JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myFirstDiv">first</div>
<div id="mySecondDiv">second</div>

JavaScript

var namespaceA = $('#myFirstDiv');
var namespaceB = $('#mySecondDiv');

$("#myFirstDiv").click(function() {
  namespaceA.hide();
});

$("#mySecondDiv").click(function() {
  namespaceA.show();
});