JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test-class-0">TEST 1</div>
<div class="test-class-1">TEST 2</div>
<div class="test-class-2">TEST 3</div>
<div class="test-class-3">TEST 4</div>

JavaScript

for(var i = 0; i < 4; i++) {
        (function( i ) {
            $('.test-class-'+i).on('click', function(e){ alert(i); });
        })( i );
    }