JSFiddle - React, Tailwind, and code Playground

HTML

<span id="text1"></span>
<br />
<span id="text2"></span>

JavaScript

var yourObject = [{"name":"Whats up","error":"Your name required!"}];

var firstElement = yourObject[0];  // firstElement is now = {"name":"Whats up","error":"Your name required!"}
document.getElementById('text1').innerHTML = firstElement.error;

// or immediately:
document.getElementById('text2').innerHTML = yourObject[0].error;