JS Built-ins
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ObjectObject.getPrototypeOfbeginner

Object.getPrototypeOf() — array 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() — arrays

Arrays are instances of Array, so their prototype is Array.prototype, not Object.prototype directly.

Challenge: Implement arrayProtoIsArrayProto() that returns whether the prototype of [] is Array.prototype.

arrayProtoIsArrayProto() // → true
💡 Hints (1)
  • • Arrays are instances of `Array`, whose prototype chain is `[] → Array.prototype → Object.prototype → null`.