Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <div class="carousel-wrapper">
    <div class="carousel">

      <img class="carousel__photo initial" src="http://placekitten.com/1600/900">
      <img class="carousel__photo" src="http://placekitten.com/g/1600/900">
      <img class="carousel__photo" src="http://placekitten.com/1600/900">
      <img class="carousel__photo" src="http://placekitten.com/g/1600/900">
      <img class="carousel__photo" src="http://placekitten.com/1600/900">
      
      <div class="carousel__button--next"></div>
      <div class="carousel__button--prev"></div>

    </div>
  </div>
              
            
!

CSS

              
                /* Parent wrapper to carousel. Width can be changed as needed. */
.carousel-wrapper {
  overflow: hidden;
  width: 90%;
  margin: auto;
}

/* Apply 'border-box' to 'box-sizing' so border and padding is included in the width and height. */
.carousel-wrapper * {
  box-sizing: border-box;
}

/* We'll be using the 'transform' property to move the carousel's items, so setting the 'transform-style' to 'preserve-3d' will make sure our nested elements are rendered properly in the 3D space. */
.carousel {
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

/* By default we're hiding items (except the initial one) until the JS initiates. Elements are absolutely positioned with a width of 100% (as we're styling for mobile first), letting the content's height dictate the height of the carousel. Our magic property here for all our animation needs is 'transition', taking the properties we wish to animate 'transform' and 'opacity', along with the length of time in seconds. */
.carousel__photo {
  opacity: 0;
  position: absolute;
  top:0;
  width: 100%;
  margin: auto;
  padding: 1rem 4rem;
  z-index: 100;
  transition: transform .5s, opacity .5s, z-index .5s;
}

/* Display the initial item and bring it to the front using 'z-index'. These styles also apply to the 'active' item. */
.carousel__photo.initial,
.carousel__photo.active {
  opacity: 1;
  position: relative;
  z-index: 900;
}

/* Set 'z-index' to sit behind our '.active' item. */
.carousel__photo.prev,
.carousel__photo.next {
  z-index: 800;
}

/* Translate previous item to the left */
.carousel__photo.prev {
  transform: translateX(-100%);
}

/* Translate next item to the right */
.carousel__photo.next {
  transform: translateX(100%);
}

/* Style navigation buttons to sit in the middle, either side of the carousel. */
.carousel__button--prev,
.carousel__button--next {
  position: absolute;
  top:50%;
  width: 3rem;
  height: 3rem;
  background-color: #FFF;
  transform: translateY(-50%);
  border-radius: 50%;
  cursor: pointer; 
  z-index: 1001; /* Sit on top of everything */
  border:1px solid black;
/*  opacity: 0;  Hide buttons until carousel is initialised 
  transition:opacity 1s;*/
}

.carousel__button--prev {
  left:0;
}

.carousel__button--next {
  right:0;
}

/* Use pseudo elements to insert arrows inside of navigation buttons */
.carousel__button--prev::after,
.carousel__button--next::after {
  content: " ";
  position: absolute;
  width: 10px;
  height: 10px;
  top: 50%;
  left: 54%;
  border-right: 2px solid black;
  border-bottom: 2px solid black;
  transform: translate(-50%, -50%) rotate(135deg);
}

.carousel__button--next::after {
  left: 47%;
  transform: translate(-50%, -50%) rotate(-45deg);
}
              
            
!

JS

              
                !(function(d){
  // Variables to target our base class,  get carousel items, count how many carousel items there are, set the slide to 0 (which is the number that tells us the frame we're on), and set motion to true which disables interactivity.
  var itemClassName = "carousel__photo";
      items = d.getElementsByClassName(itemClassName),
      totalItems = items.length,
      slide = 0,
      moving = true; 

  // To initialise the carousel we'll want to update the DOM with our own classes
  function setInitialClasses() {

    // Target the last, initial, and next items and give them the relevant class.
    // This assumes there are three or more items.
    items[totalItems - 1].classList.add("prev");
    items[0].classList.add("active");
    items[1].classList.add("next");
  }

  // Set click events to navigation buttons

  function setEventListeners() {
    var next = d.getElementsByClassName('carousel__button--next')[0],
        prev = d.getElementsByClassName('carousel__button--prev')[0];

    next.addEventListener('click', moveNext);
    prev.addEventListener('click', movePrev);
  }

  // Disable interaction by setting 'moving' to true for the same duration as our transition (0.5s = 500ms)
  function disableInteraction() {
    moving = true;

    setTimeout(function(){
      moving = false
    }, 500);
  }

  function moveCarouselTo(slide) {

    // Check if carousel is moving, if not, allow interaction
    if(!moving) {

      // temporarily disable interactivity
      disableInteraction();

      // Preemptively set variables for the current next and previous slide, as well as the potential next or previous slide.
      var newPrevious = slide - 1,
          newNext = slide + 1,
          oldPrevious = slide - 2,
          oldNext = slide + 2;

      // Test if carousel has more than three items
      if ((totalItems - 1) > 3) {

        // Checks if the new potential slide is out of bounds and sets slide numbers
        if (newPrevious <= 0) {
          oldPrevious = (totalItems - 1);
        } else if (newNext >= (totalItems - 1)){
          oldNext = 0;
        }

        // Check if current slide is at the beginning or end and sets slide numbers
        if (slide === 0) {
          newPrevious = (totalItems - 1);
          oldPrevious = (totalItems - 2);
          oldNext = (slide + 1);
        } else if (slide === (totalItems -1)) {
          newPrevious = (slide - 1);
          newNext = 0;
          oldNext = 1;
        }

        // Now we've worked out where we are and where we're going, by adding and removing classes, we'll be triggering the carousel's transitions.

        // Based on the current slide, reset to default classes.
        items[oldPrevious].className = itemClassName;
        items[oldNext].className = itemClassName;

        // Add the new classes
        items[newPrevious].className = itemClassName + " prev";
        items[slide].className = itemClassName + " active";
        items[newNext].className = itemClassName + " next";
      }
    }
  }

  // Next navigation handler
  function moveNext() {

    // Check if moving
    if (!moving) {

      // If it's the last slide, reset to 0, else +1
      if (slide === (totalItems - 1)) {
        slide = 0;
      } else {
        slide++;
      }

      // Move carousel to updated slide
      moveCarouselTo(slide);
    }
  }

  // Previous navigation handler
  function movePrev() {

    // Check if moving
    if (!moving) {

      // If it's the first slide, set as the last slide, else -1
      if (slide === 0) {
        slide = (totalItems - 1);
      } else {
        slide--;
      }

      // Move carousel to updated slide
      moveCarouselTo(slide);
    }
  }

  // Initialise carousel
  function initCarousel() {
    setInitialClasses();
    setEventListeners();

    // Set moving to false now that the carousel is ready
    moving = false;
  }

  // make it rain
  initCarousel();

}(document));
              
            
!
999px

Console