Check if object inside an object is empty with javascript [duplicate]

Question

Hello I have an object:

var equippedItems = {
weapon: {},
armor: {},
accessory: {}
};

I need a way to check if equippedItems.weapon equals to '' at some point I am doing something like equippedItems.weapon = ''; I dont know if it's exactly the same as above object. I already tried using object.hasOwnProperty but it seems I cannot use equippedItems.weapon in this case, maybe I am doing something wrong? Also note I did read how to check if object is empty already, but it didn't work for my object inside an object.

@Edit:

Like I said, I already read those and they did not give me a straight answer for my question, they did answer how to check if object is empty, but the object was like object = {}; while mine is like object = { object:{}, object2:{}, object3:{}};

Thats why it confuses me.

Answer 1

Just make use of Object.keys

function isEmpty(obj, propName){
   return Object.keys(obj[propName]).length == 0;
}

Another way is to make use of JSON.stringify method which will return {} if empty

function isEmpty(obj, propName){
   return JSON.stringify(obj[propName]) == "{}";
}

In both the cases, you would call the function like

if(isEmpty(equipmentItems.weapons)){
   equipmentItems.weapons = "";
}