TypeScript

Definition

TypeScript is a typed superset of JavaScript that adds static type checking at compile time. It compiles to plain JavaScript and can be used in any JavaScript project.

Simple Explanation

TypeScript is JavaScript with training wheels. You tell it what type each variable should be (string, number, array of User objects) and it catches mistakes before your code runs — like spell-checking while you type.

Real-World Use Case

A team of 10 developers works on a complex SaaS app. TypeScript catches type mismatches, missing properties, and incorrect function calls before they become production bugs.

Examples

Related Terms

Learn More

• typescriptlang.org
• TypeScript Handbook