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HTML 

              
                <div class="container">
  
  <h1>Simple Image Gallery with magnific-popup.js</h1>
  
		<p><section class="img-gallery-magnific">
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/974/?random" title="9.jpg">
					<img src="https://unsplash.it/974/?random" alt="9.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/900/?random" title="10.jpg">
					<img src="https://unsplash.it/900/?random" alt="10.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/902" title="3.jpg">
					<img src="https://unsplash.it/902/" alt="3.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/901" title="4.jpg">
					<img src="https://unsplash.it/901" alt="4.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/888/?random" title="1.jpg">
					<img src="https://unsplash.it/888/?random" alt="1.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/931/?random" title="2.jpg">
					<img src="https://unsplash.it/931/?random" alt="2.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/908/?random" title="5.jpg">
					<img src="https://unsplash.it/908/?random" alt="5.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/978/?random" title="6.jpg">
					<img src="https://unsplash.it/978/?random" alt="6.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/857/?random" title="7.jpg">
					<img src="https://unsplash.it/857/?random" alt="7.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/905/?random" title="8.jpg">
					<img src="https://unsplash.it/905/?random" alt="8.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/1230/?random" title="12.jpg">
					<img src="https://unsplash.it/1230/?random" alt="12.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/800/?random" title="13.jpg">
					<img src="https://unsplash.it/800/?random" alt="13.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/930/?random" title="14.jpg">
					<img src="https://unsplash.it/930/?random" alt="14.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/999/?random" title="15.jpg">
					<img src="https://unsplash.it/999/?random" alt="15.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
			<div class="magnific-img">
				<a class="image-popup-vertical-fit" href="https://unsplash.it/897/?random" title="16.jpg">
					<img src="https://unsplash.it/897/?random" alt="16.jpg" />
					<i class="fa fa-search-plus" aria-hidden="true"></i>
				</a>
			</div>
		</section>
		<div class="clear"></div>
	</p>

</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Abel');
h1{
  font-family: 'Abel', sans-serif;
  font-weight:100;
  font-size: 40px;
  text-align:center;
}
.container{
  width:80%;
  margin:0 auto;
}

a{
	outline: 0 !important;
}
.magnific-img img {
    width: 100%;
    height: auto;
}
.mfp-bottom-bar,*{
   font-family: 'Abel', sans-serif;
}
.magnific-img {
    display: inline-block;
    width: 32.3%;
}
a.image-popup-vertical-fit {
    cursor: -webkit-zoom-in;
}
.mfp-with-zoom .mfp-container,
.mfp-with-zoom.mfp-bg {
  opacity: 0;
  -webkit-backface-visibility: hidden;
  /* ideally, transition speed should match zoom duration */
  -webkit-transition: all 0.3s ease-out;
  -moz-transition: all 0.3s ease-out;
  -o-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;
}

.mfp-with-zoom.mfp-ready .mfp-container {
    opacity: 1;
}
.mfp-with-zoom.mfp-ready.mfp-bg {
    opacity: 0.98;
}

.mfp-with-zoom.mfp-removing .mfp-container,
.mfp-with-zoom.mfp-removing.mfp-bg {
  opacity: 0;
}
.mfp-arrow-left:before {
    border-right: none !important;
}
.mfp-arrow-right:before {
    border-left: none !important;
}
button.mfp-arrow, .mfp-counter {
    opacity: 0 !important;
    transition: opacity 200ms ease-in, opacity 2000ms ease-out;
}
.mfp-container:hover button.mfp-arrow, .mfp-container:hover .mfp-counter{
	opacity: 1 !important;
}


/* Magnific Popup CSS */
.mfp-bg {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1042;
  overflow: hidden;
  position: fixed;
  background: #0b0b0b;
  opacity: 0.8; }

.mfp-wrap {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1043;
  position: fixed;
  outline: none !important;
  -webkit-backface-visibility: hidden; }

.mfp-container {
  text-align: center;
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  padding: 0 8px;
  box-sizing: border-box; }

