tooling/typecheck-separately

Why

Vite, esbuild, Rolldown, Turbopack and SWC remove types without checking them, so a build succeeds with type errors and they reach production. Editors show errors only in open files.

Fix

Add a typecheck script and run it in CI next to lint and tests: tsc --noEmit (or tsc -b for project references), vue-tsc --noEmit for Vue, svelte-check for Svelte, astro check for Astro, ng build for Angular. On TypeScript 7 (the native compiler, no programmatic API yet), tools that call the TypeScript API, such as type-aware typescript-eslint rules, vue-tsc and svelte-check, may need the @typescript/typescript6 compatibility package; check their documentation.

Examples

{ "scripts": { "typecheck": "tsc --noEmit", "lint": "eslint .", "test": "vitest run" } }

Sources

• Vite, Features (TypeScript transpile only)
• TypeScript, TSConfig reference (noEmit)

Read it in the terminal

npx github:dawidolko/frontend-skills explain tooling/typecheck-separately