author: Dev Support

Published: 2026-08-18T17:48:43Z

Content type: comparison

Language: en

Sources: [Treehouse Blog](<https://devfeed.tech/sources/treehouse-blog.md>)

Topics: [JavaScript](<https://devfeed.tech/topics/javascript.md>), [TypeScript](<https://devfeed.tech/topics/typescript.md>)

Tags: [javascript](<https://devfeed.tech/tags/javascript.md>), [learn](<https://devfeed.tech/tags/learn.md>), [typescript](<https://devfeed.tech/tags/typescript.md>)

## AI overview

A comparison of JavaScript and TypeScript explains that TypeScript is a superset of JavaScript with an optional type system. It covers static typing, earlier error detection, and TypeScript's compile step for browsers and Node.js.

## Source excerpt

Unlike the Java-vs-JavaScript mix-up (two totally unrelated languages that just happen to share a name), JavaScript and TypeScript really are related -- closely. TypeScript isn't a competitor to JavaScript. It's built directly on top of it. That relationship is exactly... The post JavaScript vs. TypeScript: What's the Difference? appeared first on Treehouse Blog.