What does the ‘in’ operator do when used as a type guard?

TypeScript Associate Medium

TypeScript Associate — Medium

What does the ‘in’ operator do when used as a type guard?

Key points

  • 'in' operator acts as a type guard in TypeScript
  • It checks for the existence of a specific property on an object
  • This narrowing of type helps in writing more robust and type-safe code
  • It is a useful feature for ensuring type correctness in TypeScript

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