【JavaScript】スワイプができるlightbox系プラグイン『PhotoSwipe』の実装サンプル集
- 2019.12.4
- JavaScript
スマホ、タブレットで、スワイプができるlightbox系プラグイン『PhotoSwipe』の使い方と、制作に役立つ実装サンプルをまとめてみました。
正直なところ、jQueryではないので実装するのは少々面倒といいますか手間がかかるといいますか。。
ですが、操作性、デザイン性、すべてにおいて素晴らしいので個人的にはとってもおすすめです。
スワイプで動かないのはちょっとイラってしますよねー
まさにモバイルファーストですねー
1. 機能をフルに使う
See the Pen
【JavaScript】スワイプができるlightbox系プラグイン『PhotoSwipe』サンプル（デフォルト） by 125naroom (@125naroom)
on CodePen.
HTMLとJavaScriptはこちら
HTML
<div class="ps_area photoswipe_gallery">
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" alt=""/>
<figure>sora 1</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" alt=""/>
<figure>sora 2</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" alt=""/>
<figure>sora 3</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" alt=""/>
<figure>sora 4</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" alt=""/>
<figure>sora 5</figure>
</a>
</div>
<!--モーダル用、置き場は自由ですが、フッター近くのほうがソースが綺麗かなと-->
<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>
JavaScript
// .photoswipe_gallery
(function() {
var initPhotoSwipeFromDOM = function(gallerySelector) {
var parseThumbnailElements = function(el) {
var thumbElements = el.childNodes,
numNodes = thumbElements.length,
items = [],
el,
childElements,
thumbnailEl,
size,
item;
for(var i = 0; i < numNodes; i++) {
el = thumbElements[i];
// include only element nodes
if(el.nodeType !== 1) {
continue;
}
childElements = el.children;
size = el.getAttribute('data-size').split('x');
// create slide object
item = {
src: el.getAttribute('href'),
w: parseInt(size[0], 10),
h: parseInt(size[1], 10),
author: el.getAttribute('data-author')
};
item.el = el; // save link to element for getThumbBoundsFn
if(childElements.length > 0) {
item.msrc = childElements[0].getAttribute('src'); // thumbnail url
if(childElements.length > 1) {
item.title = childElements[1].innerHTML; // caption (contents of figure)
}
}
var mediumSrc = el.getAttribute('data-med');
if(mediumSrc) {
size = el.getAttribute('data-med-size').split('x');
// "medium-sized" image
item.m = {
src: mediumSrc,
w: parseInt(size[0], 10),
h: parseInt(size[1], 10)
};
}
// original image
item.o = {
src: item.src,
w: item.w,
h: item.h
};
items.push(item);
}
return items;
};
// find nearest parent element
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 === 'A';
});
if(!clickedListItem) {
return;
}
var clickedGallery = clickedListItem.parentNode;
var 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) { // pid=1
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 = {
//ここからオプション追加
// showHideOpacity: true,
// bgOpacity: 1,
// spacing: 0.12,
// maxSpreadZoom: 2,
// loop: true,
// pinchToClose: true,
// closeOnScroll: true,
// closeOnVerticalDrag: true,
// preload: [1,1],
//ここまでオプション追加
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function(index) {
// See Options->getThumbBoundsFn section of docs for more info
var thumbnail = items[index].el.children[0],
pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
rect = thumbnail.getBoundingClientRect();
return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
},
addCaptionHTMLFn: function(item, captionEl, isFake) {
if(!item.title) {
captionEl.children[0].innerText = '';
return false;
}
captionEl.children[0].innerHTML = item.title + '<br/><small>Photo: ' + item.author + '</small>';
return true;
}
};
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 {
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);
// see: http://photoswipe.com/documentation/responsive-images.html
var realViewportWidth,
useLargeImages = false,
firstResize = true,
imageSrcWillChange;
gallery.listen('beforeResize', function() {
var dpiRatio = window.devicePixelRatio ? window.devicePixelRatio : 1;
dpiRatio = Math.min(dpiRatio, 2.5);
realViewportWidth = gallery.viewportSize.x * dpiRatio;
if(realViewportWidth >= 1200 || (!gallery.likelyTouchDevice && realViewportWidth > 800) || screen.width > 1200 ) {
if(!useLargeImages) {
useLargeImages = true;
imageSrcWillChange = true;
}
} else {
if(useLargeImages) {
useLargeImages = false;
imageSrcWillChange = true;
}
}
if(imageSrcWillChange && !firstResize) {
gallery.invalidateCurrItems();
}
if(firstResize) {
firstResize = false;
}
imageSrcWillChange = false;
});
gallery.listen('gettingData', function(index, item) {
if( useLargeImages ) {
item.src = item.o.src;
item.w = item.o.w;
item.h = item.o.h;
} else {
item.src = item.m.src;
item.w = item.m.w;
item.h = item.m.h;
}
});
gallery.init();
};
// select all gallery elements
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 );
}
};
initPhotoSwipeFromDOM('.photoswipe_gallery');
})();
2.『data-med』なし
See the Pen
【JavaScript】スワイプができるlightbox系プラグイン『PhotoSwipe』のサンプル、『data-med』なしのバージョン by 125naroom (@125naroom)
on CodePen.
