PhotoSwipe는 간단하면서도 강력한 JavaScript 갤러리 라이브러리로, 모바일과 데스크탑 모두에서 터치 제스처를 지원하는 이미지 갤러리를 구현할 수 있습니다. 이 라이브러리는 성능을 최적화하기 위해 CSS3를 활용하며, 모듈러 구조로 되어 있어 필요한 기능만 선택적으로 사용할 수 있습니다.
📄 HTML
<div class='my-gallery' itemscope itemtype='http://schema.org/ImageGallery'>
<figure itemprop='associatedMedia' itemscope itemtype='http://schema.org/ImageObject'>
<a href='https://placekitten.com/800/600' itemprop='contentUrl' data-size='800x600'>
<img src='https://placekitten.com/200/150' itemprop='thumbnail' alt='Image description' />
</a>
<figcaption itemprop='caption description'>Sample image 1</figcaption>
</figure>
</div>
<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__top-bar'>
<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>
<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>
🎨 External CSS
<link href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.3/photoswipe.css" rel="stylesheet">
<link href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.3/default-skin/default-skin.css" rel="stylesheet">
🧩 External JS
<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.3/photoswipe.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.3/photoswipe-ui-default.min.js"></script>
⚙️ JavaScript
document.addEventListener('DOMContentLoaded', function() {
var initPhotoSwipeFromDOM = function(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];
if(figureEl.nodeType !== 1) {
continue;
}
linkEl = figureEl.children[0];
size = linkEl.getAttribute('data-size').split('x');
item = {
src: linkEl.getAttribute('href'),
w: parseInt(size[0], 10),
h: parseInt(size[1], 10)
};
if(figureEl.children.length > 1) {
item.title = figureEl.children[1].innerHTML;
}
if(linkEl.children.length > 0) {
item.msrc = linkEl.children[0].getAttribute('src');
}
item.el = figureEl;
items.push(item);
}
return items;
};
var closest = function closest(el, fn) {
return el && (fn(el) ? el : closest(el.parentNode, fn));
};
var onThumbnailsClick = function(e) {
e = e || window.event;
e.preventDefault ? e.preventDefault() : e.returnValue = false;
var eTarget = e.target || e.srcElement;
var clickedListItem = closest(eTarget, function(el) {
return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
});
if(!clickedListItem) {
return;
}
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) {
openPhotoSwipe(index, clickedGallery);
}
return false;
};
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);
options = {
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function(index) {
var thumbnail = items[index].el.getElementsByTagName('img')[0],
pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
rect = thumbnail.getBoundingClientRect();
return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
}
};
if(fromURL) {
if(options.galleryPIDs) {
for(var j = 0; j < items.length; j++) {
if(items[j].pid == index) {
options.index = j;
break;
}
}
} else {
options.index = parseInt(index, 10) - 1;
}
} else {
options.index = parseInt(index, 10);
}
if( isNaN(options.index) ) {
return;
}
if(disableAnimation) {
options.showAnimationDuration = 0;
}
gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
gallery.init();
};
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;
}
var hashData = photoswipeParseHash();
if(hashData.pid && hashData.gid) {
openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1], true, true);
}
};
initPhotoSwipeFromDOM('.my-gallery');
});
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