Proper Way to Add Functions to Object Prototype?

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): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty - look at the bottom for browser compatibility. Either that, or use `hasOwnProperty` when iterating with the `for` loop: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty . Either those, or iterate through the result of `Object.keys(obj)`: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys — Ian, Oct 18 '13 at 04:02

score 0 · Accepted Answer · answered Jul 12 '14 at 19:01

0

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

answered Jul 12 '14 at 19:01

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Proper Way to Add Functions to Object Prototype?

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