.mfp-container:before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle; }

.mfp-align-top .mfp-container:before {
  display: none; }

.mfp-content {
  position: relative;
  display: inline-block;
  vertical-align: middle;
  margin: 0 auto;
  text-align: left;
  z-index: 1045; }

.mfp-inline-holder .mfp-content,
.mfp-ajax-holder .mfp-content {
  width: 100%;
  cursor: auto; }

.mfp-ajax-cur {
  cursor: progress; }

.mfp-zoom-out-cur, .mfp-zoom-out-cur .mfp-image-holder .mfp-close {
  cursor: -moz-zoom-out;
  cursor: -webkit-zoom-out;
  cursor: zoom-out; }

.mfp-zoom {
  cursor: pointer;
  cursor: -webkit-zoom-in;
  cursor: -moz-zoom-in;
  cursor: zoom-in; }

.mfp-auto-cursor .mfp-content {
  cursor: auto; }

.mfp-close,
.mfp-arrow,
.mfp-preloader,
.mfp-counter {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none; }

.mfp-loading.mfp-figure {
  display: none; }

.mfp-hide {
  display: none !important; }

.mfp-preloader {
  color: #CCC;
  position: absolute;
  top: 50%;
  width: auto;
  text-align: center;
  margin-top: -0.8em;
  left: 8px;
  right: 8px;
  z-index: 1044; }
  .mfp-preloader a {
    color: #CCC; }
    .mfp-preloader a:hover {
      color: #FFF; }

.mfp-s-ready .mfp-preloader {
  display: none; }

.mfp-s-error .mfp-content {
  display: none; }

button.mfp-close,
button.mfp-arrow {
  overflow: visible;
  cursor: pointer;
  background: transparent;
  border: 0;
  -webkit-appearance: none;
  display: block;
  outline: none;
  padding: 0;
  z-index: 1046;
  box-shadow: none;
  touch-action: manipulation; }

button::-moz-focus-inner {
  padding: 0;
  border: 0; }

.mfp-close {
  width: 44px;
  height: 44px;
  line-height: 44px;
  position: absolute;
  right: 0;
  top: 0;
  text-decoration: none;
  text-align: center;
  opacity: 0.65;
  padding: 0 0 18px 10px;
  color: #FFF;
  font-style: normal;
  font-size: 28px;
  font-family: Arial, Baskerville, monospace; }
  .mfp-close:hover,
  .mfp-close:focus {
    opacity: 1; }
  .mfp-close:active {
    top: 1px; }

.mfp-close-btn-in .mfp-close {
  color: #333; }

.mfp-image-holder .mfp-close,
.mfp-iframe-holder .mfp-close {
  color: #FFF;
  right: -6px;
  text-align: right;
  padding-right: 6px;
  width: 100%; }

.mfp-counter {
  position: absolute;
  top: 0;
  right: 0;
  color: #CCC;
  font-size: 12px;
  line-height: 18px;
  white-space: nowrap; }

.mfp-arrow {
  position: absolute;
  opacity: 0.65;
  margin: 0;
  top: 50%;
  margin-top: -55px;
  padding: 0;
  width: 90px;
  height: 110px;
  -webkit-tap-highlight-color: transparent; }
  .mfp-arrow:active {
    margin-top: -54px; }
  .mfp-arrow:hover,
  .mfp-arrow:focus {
    opacity: 1; }
  .mfp-arrow:before,
  .mfp-arrow:after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 0;
    top: 0;
    margin-top: 35px;
    margin-left: 35px;
    border: medium inset transparent; }
  .mfp-arrow:after {
    border-top-width: 13px;
    border-bottom-width: 13px;
    top: 8px; }
  .mfp-arrow:before {
    border-top-width: 21px;
    border-bottom-width: 21px;
    opacity: 0.7; }

.mfp-arrow-left {
  left: 0; }
  .mfp-arrow-left:after {
    border-right: 17px solid #FFF;
    margin-left: 31px; }
  .mfp-arrow-left:before {
    margin-left: 25px;
    border-right: 27px solid #3F3F3F; }

