TypeScript›Type Guards›satisfies
←Number.isNaN

satisfiesType Guards

as const→

Validates that an expression matches some type while keeping the inferred type. (TS 4.9+)

Syntax

value satisfies Type

Example

Enter values below to update the example in real time.

const→
palette→
red→
green→
satisfies→
Record→
string→
const palette = {
  red: [255, 0, 0],
  green: "#00ff00",
} satisfies Record<string, string | number[]>;