jQuery addClass example
Change class name on click in jQuery
by joshmoto
HTML
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js"></script>
<!-- Book Your Chef -->
<div class="bg-dark card">
<div class="card-header core-card-header">
<h2>Book Your Chef</h2>
</div>
<div class="card-body core-card-body">
<div class="card-columns">
<div class="card">
<img class="card-img-top img-fluid" src="//placehold.it/800x600/555" alt="Card image cap">
</div>
<div class="card">
<img class="card-img-top img-fluid" src="//placehold.it/800x600" alt="Card image cap">
</div>
<div class="card">
<img class="card-img-top img-fluid" src="//placehold.it/800x600/eee" alt="Card image cap">
</div>
</div>
</div>
</div>