Hello guys, tell me what is difference between _proto_ and [[PROTOTYPE]], don't confuse with .prototype

Question

Let b = {}
b._proto_ === Object.prototype
b.[[PROTOTYPE]] === Object.prototype
Is it the same?

Answer 1

yes; __proto__ (double dunder as prefix and postfix) is same as [[prototype]]

they are internal property of object..
the former is deprecated (in favor of getPrototypeOf() method), even if still often supported for ascending compatibility ;)
the later is a notation used in books/documentations and has no use in code

https://developer.mozilla.org/en-US/docs/Web/JavaScript/The_performance_hazards_of_prototype_mutation

Answer 2

Object.getPrototypeOf(b) -> Object.prototype

Answer 3

Тимур Завьялов look at this schema, hopefully it will help you to understand
https://code.sololearn.com/W79SrO1dgHFr/?ref=app

Answer 4

Artur, basically, I got it

Answer 5

Тимур Завьялов I wrote down js code in there. May be it will help you as well. Good luck 🤗

Answer 6

visph, and what will it look like with getPrototypeOf?

Answer 7

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getPrototypeOf

Answer 8

visph, thanks)

Answer 9

Artur, thanks)