TypeScript 7 Beta dan tsgo: migrasi compiler harus diuji bertahap
Dampaknya besar untuk CI dan editor, tetapi risiko tetap ada pada JSDoc lama, watch mode, LSP, declaration emit, dan tool internal yang memakai TypeScript API.
What happened
Microsoft announced TypeScript 7.0 Beta on April 21, 2026. The beta is available as @typescript/native-preview@beta and runs through tsgo, so teams can compare it with TypeScript 6 tsc before changing their default toolchain.
Why it matters
TypeScript 7.0 Beta membawa compiler native berbasis Go. Tim sebaiknya menjalankan tsgo berdampingan dengan tsc sebelum mengganti default. This is especially relevant for large TypeScript codebases, monorepos, and teams where type-checking latency affects pull-request flow and editor responsiveness.
Checklist praktis
Catat baseline tsc, tambah tsgo sebagai job non-blocking, bandingkan error dan .d.ts, uji ekstensi VS Code pada sebagian developer, lalu tetapkan kriteria promosi.
Risks
The official repository still marks the programmatic API as not ready, watch mode as prototype, and LSP work as in progress. Teams with legacy JavaScript, CommonJS, Closure-style JSDoc, or compiler-API tooling should validate those areas separately.