Practice real frameworks

Hands-on TypeScript exercises that mirror real engineering work — from core fundamentals to the patterns interviewers actually probe. Every challenge is graded automatically and mapped to a skill below.

TypeScript is a statically typed superset of JavaScript developed by Microsoft. It adds optional static types, classes, and interfaces to JavaScript, enabling developers to catch errors at compile time. TypeScript code is transpiled to standard JavaScript, ensuring compatibility with existing JavaScript environments. It supports modern JavaScript features and integrates with popular frameworks like React and Angular.