What is the ‘Readonly’ utility type and how does it differ from ‘Object.freeze()’ at runtime?

Question

TypeScript Professional — Medium

What is the ‘Readonly’ utility type and how does it differ from ‘Object.freeze()’ at runtime?

Accepted Answer

Readonly in TypeScript is a compile-time constraint that does not enforce immutability at runtime, while Object.freeze() in JavaScript prevents mutations at runtime but lacks TypeScript type awareness.