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The `satisfies` operator validates types without widening literals. Use it to preserve autocomplete while ensuring compile-time compatibility, but remember it provides no runtime safety.
Use TypeScript satisfies to validate object literals against a type while preserving exact literal property types for autocompletion.
TypeScript's `satisfies` operator checks that an object matches a target type while preserving narrow literal inference. Here is how to use it for route tables and config objects, and where it falls short.
Learn how TypeScript’s satisfies operator validates object shapes while keeping literal types intact, preventing excess‑property bugs and enabling precise mapped types.
Type annotations validate your config objects but widen away their literal types. TypeScript 4.9's satisfies operator gives you real compile-time validation while keeping narrow inferred types.
typescript