typescript-core

A strict tsconfig prevents TypeScript errors by enabling flags like noUncheckedIndexedAccess, exactOptionalPropertyTypes, verbatimModuleSyntax, and isolatedModules to enforce type correctness and module safety.

The best way to validate external API payloads in TypeScript is pairing boundary parsing libraries like Zod, TypeBox, or Valibot with the satisfies operator to ensure runtime validation aligns with compile-time types.

The satisfies operator improves TypeScript type safety by verifying an expression matches a type while preserving the narrowest inferred type, preventing incorrect states without losing literal type information for downstream operations.

Yes, you can use discriminated unions and template literal types together for safer TypeScript routing by enforcing exhaustive type narrowing and generating literal route paths to prevent invalid API states.

verbatimModuleSyntax requires type-only imports in TypeScript because it enforces that types are explicitly marked with the import type syntax, preventing runtime import errors and ensuring isolatedModules compatibility.

You narrow types error-proof without using any in TypeScript by applying discriminated unions, const type parameters, and safer narrowing strategies to achieve precise type narrowing and eliminate unsafe type assertions.