.mfp-arrow-right {
  right: 0; }
  .mfp-arrow-right:after {
    border-left: 17px solid #FFF;
    margin-left: 39px; }
  .mfp-arrow-right:before {
    border-left: 27px solid #3F3F3F; }

.mfp-iframe-holder {
  padding-top: 40px;
  padding-bottom: 40px; }
  .mfp-iframe-holder .mfp-content {
    line-height: 0;
    width: 100%;
    max-width: 900px; }
  .mfp-iframe-holder .mfp-close {
    top: -40px; }

.mfp-iframe-scaler {
  width: 100%;
  height: 0;
  overflow: hidden;
  padding-top: 56.25%; }
  .mfp-iframe-scaler iframe {
    position: absolute;
    display: block;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.6);
    background: #000; }

/* Main image in popup */
img.mfp-img {
  width: auto;
  max-width: 100%;
  height: auto;
  display: block;
  line-height: 0;
  box-sizing: border-box;
  padding: 40px 0 40px;
  margin: 0 auto; }

/* The shadow behind the image */
.mfp-figure {
  line-height: 0; }
  .mfp-figure:after {
    content: '';
    position: absolute;
    left: 0;
    top: 40px;
    bottom: 40px;
    display: block;
    right: 0;
    width: auto;
    height: auto;
    z-index: -1;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.6);
    background: #444; }
  .mfp-figure small {
    color: #BDBDBD;
    display: block;
    font-size: 12px;
    line-height: 14px; }
  .mfp-figure figure {
    margin: 0; }

.mfp-bottom-bar {
  margin-top: -36px;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  cursor: auto; }

.mfp-title {
  text-align: left;
  line-height: 18px;
  color: #F3F3F3;
  word-wrap: break-word;
  padding-right: 36px; }

.mfp-image-holder .mfp-content {
  max-width: 100%; }

.mfp-gallery .mfp-image-holder .mfp-figure {
  cursor: pointer; }

@media screen and (max-width: 800px) and (orientation: landscape), screen and (max-height: 300px) {
  /**
       * Remove all paddings around the image on small screen
       */
  .mfp-img-mobile .mfp-image-holder {
    padding-left: 0;
    padding-right: 0; }
  .mfp-img-mobile img.mfp-img {
    padding: 0; }
  .mfp-img-mobile .mfp-figure:after {
    top: 0;
    bottom: 0; }
  .mfp-img-mobile .mfp-figure small {
    display: inline;
    margin-left: 5px; }
  .mfp-img-mobile .mfp-bottom-bar {
    background: rgba(0, 0, 0, 0.6);
    bottom: 0;
    margin: 0;
    top: auto;
    padding: 3px 5px;
    position: fixed;
    box-sizing: border-box; }
    .mfp-img-mobile .mfp-bottom-bar:empty {
      padding: 0; }
  .mfp-img-mobile .mfp-counter {
    right: 5px;
    top: 3px; }
  .mfp-img-mobile .mfp-close {
    top: 0;
    right: 0;
    width: 35px;
    height: 35px;
    line-height: 35px;
    background: rgba(0, 0, 0, 0.6);
    position: fixed;
    text-align: center;
    padding: 0; } }

@media all and (max-width: 900px) {
  .mfp-arrow {
    -webkit-transform: scale(0.75);
    transform: scale(0.75); }
  .mfp-arrow-left {
    -webkit-transform-origin: 0;
    transform-origin: 0; }
  .mfp-arrow-right {
    -webkit-transform-origin: 100%;
    transform-origin: 100%; }
  .mfp-container {
    padding-left: 6px;
    padding-right: 6px; } }
!

JS 

              
                $(document).ready(function(){
$('.image-popup-vertical-fit').magnificPopup({
	type: 'image',
  mainClass: 'mfp-with-zoom', 
  gallery:{
			enabled:true
		},

  zoom: {
    enabled: true, 

    duration: 300, // duration of the effect, in milliseconds
    easing: 'ease-in-out', // CSS transition easing function

    opener: function(openerElement) {

      return openerElement.is('img') ? openerElement : openerElement.find('img');
  }
}

});

});
!
999px

Console