Bootstrap Photo Swipe

-
Pro Component

JavaScript image gallery for mobile and desktop, modular, framework independent.


Initialization

JS

In order to use this plugin on your page you will need to include the following scripts in the “Optional JS” area from the page’s footer:

<script src="../../../assets/js/plugins/photoswipe.min.js"></script>
<script src="../../../assets/js/plugins/photoswipe-ui-default.min.js"></script>

Example

// Products gallery

  var initPhotoSwipeFromDOM = function(gallerySelector) {

    // parse slide data (url, title, size ...) from DOM elements
    // (children of gallerySelector)
    var parseThumbnailElements = function(el) {
      var thumbElements = el.childNodes,
        numNodes = thumbElements.length,
        items = [],
        figureEl,
        linkEl,
        size,
        item;

      for (var i = 0; i < numNodes; i++) {

        figureEl = thumbElements[i]; // <figure> element
        // include only element nodes
        if (figureEl.nodeType !== 1) {
          continue;
        }

        linkEl = figureEl.children[0]; // <a> element

        size = linkEl.getAttribute('data-size').split('x');

        // create slide object
        item = {
          src: linkEl.getAttribute('href'),
          w: parseInt(size[0], 10),
          h: parseInt(size[1], 10)
        };

        if (figureEl.children.length > 1) {
          // <figcaption> content
          item.title = figureEl.children[1].innerHTML;
        }

        if (linkEl.children.length > 0) {
          // <img> thumbnail element, retrieving thumbnail url
          item.msrc = linkEl.children[0].getAttribute('src');
        }

        item.el = figureEl; // save link to element for getThumbBoundsFn
        items.push(item);
      }

      return items;
    };

    // find nearest parent element
    var closest = function closest(el, fn) {
      return el && (fn(el) ? el : closest(el.parentNode, fn));
    };

    // triggers when user clicks on thumbnail
    var onThumbnailsClick = function(e) {
      e = e || window.event;
      e.preventDefault ? e.preventDefault() : e.returnValue = false;

      var eTarget = e.target || e.srcElement;

      // find root element of slide
      var clickedListItem = closest(eTarget, function(el) {
        return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
      });

      if (!clickedListItem) {
        return;
      }

      // find index of clicked item by looping through all child nodes
      // alternatively, you may define index via data- attribute
      var clickedGallery = clickedListItem.parentNode,
        childNodes = clickedListItem.parentNode.childNodes,
        numChildNodes = childNodes.length,
        nodeIndex = 0,
        index;

      for (var i = 0; i < numChildNodes; i++) {
        if (childNodes[i].nodeType !== 1) {
          continue;
        }

        if (childNodes[i] === clickedListItem) {
          index = nodeIndex;
          break;
        }
        nodeIndex++;
      }



      if (index >= 0) {
        // open PhotoSwipe if valid index found
        openPhotoSwipe(index, clickedGallery);
      }
      return false;
    };

    // parse picture index and gallery index from URL (#&pid=1&gid=2)
    var photoswipeParseHash = function() {
      var hash = window.location.hash.substring(1),
        params = {};

      if (hash.length < 5) {
        return params;
      }

      var vars = hash.split('&');
      for (var i = 0; i < vars.length; i++) {
        if (!vars[i]) {
          continue;
        }
        var pair = vars[i].split('=');
        if (pair.length < 2) {
          continue;
        }
        params[pair[0]] = pair[1];
      }

      if (params.gid) {
        params.gid = parseInt(params.gid, 10);
      }

      return params;
    };

    var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
      var pswpElement = document.querySelectorAll('.pswp')[0],
        gallery,
        options,
        items;

      items = parseThumbnailElements(galleryElement);

      // define options (if needed)
      options = {

        // define gallery index (for URL)
        galleryUID: galleryElement.getAttribute('data-pswp-uid'),

        getThumbBoundsFn: function(index) {
          // See Options -> getThumbBoundsFn section of documentation for more info
          var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
            pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
            rect = thumbnail.getBoundingClientRect();

          return {
            x: rect.left,
            y: rect.top + pageYScroll,
            w: rect.width
          };
        }

      };

      // PhotoSwipe opened from URL
      if (fromURL) {
        if (options.galleryPIDs) {
          // parse real index when custom PIDs are used
          // http://photoswipe.com/documentation/faq.html#custom-pid-in-url
          for (var j = 0; j < items.length; j++) {
            if (items[j].pid == index) {
              options.index = j;
              break;
            }
          }
        } else {
          // in URL indexes start from 1
          options.index = parseInt(index, 10) - 1;
        }
      } else {
        options.index = parseInt(index, 10);
      }

      // exit if index not found
      if (isNaN(options.index)) {
        return;
      }

      if (disableAnimation) {
        options.showAnimationDuration = 0;
      }

      // Pass data to PhotoSwipe and initialize it
      gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options);
      gallery.init();
    };

    // loop through all gallery elements and bind events
    var galleryElements = document.querySelectorAll(gallerySelector);

    for (var i = 0, l = galleryElements.length; i < l; i++) {
      galleryElements[i].setAttribute('data-pswp-uid', i + 1);
      galleryElements[i].onclick = onThumbnailsClick;
    }

    // Parse URL and open gallery if it contains #&pid=3&gid=1
    var hashData = photoswipeParseHash();
    if (hashData.pid && hashData.gid) {
      openPhotoSwipe(hashData.pid, galleryElements[hashData.gid - 1], true, true);
    }
  };

  // execute above function
  initPhotoSwipeFromDOM('.my-gallery');