JSFiddle - React, Tailwind, and code Playground

HTML

<input id="Treatment" type="button" onclick="$();" value="Treatment" />
<div id="Div1">  
    
</div>

<div id="Div2">  
  
</div>

CSS

#Div1 {
    background-color: black;
    height: 100px;
    margin: 100px;
    width: 100px;    
}

#Div2 {
    background-color: green;
    height: 100px;
    margin: 100px;
    width: 100px;
    color:yellow;
}

JavaScript

$("#Treatment").on("click", function () { 
 
 var i = 1;
 $('#Div2').show(000,function(){ 
 $("#Div1").hide(000,function(){      
 //alert("Ok");
 
 while (i<1100000) {
 
 $('#Div2').text(i);
 i++;
 
 };

 
});
});

});