What is the ‘as const’ assertion in TypeScript and how does it benefit React component prop typing?

Question

React Developer — Hard

What is the ‘as const’ assertion in TypeScript and how does it benefit React component prop typing?

Accepted Answer

The 'as const' assertion in TypeScript converts a mutable array to an immutable tuple, allowing for stricter prop type definitions in React components by inferring literal types. This helps ensure more precise typing and prevents unintended prop value changes.