JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sam">div 1</div>
<div class="sam">div 2</div>
<div class="sam">div 3</div>
<div class="sam">div 4</div>

CSS

.expanded {
    border-style:solid;
    border-width:1px;
    border-color:black;
    background-color:yellow;
    min-height:50px;
}

JavaScript

$(document).on('click', '.sam', function () {
    if ($(this).hasClass('expanded')) {
        $(this).removeClass('expanded');
    } else {
        $(this).addClass('expanded');
    }
});

$(document).ready(function () {
    //Im just test to write some divs after document ready
    var output = '<div class="sam">div 5</div>';
    $(output).insertAfter('.sam:last').fadeIn('slow');
    var output = '<div class="sam">div 6</div>';
    $(output).insertAfter('.sam:last').fadeIn('slow');
});