TypeScript
JavaScript with type checking added. It catches many mistakes before code runs, and it is the default language of professional web teams.
What it tells you about a developer
TypeScript depth signals current professional web practice and a habit of building for correctness. Candidates who choose it for personal projects, where nobody required it, are showing how they work on a team.
- Type
- Language
- Released
- 2012
- Built by
- Microsoft
- Used in
- FrontendBackend
TypeScript turns into JavaScript before it runs, so every TypeScript developer is a JavaScript developer. Teams adopted it because the checker catches errors early and makes a large codebase readable to someone new. Most serious web products built since about 2020 are written in it.