JSFiddle - React, Tailwind, and code Playground

HTML

<div class="click">cliquer ici</div>

<div class="un" style="position:absolute;top:40px;left:10px">une div</div>
<div class="deux"  style="position:absolute;top:40px;left:10px">une 2eme div</div>

CSS

.deux {
display:none;
}

JavaScript

$('.click').click(function(e){    
    $('.un').fadeOut()
     $('.deux').fadeIn();  
});