JSFiddle - React, Tailwind, and code Playground

HTML

<div class='result'>
</div>

JavaScript

var jsonObj = {
 "elements" : []
};
$('.result').append( "<p>" + jsonObj.elements +"</p>");
jsonObj.elements.push(1);
$('.result').append( "<p>" + jsonObj.elements +"</p>")
jsonObj.elements.push('a');
$('.result').append( "<p>" + jsonObj.elements +"</p>")