typescript-guardian

Strict mode enforcement ensures your tsconfig.json enables strict compiler options like strict, noImplicitAny, strictNullChecks, noUncheckedIndexedAccess, and strictFunctionTypes. This prevents unsafe type usage and catches type errors at compile time rather than runtime.

Replacing any with unknown or specific types restores type safety by forcing explicit type narrowing and validation. Unknown requires runtime checks before use, while specific types provide compile-time guarantees and better IDE support and refactoring safety.

Add explicit return type annotations by declaring the type after the function signature: `function getName(): string { }`. This documents expected behavior, catches type mismatches early, and makes code more maintainable and self-documenting.

Yes, enabling strict mode on existing code exposes violations incrementally. Address them by replacing any types, adding return annotations, implementing type guards for index access, and using type predicates to narrow unions—often one file or module at a time.

Enable noUncheckedIndexedAccess in tsconfig.json to flag unsafe lookups, then implement type guards and predicates to validate keys before access. This ensures index operations return the correct type union or undefined, preventing silent undefined errors.

No; you can migrate incrementally by enabling strict flags, identifying violations through type checking and linting, then prioritizing high-risk files. Type narrowing through guards and predicates can often fix violations without large refactors.