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javascriptprototypeprototype-chain
O. Shekriladze
O. Shekriladze

Reputation: 1536

__proto__ inside JavaScript function prototype property

Imagine simple function:

function Person();

I know that Person has __proto__ property that references to Function.prototype.

I also know that Person has prototype property. When I write: function Person() {}, a new prototype object is automatically created:

Person.prototype = { constructor: Person };

but inside Person.prototype block, I also have __proto__, so what is this __proto__, when is it created, who creates it?

I may know that it's Object's prototype but is it always so?

Upvotes: 0

Views: 63

Answers (1)

Kuba Michalski
Kuba Michalski

Reputation: 70

I'm not sure if I understand what you mean, but prototypes have their prototypes which can have their prototypes which can have their prototypes and so on until null. Based on your question you may know it's called prototype chain, if not now you know :) You can read in more detail about it on Mozilla docs.

Upvotes: 1

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