javascript - check if object is empty [duplicate]

Question

I am trying to create to javascript/jquery test to check if my object is empty and cannot figure it out.

Here is the object when it has something in it:

{"mergedSellerArray":{"key1114":"1120"}} 

And here is the object when empty:

{"mergedSellerArray":{}} 

This is the current test I have based on another SO answer but it does not work:

var sellers = JSON.stringify({mergedSellerArray}); if(Object.keys(sellers).length === 0 && sellers.constructor === Object) {     console.log("sellers is empty!"); } 

Answer 1

You were testing sellers which is not empty because it contains mergedSellerArray. You need to test sellers.mergedSellerArray

let sellers = {    "mergedSellerArray": {}  };  if (Object.keys(sellers.mergedSellerArray).length === 0 && sellers.mergedSellerArray.constructor === Object) {    console.log("sellers is empty!");  } else {    console.log("sellers is not empty !");  }