jQuery addClass example

Change class name on click in jQuery

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
   <!-- <link rel="stylesheet" href="reset-meyer-light.css"/> -->
    <link rel="stylesheet" type="text/css" href="slick/slick.css"/>
  <link rel="stylesheet" type="text/css" href="slick/slick-theme.css"/>
  <link rel="stylesheet" href="styles.css"/>
</head>
<body>
   <div class="page">
   
    <div class="center">
    <div>your content</div>
    <div>your content</div>
    <div>your content</div>
    <div>your content</div>
    <div>your content</div>
    <div>your content</div>
    <div>your content</div>
  </div>
</div>
 <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
  <script src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
  <script src="slick/slick.min.js"></script>
  <script src="global.js"></script>
</body>
</html>

CSS

@charset 'UTF-8';
/* Slider */
.slick-loading .slick-list
{
    background: #fff url('./ajax-loader.gif') center center no-repeat;
}

/* Icons */
@font-face
{
    font-family: 'slick';
    font-weight: normal;
    font-style: normal;

    src: url('./fonts/slick.eot');
    src: url('./fonts/slick.eot?#iefix') format('embedded-opentype'), url('./fonts/slick.woff') format('woff'), url('./fonts/slick.ttf') format('truetype'), url('./fonts/slick.svg#slick') format('svg');
}
/* Arrows */
.slick-prev,
.slick-next
{
    font-size: 0;
    line-height: 0;

    position: absolute;
    top: 50%;

    display: block;

    width: 20px;
    height: 20px;
    padding: 0;
    -webkit-transform: translate(0, -50%);
    -ms-transform: translate(0, -50%);
    transform: translate(0, -50%);

    cursor: pointer;

    color: transparent;
    border: none;
    outline: none;
    background: transparent;
}
.slick-prev:hover,
.slick-prev:focus,
.slick-next:hover,
.slick-next:focus
{
    color: transparent;
    outline: none;
    background: transparent;
}
.slick-prev:hover:before,
.slick-prev:focus:before,
.slick-next:hover:before,
.slick-next:focus:before
{
    opacity: 1;
}
.slick-prev.slick-disabled:before,
.slick-next.slick-disabled:before
{
    opacity: .25;
}

.slick-prev:before,
.slick-next:before
{
    font-family: 'slick';
    font-size: 20px;
    line-height: 1;

    opacity: .75;
    color: white;

    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.slick-prev
{
    left: -25px;
}
[dir='rtl'] .slick-prev
{
    right: -25px;
    left: auto;
}
.slick-prev:before
{
    content: '←';
}
[dir='rtl'] .slick-prev:before
{
    content: '→';
}

.slick-next
{
    right: -25px;
}
[dir='rtl'] .slick-next
{
    right: auto;
    left: -25px;
}
.slick-next:before
{
    content: '→';
}
[dir='rtl'] .slick-next:before
{
    content: '←';
}

/* Dots */
.slick-dotted.slick-slider
{
    margin-bottom: 30px;
}

.slick-dots
{
    position: absolute;
    bottom:...

JavaScript

$('.center').slick({
  centerMode: true,
  centerPadding: '60px',
  slidesToShow: 3,
  responsive: [
    {
      breakpoint: 768,
      settings: {
        arrows: false,
        centerMode: true,
        centerPadding: '40px',
        slidesToShow: 3
      }
    },
    {
      breakpoint: 480,
      settings: {
        arrows: false,
        centerMode: true,
        centerPadding: '40px',
        slidesToShow: 1
      }
    }
  ]
});