JSFiddle - React, Tailwind, and code Playground

HTML

<div class="elem">Click here</div>
<div class="elem">Click here</div>

JavaScript

function attachClickToElem() {
        $('.elem').each(function () {
            var $elem = $(this);
            
            // check if event handler already exists
            // if exists, skip this item and go to next item
            if ($elem.data('click-init')) {
                return true;
            }
            
            // flag item to prevent attaching handler again
            $elem.data('click-init', true);
            
            $elem.on('click', function () {
                alert('Hello World');
            });
        });
    }

    $(function () {
        attachClickToElem();
        attachClickToElem();
    });