Slider and Lightbox :: slider (swiper.js) & Lightbox gallery (photoswipe.js)

index.html

<h1>   
  <a title="swiper.js" href="http://idangero.us/swiper/" target="_blank">Swiper.js (4.3.5)</a>
  & 
  <a title="photoswipe" href="http://photoswipe.com/" target="_blank">Photoswipe.js (4.1.1)</a> 
  - Mobile Native feel slider gallery 
</h1>
<p>Combine two of the most powerfull JS plugins (Endless options / Great docs / Fast / Modern / Mobile freindly) - <a title="swiper.js" href="http://idangero.us/swiper/" target="_blank">SWIPER</a> IS PERFECT FOR THIS IDEA BEACUSE OF ITS unique <code>preventClicks</code>  Parameter (Prevent accidental unwanted clicks on links during swiping) - <strong>Works like magic</strong>. Also its really <b>hard</b> to find - Code example of working photoswipe combination with any slider out there(slick, flickity, owl etc.) and in general slider & lightbox - so i hope this example be usefull for you.</p> 

<!-- Slider main container -->
<div class="swiper-container">
  <!-- Additional required wrapper -->
  <ul class="swiper-wrapper my-gallery" itemscope itemtype="http://schema.org/ImageGallery">
    <!-- Slides -->
    <li class="swiper-slide" itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
      <a title="click to zoom-in" href="http://placehold.it/1200x600/EC407A/ffffff?text=Zoom-image-1" itemprop="contentUrl" data-size="1200x600">
        <img src="http://placehold.it/600x300/EC407A/ffffff?text=Thumbnail-image-1" itemprop="thumbnail" alt="Image description" />
      </a> </li>
      <li class="swiper-slide" itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
        <a title="click to zoom-in" href="http://placehold.it/1200x600/AB47BC/ffffff?text=Zoom-image-2" itemprop="contentUrl" data-size="1200x600">
          <img src="http://placehold.it/600x300/AB47BC/ffffff?text=Thumbnail-image-2" itemprop="thumbnail" alt="Image description" />
        </a>
      </li>
      <li class="swiper-slide" itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
        <a title="click to zoom-in" href="http://placehold.it/1200x600/EF5350/ffffff?text=Zoom-image-3" itemprop="contentUrl" data-size="1200x600">
          <img src="http://placehold.it/600x300/EF5350/ffffff?text=Thumbnail-image-3" itemprop="thumbnail" alt="Image description" />
        </a>
      </li>
      <li class="swiper-slide" itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
        <a title="click to zoom-in" href="http://placehold.it/1200x600/1976D2/ffffff?text=Zoom-image-4" itemprop="contentUrl" data-size="1200x600">
          <img src="http://placehold.it/600x300/1976D2/ffffff?text=Thumbnail-image-4" itemprop="thumbnail" alt="Image description" />
        </a>
      </li>
      <li class="swiper-slide" itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
        <a title="click to zoom-in" href="https://picsum.photos/1200/603" itemprop="contentUrl" data-size="1200x600">
          <img src="https://picsum.photos/1200/603" itemprop="thumbnail" alt="Image description" />
        </a>
      </li>
  </ul>    

  <!-- Add Pagination -->
  <div class="swiper-pagination"></div>

  <!-- If we need navigation buttons -->
  <div class="swiper-button-prev"></div>
  <div class="swiper-button-next"></div>
</div>


<!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

  <!-- Background of PhotoSwipe. 
      It's a separate element, as animating opacity is faster than rgba(). -->
  <div class="pswp__bg"></div>

  <!-- Slides wrapper with overflow:hidden. -->
  <div class="pswp__scroll-wrap">

    <!-- Container that holds slides. PhotoSwipe keeps only 3 slides in DOM to save memory. -->
    <!-- don't modify these 3 pswp__item elements, data is added later on. -->
    <div class="pswp__container">
      <div class="pswp__item"></div>
      <div class="pswp__item"></div>
      <div class="pswp__item"></div>
    </div>

    <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
    <div class="pswp__ui pswp__ui--hidden">

