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TypeScript 6.0

TypeScript 6.0

The last TypeScript release built on JavaScript

Website typescriptlang.org
Overview

What it is

The site for learning the TypeScript programming language got a big update with a fresh lick of paint, new documentation tools to help you understand how things work and a shiny new logo.

Intent

I need it when

Improve code editor support and developer experience with autocomplete and documentation

TypeScript enables rich editor integration with auto-complete, inline documentation, and intelligent refactoring by understanding the shape of objects and function signatures through type annotations

Catch type errors early in development before code runs

TypeScript provides static type checking that runs before code execution, catching errors like incorrect property access, wrong function arguments, and type mismatches in the editor, preventing runtime crashes

Write code that runs anywhere JavaScript runs with type safety

TypeScript compiles to standard JavaScript that executes in browsers, Node.js, Deno, Bun, and other JavaScript runtimes, providing type safety during development while maintaining universal JavaScript compatibility

Gradually migrate existing JavaScript projects to a typed codebase

TypeScript supports incremental adoption through JSDoc type checking and per-file opt-in, allowing developers to add types to JavaScript projects one file at a time without rewriting everything

Build large-scale applications with better code maintainability and safety

TypeScript provides type safety at scale by catching errors early, enabling better tooling for large codebases, and making code intent explicit through type declarations, reducing bugs and improving team collaboration

Drop

Not a fit when

  • When you need a language that runs natively without compilation; TypeScript must be compiled to JavaScript first
  • When working in environments that do not support JavaScript runtime (e.g., embedded systems, low-level hardware programming)
  • When you require a language with built-in static typing at runtime; TypeScript types are stripped during compilation
  • When you need a language without any learning curve for JavaScript developers; TypeScript adds type syntax and concepts to learn
  • When your project cannot use npm, Node.js, or package managers; TypeScript distribution requires these tools
Commercials

Pricing

Free, open-source programming language