Programming language · Programming

TypeScript

Large JavaScript codebases are now mostly written in TypeScript, which adds type annotations that a compiler checks and then strips away before the code runs. Front-end and Node.js teams adopt it to catch mistakes in the editor rather than in production. Newcomers often expect the types to protect them at runtime; they do not, so data arriving from outside still needs validating.

Maker's site: www.typescriptlang.org (opens in a new tab) (no commission).