JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a"></div>
<div id="b"></div>

JavaScript

var objA = {prpA:26};
var objB = objA;
document.getElementById('a').innerHTML = JSON.stringify(objB);

objA.prpA=30;
document.getElementById('b').innerHTML = JSON.stringify(objB);