JS Practice — Built-in Objects

Object.getPrototypeOf() — plain object prototype

📖 Usage Example

// Get the prototype of an object
const arr = []
Object.getPrototypeOf(arr) === Array.prototype   // → true
Object.getPrototypeOf({}) === Object.prototype   // → true

Use Object.getPrototypeOf() to retrieve the prototype of an object, allowing you to inspect its inheritance chain.

Object.getPrototypeOf()

Object.getPrototypeOf(obj) returns the prototype of obj. For plain objects created with {} or new Object(), the prototype is Object.prototype.

Challenge: Implement plainProtoIsObjectProto() that creates {} and returns whether its prototype is Object.prototype.

plainProtoIsObjectProto() // → true

💡 Hints (1)

• `Object.getPrototypeOf({})` returns `Object.prototype` — the root of most prototype chains.