JSFiddle - React, Tailwind, and code Playground

HTML

<input class="input1" type="button" value="input1" />
<input class="input2" type="button" value="input2" />

<div class="giftPopup shown"></div>


<div id="giftPopup"></div>

CSS

.giftPopup {display:none; background:red; border:2px solid black}
.giftPopup.shown {display:block; height:100px; width:100px; margin-top:50px}

JavaScript

$('.input1').click(function(){
	    $('#giftPopup').toggleClass('shown');  
});