Ionic Slider View with preview

index.html

<div id="js-slides" class="slider">
    <div class="slider-slides">
      <div class="slide slider-slide">1</div>
      <div class="slide slider-slide">2</div>
      <div class="slide slider-slide">3</div>
      <div class="slide slider-slide">4</div>
      <div class="slide slider-slide">5</div>
    </div>
  </div>

ionic-slider-view-with-preview.markdown

Ionic Slider View with preview

A Pen by Matthew Daniel Brown on CodePen.

License.

script.js

var Slider = {
  initialize: function (options) {
    var slider = this;

    // utilities
    var noop = function() {}; // simple no operation function
    var offloadFn = function(fn) { setTimeout(fn || noop, 0); }; // offload a functions execution

    // check browser capabilities
    var browser = {
      addEventListener: !!window.addEventListener,
      touch: ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch,
      transitions: (function(temp) {
        var props = ['transitionProperty', 'WebkitTransition', 'MozTransition', 'OTransition', 'msTransition'];
        for ( var i in props ) if (temp.style[ props[i] ] !== undefined) return true;
        return false;
      })(document.createElement('swipe'))
    };


    var container = options.el;

    // quit if no root element
    if (!container) return;
    var element = container.children[0];
    var slides, slidePos, width, length;
    options = options || {};
    var index = parseInt(options.startSlide, 10) || 0;
    var speed = options.speed || 300;
    options.continuous = options.continuous !== undefined ? options.continuous : true;

    function setup() {

      // do not setup if the container has no width
      if (!container.offsetWidth) {
        return;
      }

      // cache slides
      slides = element.children;
      length = slides.length;

      // set continuous to false if only one slide
      if (slides.length < 2) options.continuous = false;

      //special case if two slides
      if (browser.transitions && options.continuous && slides.length < 3) {
        element.appendChild(slides[0].cloneNode(true));
        element.appendChild(element.children[1].cloneNode(true));
        slides = element.children;
      }

      // create an array to store current positions of each slide
      slidePos = new Array(slides.length);

      // determine width of each slide
      width = (container.offsetWidth || container.getBoundingClientRect().width) * 0.75;

      element.style.width = (slides.length * width) + 'px';

      // stack elements
      var pos = slides.length;
      while(pos--) {

        var slide = slides[pos];

        slide.style.width = width + 'px';
        slide.setAttribute('data-index', pos);

        if (browser.transitions) {
          slide.style.left = (pos * -width) + 'px';
          move(pos, index > pos ? -width : (index < pos ? width : 0), 0);
        }

      }

      // reposition elements before and after index
      if (options.continuous && browser.transitions) {
        move(circle(index - 1), -width, 0);
        move(circle(index + 1), width, 0);
      }

      if (!browser.transitions) element.style.left = (index * -width) + 'px';

      container.style.visibility = 'visible';

      options.slidesChanged && options.slidesChanged();
    }

    function prev(slideSpeed) {

      if (options.continuous) slide(index - 1, slideSpeed);
      else if (index) slide(index - 1, slideSpeed);

    }

    function next(slideSpeed) {

      if (options.continuous) slide(index + 1, slideSpeed);
      else if (index < slides.length - 1) slide(index + 1, slideSpeed);

    }

    function circle(index) {

      // a simple positive modulo using slides.length
      return (slides.length + (index % slides.length)) % slides.length;

    }

    function slide(to, slideSpeed) {

      // do nothing if already on requested slide
      if (index == to) return;

      if (browser.transitions) {

        var direction = Math.abs(index - to) / (index - to); // 1: backward, -1: forward

        // get the actual position of the slide
        if (options.continuous) {
          var naturalDirection = direction;
          direction = -slidePos[circle(to)] / width;

          // if going forward but to < index, use to = slides.length + to
          // if going backward but to > index, use to = -slides.length + to
          if (direction !== naturalDirection) to = -direction * slides.length + to;

        }

        var diff = Math.abs(index - to) - 1;

