KITFORMA · EDITORIAL ANSWER
How does satisfies validate configuration without widening every literal?
KitForma editorial guide. On TypeScript 4.9+, use const config = {...} satisfies Config to check compatibility while retaining useful inferred detail.
Step-by-step answer
On TypeScript 4.9+, use
const config = {...} satisfies Config to check compatibility while retaining useful inferred detail. It does not cast unknown network data or freeze the object. Verify an invalid key causes an error and intended property operations remain available. Use runtime validation for external configuration.Sources and verification
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