Prototype & Prototypal Inheritance

What will be logged to the console?

const proto = {
  getValue() { return this.value; }
};

const obj = Object.create(proto);
obj.value = 42;

console.log(proto.isPrototypeOf(obj));
console.log(Object.prototype.isPrototypeOf(obj));

false, false
true, false
false, true
true, true
The console will log true, true because: 1) proto.isPrototypeOf(obj) returns true since obj was created with proto as its direct prototype, 2) Object.prototype.isPrototypeOf(obj) also returns true because Object.prototype is in obj's prototype chain via proto's chain, 3) isPrototypeOf() checks the entire prototype chain, not just the direct prototype, 4) All JavaScript objects ultimately inherit from Object.prototype, unless explicitly set otherwise, 5) This demonstrates multi-level inheritance through the prototype chain, 6) Understanding this chain is crucial for properly checking inheritance relationships in JavaScript.

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