JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flow-chart">
   <img data-class="1" src="http://placehold.it/50x50">
   <img data-class="2" src="http://placehold.it/50x50">
   <img data-class="3" src="http://placehold.it/50x50">
</div>

<div class="1 hide_show">1</div>
<div class="2 hide_show" style="display: none">2</div>
<div class="3 hide_show" style="display: none">3</div>

JavaScript

$(".flow-chart img").click(function () {

    var div_class = $(this).data("class");

    $(".hide_show:visible").fadeOut('slow', function() {
        $("."+div_class).fadeIn("slow");
    });
    
});