        // move all the slides between index and to in the right direction
        while (diff--) move( circle((to > index ? to : index) - diff - 1), width * direction, 0);

        to = circle(to);

        move(index, width * direction, slideSpeed || speed);
        move(to, 0, slideSpeed || speed);

        if (options.continuous) move(circle(to - direction), -(width * direction), 0); // we need to get the next in place

      } else {

        to = circle(to);
        animate(index * -width, to * -width, slideSpeed || speed);
        //no fallback for a circular continuous if the browser does not accept transitions
      }

      index = to;
      offloadFn(options.callback && options.callback(index, slides[index]));
    }

    function move(index, dist, speed, z) {

      translate(index, dist, speed, z || 0);
      slidePos[index] = dist;

    }

    function translate(index, dist, speed, z) {

      var slide = slides[index];
      var style = slide && slide.style;

      if (!style) return;

      style.webkitTransitionDuration =
      style.MozTransitionDuration =
      style.msTransitionDuration =
      style.OTransitionDuration =
      style.transitionDuration = speed + 'ms';

      style.webkitTransform = 'translate3d(' + dist + 'px, 0 ,0)';
      // style.msTransform =
      // style.MozTransform =
      // style.OTransform = 'translate3d(' + dist + 'px, 0, ' + z + 'px)';

    }

    function animate(from, to, speed) {

      // if not an animation, just reposition
      if (!speed) {

        element.style.left = to + 'px';
        return;

      }

      var start = +new Date();

      var timer = setInterval(function() {

        var timeElap = +new Date() - start;

        if (timeElap > speed) {

          element.style.left = to + 'px';

          if (delay) begin();

          options.transitionEnd && options.transitionEnd.call(event, index, slides[index]);

          clearInterval(timer);
          return;

        }

        element.style.left = (( (to - from) * (Math.floor((timeElap / speed) * 100) / 100) ) + from) + 'px';

      }, 4);

    }

    // setup auto slideshow
    var delay = options.auto || 0;
    var interval;

    function begin() {

      interval = setTimeout(next, delay);

    }

    function stop() {

      delay = options.auto || 0;
      clearTimeout(interval);

    }


    // setup initial vars
    var start = {};
    var delta = {};
    var isScrolling;

    // setup event capturing
    var events = {

      handleEvent: function(event) {
        if(event.type == 'mousedown' || event.type == 'mouseup' || event.type == 'mousemove') {
          event.touches = [{
            pageX: event.pageX,
            pageY: event.pageY
          }];
        }

        switch (event.type) {
          case 'mousedown': this.start(event); break;
          case 'touchstart': this.start(event); break;
          case 'touchmove': this.touchmove(event); break;
          case 'mousemove': this.touchmove(event); break;
          case 'touchend': offloadFn(this.end(event)); break;
          case 'mouseup': offloadFn(this.end(event)); break;
          case 'webkitTransitionEnd':
          case 'msTransitionEnd':
          case 'oTransitionEnd':
          case 'otransitionend':
          case 'transitionend': offloadFn(this.transitionEnd(event)); break;
          case 'resize': offloadFn(setup); break;
        }

        if (options.stopPropagation) event.stopPropagation();

      },
      start: function(event) {

        var touches = event.touches[0];

        // measure start values
        start = {

          // get initial touch coords
          x: touches.pageX,
          y: touches.pageY,

          // store time to determine touch duration
          time: +new Date()

        };

        // used for testing first move event
        isScrolling = undefined;

        // reset delta and end measurements
        delta = {};

        // attach touchmove and touchend listeners
        if(browser.touch) {
          element.addEventListener('touchmove', this, false);
          element.addEventListener('touchend', this, false);
        } else {
          element.addEventListener('mousemove', this, false);
          element.addEventListener('mouseup', this, false);
          document.addEventListener('mouseup', this, false);
        }
      },
      touchmove: function(event) {

        // ensure swiping with one touch and not pinching
        // ensure sliding is enabled
        if (event.touches.length > 1 ||
            event.scale && event.scale !== 1 ||
            slider.slideIsDisabled) {
          return;
        }

        if (options.disableScroll) event.preventDefault();

        var touches = event.touches[0];

