JS Practice — Built-in Objects

Object.isFrozen() — deeply nested objects

📖 Usage Example

// Check if an object is frozen
const obj = { a: 1 }
Object.isFrozen(obj)    // → false
Object.freeze(obj)
Object.isFrozen(obj)    // → true

Use Object.isFrozen() to verify that an object is fully immutable (no additions, deletions, or value changes allowed).

Object.isFrozen() — shallow freeze only

Object.freeze() is a shallow operation. Nested objects are not frozen automatically.

Challenge: Demonstrate that freezing an object does not freeze its nested objects.

💡 Hints (1)