Proper Way to Add Functions to Object Prototype? [duplicate]

Question

Is there a way to add a function to the Object Prototype in a way that it won't be included in a loop for?

Ex:

Object.prototype.stuff = function(){};
var obj = {'hello':1};
for(var i in obj){
    console.log(i);
}
//it will log: hello, stuff
//I'd want it to only log hello,

Use Object.defineProperty and set enumerable as false (which is the default): developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… - look at the bottom for browser compatibility. Either that, or use hasOwnProperty when iterating with the for loop: developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… . Either those, or iterate through the result of Object.keys(obj): developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Ian
– Ian, Commented Oct 18, 2013 at 4:02

RainingChain · Accepted Answer · 2014-07-12 19:01:13Z

0

Object.defineProperty(Object.prototype, "stuff", {
    enumerable: false,
    value: function(){
        //...
    }
});

answered Jul 12, 2014 at 19:01

RainingChain

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