        // measure change in x and y
        delta = {
          x: touches.pageX - start.x,
          y: touches.pageY - start.y
        };

        // determine if scrolling test has run - one time test
        if ( typeof isScrolling == 'undefined') {
          isScrolling = !!( isScrolling || Math.abs(delta.x) < Math.abs(delta.y) );
        }

        // if user is not trying to scroll vertically
        if (!isScrolling) {

          // prevent native scrolling
          event.preventDefault();

          // stop slideshow
          stop();

          // increase resistance if first or last slide
          if (options.continuous) { // we don't add resistance at the end

            translate(circle(index - 1), delta.x + slidePos[circle(index - 1)], 0);
            translate(index, delta.x + slidePos[index], 0);
            translate(circle(index + 1), delta.x + slidePos[circle(index + 1)], 0);

          } else {

            delta.x =
              delta.x /
                ( (!index && delta.x > 0 ||         // if first slide and sliding left
                  index == slides.length - 1 &&     // or if last slide and sliding right
                  delta.x < 0                       // and if sliding at all
                ) ?
                ( Math.abs(delta.x) / width + 1 )      // determine resistance level
                : 1 );                                 // no resistance if false

            // translate 1:1
            translate(index - 1, delta.x + slidePos[index - 1], 0);
            translate(index, delta.x + slidePos[index], 0);
            translate(index + 1, delta.x + slidePos[index + 1], 0);
          }

          options.onDrag && options.onDrag();
        }

      },
      end: function() {

        // measure duration
        var duration = +new Date() - start.time;

        // determine if slide attempt triggers next/prev slide
        var isValidSlide =
              Number(duration) < 250 &&         // if slide duration is less than 250ms
              Math.abs(delta.x) > 20 ||         // and if slide amt is greater than 20px
              Math.abs(delta.x) > width / 2;      // or if slide amt is greater than half the width

        // determine if slide attempt is past start and end
        var isPastBounds = (!index && delta.x > 0) ||      // if first slide and slide amt is greater than 0
              (index == slides.length - 1 && delta.x < 0); // or if last slide and slide amt is less than 0

        if (options.continuous) isPastBounds = false;

        // determine direction of swipe (true:right, false:left)
        var direction = delta.x < 0;

        // if not scrolling vertically
        if (!isScrolling) {

          if (isValidSlide && !isPastBounds) {

            if (direction) {

              if (options.continuous) { // we need to get the next in this direction in place

                move(circle(index - 1), -width, 0);
                move(circle(index + 2), width, 0);

              } else {
                move(index - 1, -width, 0);
              }

              move(index, slidePos[index] - width, speed);
              move(circle(index + 1), slidePos[circle(index + 1)] - width, speed);
              index = circle(index + 1);

            } else {
              if (options.continuous) { // we need to get the next in this direction in place

                move(circle(index + 1), width, 0, -1);
                move(circle(index - 2), -width, 0, -1);

              } else {
                move(index + 1, width, 0);
              }

              move(index, slidePos[index] + width, speed);
              move(circle(index - 1), slidePos[circle(index - 1)] + width, speed);
              index = circle(index - 1);

            }

            options.callback && options.callback(index, slides[index]);

          } else {

            if (options.continuous) {

              move(circle(index - 1), -width, speed);
              move(index, 0, speed);
              move(circle(index + 1), width, speed);

            } else {

              move(index - 1, -width, speed);
              move(index, 0, speed);
              move(index + 1, width, speed);
            }

          }

        }

        // kill touchmove and touchend event listeners until touchstart called again
        if(browser.touch) {
          element.removeEventListener('touchmove', events, false);
          element.removeEventListener('touchend', events, false);
        } else {
          element.removeEventListener('mousemove', events, false);
          element.removeEventListener('mouseup', events, false);
          document.removeEventListener('mouseup', events, false);
        }

        options.onDragEnd && options.onDragEnd();
      },
      transitionEnd: function(event) {

        if (parseInt(event.target.getAttribute('data-index'), 10) == index) {

          if (delay) begin();

          options.transitionEnd && options.transitionEnd.call(event, index, slides[index]);

