TypeScript is a strongly typed programming language developed and maintained by Microsoft. It builds on JavaScript by adding static type definitions, allowing developers to catch errors at compile time and write more maintainable code.
TypeScript code transpiles to plain JavaScript and can run anywhere JavaScript runs: browsers, Node.js, Deno, Bun. Its sophisticated type system supports generics, conditional types, mapped types, and template literal types — letting developers express precise contracts that scale to massive codebases.
JavaScript with syntax for types. Catches errors at compile time, scales codebases to millions of lines.
✨ Features
Types verified at compile time. Catch null bugs, typos, contract violations before runtime.
Reusable, type-safe abstractions. Collection<T>, Result<T, E>, Awaited<T> — express precisely.
Type-level if/else. Build advanced types like ReturnType, Parameters, Awaited from primitives.
Most code needs no annotations. Compiler infers types from usage with remarkable precision.
IDE autocomplete, refactoring, jump-to-def. The reason TypeScript adoption keeps growing.
