How to set another object inside another object | JavaScript

Question

I don't know if this question's been answered yet but I'd still ask. Pretty confused over this one, and it might be simple but nonetheless, here goes:

I want to turn this already set object (meaning i have no access to it, just getting it from the server):

Object: { test1: 'test1', test2: 'test2', test3: 'test3' }

to (basically just add another object inside it):

Object: { test1: 'test1', test2: 'test2', test3: 'test3', test4: 'test4' }

Not sure if this was asked or answered before but if I can get an answer here to clarify this, it would be awesome.

score 1 · Accepted Answer · 2015-06-12 07:29:43Z

basically just add another object inside it

You're not adding an object inside it; you're adding a property.

There are several ways.

Object.defineProperty(myObject, 'test4', { value: 'test4 })

This will return the object, which could be handy.

Or, of course, just

myObject.test4 = 'test4'

You can use the "merge" or "extend" features in many libraries, which would be useful if adding more than one new property:

_.extend (myObject, { test4: 'test4' }) // Underscore $.extend (myObject, { test4: 'test4' }) // jQuery Ember.merge (myObject, { test4: 'test4' }) // Ember Object.assign(myObject, { test4: 'test4' }) // ES6

Right, of course just straight up define it as an object. funny I asked this because it wasn't working before on other projects but it worked here. Anyways, thanks :) I'll accept this answer as soon as it's possible.

Nielsen Martins Gonçalves · Accepted Answer · 2015-06-12 07:28:19Z

If you have an object like this:

people = { name: 'John Doe', age: 18 };

You can simply add one attribute to it this way:

people.hairColor = 'black';

Than your people object will be like:

people = { name: 'John Doe', age: 18, hairColor: 'black' };

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