Strict TypeScript settings turn annotations into stronger feedback

TypeScript annotations provide limited assurance when permissive compiler options silently admit unknown or unchecked values.

The any type disables further checking, while inference can default to any when context is insufficient.

TypeScript recommends noImplicitAny, and the strict family enables stronger correctness guarantees across several checks.

Migration remains gradual through allowJs, so teams can adopt checking before converting every file.

Incremental compatibility lets teams adopt checking without converting every JavaScript file immediately.

Structural typing preserves familiar object patterns while stricter options reject risky assignments.

Those strengths become reliable only when CI pins configuration, checks all intended files, and blocks regressions.

Choose strictness deliberately, measure excluded code, and treat every suppression as an explicit reduction in evidence.