JS Practice — Built-in Objects

Advanced — deepFreeze

📖 Usage Example

const obj = deepFreeze({ a: { b: 1 } })
Object.isFrozen(obj)     // → true
Object.isFrozen(obj.a)   // → true

deepFreeze recursively calls Object.freeze on every nested object to prevent mutation.

Advanced Patterns: deepFreeze

Challenge: Implement deepFreeze<T extends object>(obj: T): Readonly<T> that recursively freezes an object and all its nested objects.

const obj = deepFreeze({ a: { b: 1 } })
Object.isFrozen(obj.a)  // → true

💡 Hints (1)