TypeScript 7.0 reaches release candidate with the native Go compiler

Category: Languages
Status: confirmed
Sources: TypeScript blog, discussion
Summary: Microsoft published the TypeScript 7.0 release candidate on 2026-06-18. 7.0 is the compiler rewritten from the bootstrapped TypeScript codebase to Go, and the team reports it is often about 10 times faster than 6.0. Install is npm install -D typescript@rc; a stable release is planned within a month, with stable programmatic APIs arriving in 7.1 several months later. Breaking changes include rootDir defaulting to ./ instead of inference, types defaulting to [] instead of auto-loading @types packages, and removal of target es5 plus the node/node10 module resolution modes.
Why it matters: The native compiler cuts type-checking and build times across the JavaScript ecosystem, and the changed config defaults create migration work for existing projects.
Follow-up: Watch for the 7.0 stable release within a month and the 7.1 stable programmatic API.