TypeScript · Senior · Question 45 of 75
Why is isolatedDeclarations (TS 5.5) useful for monorepos?
- ✓Correct answer: It allows generating
.d.tsper file and in parallel - 2It forbids importing types between monorepo packages
- 3It isolates each package in a separate Node.js process during builds
Explanation
The flag requires exported APIs to be explicitly annotated - then declarations can be produced by looking at a single file. This lets third-party tools (oxc, swc) generate .d.ts in parallel without waiting for a full check of dependencies.