You have incorrectly connected. You must add the keyword https: before each link in order to work.
I implemented such a small animation so that you can see that everything works and the problem is that you need to add the full path to external resources.
$(".single-item").slick({ dots: true });
.container { margin: 0 auto; padding: 40px; width: 80%; color: #333; background: #419be0; } .slick-slide { text-align: center; color: #419be0; background: white; }
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery-migrate/3.0.1/jquery-migrate.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.js"></script> <div class='container'> <div class='single-item'> <div><h3>1</h3></div> <div><h3>2</h3></div> <div><h3>3</h3></div> <div><h3>4</h3></div> <div><h3>5</h3></div> <div><h3>6</h3></div> </div> </div>
JQand third-party libraries, it is better to connect to<head></head>- Air