typescript-expert

Enable skipLibCheck and incremental compilation in tsconfig, then run tsc --extendedDiagnostics to identify bottlenecks. For monorepos, configure project references with composite: true, and split large union types or deep recursive types that cause excessive instantiation.

This error comes from deeply recursive or circular generic types. Limit recursion depth with counter-based conditional types, replace type intersections with interfaces, and break large unions into smaller groups to stay within compiler limits.

Choose Biome when speed matters and you want a single tool for linting and formatting in a TypeScript-first project. Stay with ESLint when you need type-aware linting rules, custom plugins, or framework support for Vue and Angular.

Module resolution failures usually come from mismatched moduleResolution settings, misaligned baseUrl and paths, or stale build caches. Check that moduleResolution matches your bundler, verify workspace protocol usage in monorepos, and clear .tsbuildinfo caches.

Use branded types for critical domain primitives like UserId, OrderId, or currency values where mixing plain strings or numbers causes bugs. They create nominal typing at compile time with zero runtime cost, preventing accidental argument swaps.

Enable allowJs and checkJs in tsconfig, then rename files from .js to .ts gradually while adding types file by file. Enable strict mode flags one at a time, and use tools like ts-migrate or typesync to automate parts of the conversion.