JavaScript create and assign a prototype object to another object

Question

I have:

// prototype object
var x = {
    name: "I am x"
};

// object that will get properties of prototype object
var y = {};

// assign the prototype of y from x
y.prototype = Object.create( x );

// check
console.log( y.__proto__ );

Result:

enter image description here

Why? What am I doing wrong?

prototype property will be honoured only for the function objects. Otherwise it is just another property. — thefourtheye
– thefourtheye, Commented Jul 4, 2015 at 19:19

dfsq · Accepted Answer · 2015-07-04 19:20:54Z

5

There is is not such special property as prototype for objects that would act like the one for functions. What you want is just Object.create( x );:

var x = {
    name: "I am x"
};

// object that will get properties of prototype object
var y = Object.create( x );

// check
console.log( y.__proto__ );

// verify prototype is x
console.log( Object.getPrototypeOf(y) === x ); // true

answered Jul 4, 2015 at 19:20

dfsq

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