JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
JavaScript
$(document).ready(function(){
var obj={"mergedSellerArray":{}};
alert("is empty: "+$.isEmptyObject(obj.mergedSellerArray));
var obj2={"mergedSellerArray":{"key1114":"1120"}};
alert("is empty: "+$.isEmptyObject(obj2.mergedSellerArray));
})