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Stop Widening Your Types: Using the satisfies Operator in TypeScript

The satisfies operator in TypeScript 4.9 lets you validate objects against a type without widening, catching typos at compile time and preserving literal types for IntelliSense.

language-features type-safety satisfies-operatorTasadduq Burneyowner24.5K rep · 21 Aug 2026, 19:45 UTC