[oopinjs] The [[Prototype]] Property, assign a value to a prototype property

[michail]

Hi,

at the end of the "The [[Prototype]] Property", you say

"This example also highlights an important concept: You cannot assign a value to a prototype property from an instance. ”

Excerpt From: Nicholas C. Zakas. “The Principles of Object-Oriented Javascript.” iBooks. 

 

But actually you can do object.__proto__.toString = function() { return '[object Custom2]'; },  object.__proto__.prop1 = 10, or object.__proto__.f1 = function() { return 10; }

Is it something which I am missing or you have some something else in mind?

[Nicholas Zakas]

Hi Michail,

What you're describing is not assigning a value to a prototype property through the instance. Instead, you are using the instance to get a reference to the prototype object and then modifying the property directly on the prototype. It's the same as using Object.getPrototypeOf() to retrieve the prototype and then modify it directly.

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______________________________
Nicholas C. Zakas
@slicknet

Author, Principles of Object-Oriented JavaScript

Author, Understanding ECMAScript 6

[Mihail Stefanov]

Hi Nicholas,

In that case you are right, there is no way to manipulate  prototype.

By the way really good book!

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