JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main"><div class="forum">click me</div></div>
<div class="main"><div class="forum">click me</div></div>
<div class="main"><div class="forum">click me</div></div>
<div class="main"><div class="forum">click me</div></div>
<div class="main"><div class="forum">click me</div></div>

JavaScript

$("div.forum").each(function(){
    $(this).click(function(){
        alert('hello world');
    });
});