JavaScriptTypeScriptRust Bun CLI DevelopmentWeb DevelopmentFrontend Development 1 min read

Bun Adds Built-in TypeScript Type Checker With New Check Command

The JavaScript runtime is introducing a native Rust-based type checker, allowing developers to validate TypeScript codebases without external dependencies.

Bun is adding a built-in TypeScript type checker to its runtime.

The upcoming version introduces the bun check command for type verification inside the environment. Written in Rust, the feature integrates type checking directly into the standard workflow.

By making this a native component, the project removes the need for external tools when validating TypeScript codebases. You can run type analysis without separate installations or extra configuration steps.

The software functions as an all-in-one JavaScript runtime, bundler, and package manager.

More details on performance and configuration options will arrive with the next version.