Slick Playground

<!DOCTYPE html>
<html>

  <head>
    <script data-require="jquery@3.0.0" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.js"></script>
    <link rel="stylesheet" type="text/css" href="//cdn.jsdelivr.net/jquery.slick/1.6.0/slick.css" />
    <link rel="stylesheet" type="text/css" href="slick-theme.css" />
    <link rel="stylesheet" type="text/css" href="styles.css" />
  </head>

  <body>
    <h1>SlickJS Playground</h1>
    
    <h2>Without Fade <small>as expected</small></h2>
    
    <div id="without-fade" class="carousel container">
      <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>
    
    <hr>
    
    <h2>With Fade <small>not as expected</small></h2>
    <p>4 Slides should be displayed next to each other but only one slide is shown.</p>
    
    <div id="with-fade" class="carousel container">
      <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>
    
    
    <script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha256-cCueBR6CsyA4/9szpPfrX3s49M9vUU5BgtiJj06wt/s=" crossorigin="anonymous"></script>
    <script src="//cdn.jsdelivr.net/jquery.slick/1.6.0/slick.min.js"></script>
    <script src="script.js"></script>
  </body>

</html>

// Code goes here

(function() {
  $('#without-fade').slick({
    infinite: true,
    slidesToShow: 4,
    dots: true    
  });
  
  $('#with-fade').slick({
    fade: true,
    infinite: true,
    slidesToShow: 4,
    dots: true    
  });
})();

/* Styles go here */

/* 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: -25px;

    display: block;

    width: 100%;
    padding: 0;
    margin: 0;

    list-style: none;

    text-align: center;
}
.slick-dots li
{
    position: relative;

    display: inline-block;

    width: 20px;
    height: 20px;
    margin: 0 5px;
    padding: 0;

    cursor: pointer;
}
.slick-dots li button
{
    font-size: 0;
    line-height: 0;

    display: block;

    width: 20px;
    height: 20px;
    padding: 5px;

    cursor: pointer;

    color: transparent;
    border: 0;
    outline: none;
    background: transparent;
}
.slick-dots li button:hover,
.slick-dots li button:focus
{
    outline: none;
}
.slick-dots li button:hover:before,
.slick-dots li button:focus:before
{
    opacity: 1;
}
.slick-dots li button:before
{
    font-family: 'slick';
    font-size: 6px;
    line-height: 20px;

    position: absolute;
    top: 0;
    left: 0;

    width: 20px;
    height: 20px;

    content: '•';
    text-align: center;

    opacity: .25;
    color: black;

    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
.slick-dots li.slick-active button:before
{
    opacity: .75;
    color: black;
}

* {
  font-family: Helvetica;
}

.container {
  padding-left: 30px;
  padding-right: 30px;
}

.carousel {
  width: 75%;
  margin-left: auto;
  margin-right: auto;
}

h2 > small {
  color: gray;
}