Calling functions in Object.Prototype from Object

Question

I added a function to Object.prototype using Object.prototype.func = function () {...} but when I try to call it using Object.func() it throws an error that it is not defined in Object.

You're testing this improperly, because that should work fine. — Pointy
– Pointy, Commented Aug 19, 2012 at 14:15

Adam Jenkins · Accepted Answer · 2012-08-19 14:18:39Z

2

Everything in JavaScript is an object and inherits from Object (including Object). If there's a property on Object.prototype then EVERYTHING can access it because it is in everything's prototype.

http://jsfiddle.net/PxLDu/1/

answered Aug 19, 2012 at 14:18

Adam Jenkins

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3 Comments

Esailija Over a year ago

Note that the primitives weren't objects, but were silently converted to a new object to call the method and the object was then discarded

geeko Over a year ago

@Adam does this include Object() itself? I want to do Object.func()

Esailija Over a year ago

@geeko the jsfiddle has Object.func() right there at the end, you are doing something differently. Also see jsfiddle.net/9WjBr

Mike Rossi · Accepted Answer · 2012-08-19 14:19:39Z

1

Seems to be working fine for me (from node REPL):

Object.prototype.something = function() { console.log("Something!"); }
[Function]
> b = new Ob
Object  

Object  

> b = new Object()
{}
> b.something()
Something!

answered Aug 19, 2012 at 14:19

Mike Rossi

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2 Comments

geeko Over a year ago

you are creating a new object using Object() but I'm trying to call my func from within Object() itself like Object.func() but it is not working

Mike Rossi Over a year ago

You mean like this: > Object.prototype.someFunc = function() { console.log("some function"); } > Object.someFunc(); > some function. Again, this works just fine.

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