JS Practice — Built-in Objects

Object.getOwnPropertyDescriptors() — clone with Object.create

📖 Usage Example

// Inspect all property descriptors at once
const obj = { a: 1, b: 2 }
Object.getOwnPropertyDescriptors(obj)
// → { a: { value: 1, writable: true, ... }, b: { value: 2, ... } }

Use Object.getOwnPropertyDescriptors() to get all property descriptors of an object, useful when doing a complete clone.

Object.getOwnPropertyDescriptors() for cloning

Object.create(proto, Object.getOwnPropertyDescriptors(source)) creates a precise clone preserving all descriptors.

Challenge: Implement preciseClone(obj) that uses Object.create and Object.getOwnPropertyDescriptors to clone obj.

preciseClone({ a: 1 }) // → { a: 1 }

💡 Hints (2)

• `Object.create(proto, descriptors)` sets both the prototype and all property descriptors at once.
• This technique clones getters, non-writable, non-enumerable properties — unlike `Object.assign`.