      <div class="pswp__top-bar">

        <!--  Controls are self-explanatory. Order can be changed. -->

        <div class="pswp__counter"></div>

        <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>

        <button class="pswp__button pswp__button--share" title="Share"></button>

        <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>

        <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>

        <!-- Preloader demo https://codepen.io/dimsemenov/pen/yyBWoR -->
        <!-- element will get class pswp__preloader--active when preloader is running -->
        <div class="pswp__preloader">
          <div class="pswp__preloader__icn">
            <div class="pswp__preloader__cut">
              <div class="pswp__preloader__donut"></div>
            </div>
          </div>
        </div>
      </div>

      <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
        <div class="pswp__share-tooltip"></div>
      </div>

      <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
          </button>

      <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
          </button>

      <div class="pswp__caption">
        <div class="pswp__caption__center"></div>
      </div>

    </div>

  </div>

</div>

<!-- ////////////////////////
DOCS
////////////////////////////
-->
<section id="docs">
  <br>
   <br>
   <br>
  <hr>
  <h2>Noted / Important</h2>
  
  <ol>
    <li>
      <h3>Loop & Counter</h3>
      <p>
        <strong>  Wont work well </strong> with swiper: <code>loop = true;</code> & photoswipe: <code>counterEl: true,</code>(What is counter? example: 1/5...2/5) - "loop" duplicate images - the photoswipe counter will be wrong. *** If you dont want a
        loop - you can set photoswipe counter <code>counterEl: true,</code>
      </p>
    </li>
    <li>
      <h3>Markup</h3>
      <p>
        <a href="">Schema.org</a> markup + semantic HTML: use unordered (bulleted) list (If you want a div change JS - <strong>"(find) control+f-->"</strong> tagname value) . Copy-paste - this code to check: <a target="_blank" href="https://search.google.com/structured-data/testing-tool">Structured Data Testing Tool - Google</a>
      </p>
    </li>
    <li>
      <h3>Match index</h3>
      <p>
        <strong>
        Extra CODE "match index"
      </strong> - EXAMPLE: When you click(zoom) image1 -- goes to image 2 - close image2 (X) - also the swiper update is position (BETTER User Experience) (find(ctr +f)--> <code>mySwiper.slideTo(getCurrentIndex, false);</code>) - This idea miss
        in most slider & lightbox examples/plugins mixed.
      </p>
    </li>
    <li>
      <h3>Photoswipe options</h3>
      <p>
        JS - line (find) -ctr +f --> the term:<code>// define options (if needed)</code>. You find endless options for <strong>photoswipe</strong> - This is the place to add/modify options. Full Options list her
        <a href="http://photoswipe.com/documentation/options.html" target="_blank">PhotoSwipe
        Options</a>
      </p>
    </li>
    

    <li>
      <h3>SWIPER options</h3>
      <h4>slideperview</h4>
      <p>
        <code>slideperview</code> - option1: Set number (1,2,3 and so on) <a href="http://idangero.us/swiper/demos/110-slides-per-view.html" target="_blank"> - example </a> ||||| option2(<b>"Carousel Mode"</b> this example): Set to "<code>auto</code>"
        than add CSS <a href="https://www.w3schools.com/cssref/pr_dim_width.asp" target="_blank">width Property</a></code> <code>.swiper-slide</code> (in thie case eash slide is 88% width) - <a href="http://idangero.us/swiper/demos/120-slides-per-view-auto.html"
          target="_blank">example</a>.
      </p>
  <h4>spaceBetween & centeredSlides</h4>
  <p>
        Space Between slide by js option <code>spaceBetween</code> - and also usefull to change <code>centeredSlides</code>(true/flase). <br>
        <a href="http://idangero.us/swiper/api/" target="_blank">Swiper API</a>
      </p>
    </li>
  
