__proto__ is the actual object that is used in the lookup chain to resolve methods, etc.
prototype is the object that is used to build
__proto__ when you create an object with
( new Foo ).__proto__ === Foo.prototype; ( new Foo ).prototype === undefined;
What we will learn here will help us understand Object-oriented programming(OOP).
It’s hard to skip prototypes (or the prototype chain or prototypal inheritance) if you want to dive deeper into JS development (Not only pure JS, but also Node.js, Frameworks like Vue.js, React.js, Angular,…).
From the MDN documentation (don’t be scared, we’ll clarify everything below):
Refer back to the below illustration whenever you feel the need, it might help you to wrap your head around this concept easier.
[[Prototype]] prototype, which holds a reference to another object (or
null). This means, that our new object will have access to methods and properties of that referenced object.
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