Image Slder pro

<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

<div class="pswp__bg"></div>

<div class="pswp__scroll-wrap">

<div class="pswp__container">
            
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>

<div class="pswp__ui pswp__ui--hidden">

<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>

</div>
<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 >var openPhotoSwipe = function () {
    var pswpElement = document.querySelectorAll('.pswp')[0];

// build items array
    var items = [
    {
        src: 'https://farm2.staticflickr.com/1043/5186867718_06b2e9e551_b.jpg',
        w: 964,
        h: 1024 },

{
        src: 'https://farm7.staticflickr.com/6175/6176698785_7dee72237e_b.jpg',
        w: 1024,
        h: 683 }];

// define options (if needed)
    var options = {
        // history & focus options are disabled on CodePen        
        history: false,
        focus: false,

showAnimationDuration: 0,
        hideAnimationDuration: 0 };

var gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options);
    gallery.init();
};

openPhotoSwipe();

document.getElementById('btn').onclick = openPhotoSwipe;
//# sourceURL=pen.js
</script>