JSFiddle - React, Tailwind, and code Playground

HTML

<div class=1>ааа
   <div class =2>ааа
   </div>
</div>

JavaScript

$(".1").mouseup(function(){
$(this).append('<span style="color:#F00;">Mouse up.</span>');
}).mousedown(function(){
$(this).append('<span style="color:#00F;">Mouse down.</span>');
});