    <li>
      <h3>
     A non-jQuery dependent
    </h3>
    </li>
  </ol>
<hr>
<h3>Related Example</h3>
<p>
<a title="FancyBox3 & Flickity" href="https://codepen.io/ezra_siton/pen/OQmjoq" target="_blank">#FancyBox3 - lightbox & Flickity Slider</a>
</p>
</section>

script.js

/* 1 of 2 : SWIPER */
var mySwiper = new Swiper(".swiper-container", {
  // If loop true set photoswipe - counterEl: false
  loop: true,
  /* slidesPerView || auto - if you want to set width by css like flickity.js layout - in this case width:80% by CSS */
  slidesPerView: "auto",
  spaceBetween: 7,
  centeredSlides: true,
  // If we need pagination
  pagination: {
    el: ".swiper-pagination",
    clickable: true,
    renderBullet: function(index, className) {
      return '<span class="' + className + '">' + (index + 1) + "</span>";
    }
  },
   // Navigation arrows
    navigation: {
      nextEl: '.swiper-button-next',
      prevEl: '.swiper-button-prev',
    }
});

// 2 of 2 : PHOTOSWIPE
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() === "LI";
    });

    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 = {
      /* "showHideOpacity" uncomment this If dimensions of your small thumbnail don't match dimensions of large image */
      //showHideOpacity:true,

      // Buttons/elements
      closeEl: true,
      captionEl: true,
      fullscreenEl: true,
      zoomEl: true,
      shareEl: true,
      counterEl: false,
      arrowEl: true,
      preloaderEl: true,
      // 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();

    /* EXTRA CODE (NOT FROM THE CORE) - UPDATE SWIPER POSITION TO THE CURRENT ZOOM_IN IMAGE (BETTER UI) */

    // photoswipe event: Gallery unbinds events
    // (triggers before closing animation)
    gallery.listen("unbindEvents", function() {
      // This is index of current photoswipe slide
      var getCurrentIndex = gallery.getCurrentIndex();
      // Update position of the slider
      mySwiper.slideTo(getCurrentIndex, false);
    });
  };

  // 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");

scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe-ui-default.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.3.5/js/swiper.min.js"></script>

slider-and-lightbox-slider-swiper-js-lightbox-gallery-photoswipe-js.markdown

Slider and Lightbox :: slider (swiper.js) & Lightbox gallery (photoswipe.js)

100% mobile optimized - Touch-friendly Combination of swiper.js slider/carousel and photoswipe image gallery lightbox - for the best native look on mobile devices.

A Pen by Ezra Siton Web & Graphic Designer on CodePen.

License.

style.css

/*==================================
             SWIPER
===================================*/
/* remove bullet and space from the list */
ul.swiper-wrapper {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

/* Swiper styles */
.swiper-container {
  max-width: 100%;
}

/* responive image */
.swiper-container img {
  width: 100%;
  height: auto;
}

.swiper-slide {
  text-align: center;

/* Remove this if you want 1 slide perview - than change slidesPerView js-option to 1 -or- 2+ instead of 'auto' */
  width: 80%;
}

/* Swiper custom pagination */
.swiper-pagination-bullet {
  width: 34px;
  height: 34px;
  text-align: center;
  line-height: 34px;
  font-size: 14px;
  color: #000;
  opacity: 1;
  background: rgba(0, 0, 0, 0.3);
}

.swiper-pagination-bullet-active {
  color: #fff;
  background: black;
}

/*======================================================
         CODEPEN STYLES - Remove this from your code
=======================================================*/
.swiper-docs {
  font-family: "Roboto", sans-serif;
}

.swiper-docs #docs h3 {
  margin-bottom: 0px;
  webkit-margin-after: 0em;
}

.swiper-docs #docs ol li:not(:first-of-type) {

  border-top: thin solid rgba(203, 202, 204, 1);
}

.swiper-docs #docs p {
  -webkit-margin-before: 1em;
  line-height: 22px;
  font-size: 0.9em;
}
.swiper-docs section #docs code {
  padding: 0;
  padding: 3px 5px;
  margin: 0;
  background: #f2f2f2;
  border-radius: 2px;
}

.swiper-docs #docs ol li {
  margin-bottom: 12px;
}
.swiper-docs {
  max-width: 960px;
  margin: 0px auto;
  padding: 15px;
}

.swiper-docs a {
  color: #4285f4;
}

styles

<link href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.css" rel="stylesheet" />
<link href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/default-skin/default-skin.min.css" rel="stylesheet" />
<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.3.5/css/swiper.min.css" rel="stylesheet" />

I moved these examples into Codepen to better explore this Gist https://codepen.io/bambii7/pen/mdOzame
Great work combining Swiper & Lightbox effect!