        }

      }

    };

    // Public API
    this.update = function() {
      setTimeout(setup);
    };
    this.setup = function() {
      setup();
    };

    this.loop = function(value) {
      if (arguments.length) options.continuous = !!value;
      return options.continuous;
    };

    this.enableSlide = function(shouldEnable) {
      if (arguments.length) {
        this.slideIsDisabled = !shouldEnable;
      }
      return !this.slideIsDisabled;
    };

    this.slide = this.select = function(to, speed) {
      // cancel slideshow
      stop();

      slide(to, speed);
    };

    this.prev = this.previous = function() {
      // cancel slideshow
      stop();

      prev();
    };

    this.next = function() {
      // cancel slideshow
      stop();

      next();
    };

    this.stop = function() {
      // cancel slideshow
      stop();
    };

    this.start = function() {
      begin();
    };

    this.autoPlay = function(newDelay) {
      if (!delay || delay < 0) {
        stop();
      } else {
        delay = newDelay;
        begin();
      }
    };

    this.currentIndex = this.selected = function() {
      // return current index position
      return index;
    };

    this.slidesCount = this.count = function() {
      // return total number of slides
      return length;
    };

    this.kill = function() {
      // cancel slideshow
      stop();

      // reset element
      element.style.width = '';
      element.style.left = '';

      // reset slides so no refs are held on to
      slides && (slides.length = []);

      // removed event listeners
      if (browser.addEventListener) {

        // remove current event listeners
        element.removeEventListener('touchstart', events, false);
        element.removeEventListener('webkitTransitionEnd', events, false);
        element.removeEventListener('msTransitionEnd', events, false);
        element.removeEventListener('oTransitionEnd', events, false);
        element.removeEventListener('otransitionend', events, false);
        element.removeEventListener('transitionend', events, false);
        window.removeEventListener('resize', events, false);

      }
      else {

        window.onresize = null;

      }
    };

    this.load = function() {
      // trigger setup
      setup();

      // start auto slideshow if applicable
      if (delay) begin();


      // add event listeners
      if (browser.addEventListener) {

        // set touchstart event on element
        if (browser.touch) {
          element.addEventListener('touchstart', events, false);
        } else {
          element.addEventListener('mousedown', events, false);
        }

        if (browser.transitions) {
          element.addEventListener('webkitTransitionEnd', events, false);
          element.addEventListener('msTransitionEnd', events, false);
          element.addEventListener('oTransitionEnd', events, false);
          element.addEventListener('otransitionend', events, false);
          element.addEventListener('transitionend', events, false);
        }

        // set resize event on window
        window.addEventListener('resize', events, false);

      } else {

        window.onresize = function () { setup(); }; // to play nice with old IE

      }
    };

  }
};



window.onload = function() {

  var sliderEl = document.getElementById('js-slides');

  Slider.initialize({
    el: sliderEl,
    continuous: true
  });

  Slider.load();

};

style.scss

@import "bourbon";

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

.slider {
  position: relative;
  overflow: hidden;
  height: 100%;
}

.slider-slides {
  position: relative;
  height: 100%;
  padding: 0 12.5%;
}

.slider-slide {
  line-height: 100vh;
  text-align: center;
  font-weight: bold;
  font-size: 8rem;
  position: relative;
  display: block;
  float: left;
  width: 100%;
  height: 100%;
  vertical-align: top;
}


.slide {
  height: 100%;
}

.slide:nth-child(1) { background-color: #F7E1DF; color: #444; }
.slide:nth-child(2) { background-color: #FF9418; color: #fff; }
.slide:nth-child(3) { background-color: #EF5352; color: #fff; }
.slide:nth-child(4) { background-color: #FFFF1C; color: #444; }
.slide:nth-child(5) { background-color: #FF177C; color: #fff; }