JSFiddle - React, Tailwind, and code Playground

HTML

<button class="btnAdd1">click1</button>
<button class="btnAdd2">click2</button>
<button class="btnAdd3">click3</button>

JavaScript

for(var i = 1 ; i <= 3 ; i++)
{
    $('.btnAdd'+i).click(function(idx){
           return function(){alert(idx);};
     }(i));
}