HTMLとJavaScriptはこちら
HTML
<div class="ps_area_a photoswipe_gallery02">
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" alt=""></a>
<figcaption>sora 1</figcaption>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" alt=""></a>
<figcaption>sora 2</figcaption>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" alt=""></a>
<figcaption>sora 3</figcaption>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" alt=""></a>
<figcaption>sora 4</figcaption>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" alt=""></a>
<figcaption>sora 5</figcaption>
</figure>
</div>
<!--モーダル用、置き場は自由ですが、フッター近くのほうがソースが綺麗かなと-->
<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>
JavaScript
// .photoswipe_gallery02
(function() {
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('.photoswipe_gallery02');
})();
3.『data-med』なし、『キャプション』なし
See the Pen
【JavaScript】スワイプができるlightbox系プラグイン『PhotoSwipe』のサンプル、『data-med』なし、『キャプション』なしのバージョン by 125naroom (@125naroom)
on CodePen.
HTMLとJavaScriptはこちら
HTML
<div class="ps_area_a photoswipe_gallery02">
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" alt="sora 1"></a>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" alt="sora 2"></a>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" alt="sora 3"></a>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" alt="sora 4"></a>
</figure>
<figure>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" data-size="600x600"><img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" alt="sora 5"></a>
</figure>
</div>
<!--モーダル用、置き場は自由ですが、フッター近くのほうがソースが綺麗かなと-->
<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>
JavaScript
// .photoswipe_gallery02
(function() {
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('.photoswipe_gallery02');
})();
4. 複数ギャラリーだって可能です
See the Pen
【JavaScript】スワイプができるlightbox系プラグイン『PhotoSwipe』のサンプル、複数ギャラリー by 125naroom (@125naroom)
on CodePen.
HTMLとJavaScriptはこちら
HTML
<h3>ギャラリー01</h3>
<div class="ps_area photoswipe_gallery">
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora17.jpg" alt="">
<figure>sora 1</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora16.jpg" alt="">
<figure>sora 2</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora15.jpg" alt="">
<figure>sora 3</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora10.jpg" alt="">
<figure>sora 4</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora12.jpg" alt="">
<figure>sora 5</figure>
</a>
</div>
<h3>ギャラリー02</h3>
<div class="ps_area photoswipe_gallery">
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora01.jpg" alt="">
<figure>sora 1</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora02.jpg" alt="">
<figure>sora 2</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora03.jpg" alt="">
<figure>sora 3</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora04.jpg" alt="">
<figure>sora 4</figure>
</a>
<a href="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" data-size="600x600" data-med="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" data-med-size="600x600" data-author="125naroom">
<img src="https://125naroom.com/wp/wp-content/uploads/2015/02/sora05.jpg" alt="">
<figure>sora 5</figure>
</a>
</div>
<!--モーダル用、置き場は自由ですが、フッター近くのほうがソースが綺麗かなと-->
<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>
JavaScript
// .photoswipe_gallery
(function() {
var initPhotoSwipeFromDOM = function(gallerySelector) {
var parseThumbnailElements = function(el) {
var thumbElements = el.childNodes,
numNodes = thumbElements.length,
items = [],
el,
childElements,
thumbnailEl,
size,
item;
for(var i = 0; i < numNodes; i++) {
el = thumbElements[i];
// include only element nodes
if(el.nodeType !== 1) {
continue;
}
childElements = el.children;
size = el.getAttribute('data-size').split('x');
// create slide object
item = {
src: el.getAttribute('href'),
w: parseInt(size[0], 10),
h: parseInt(size[1], 10),
author: el.getAttribute('data-author')
};
item.el = el; // save link to element for getThumbBoundsFn
if(childElements.length > 0) {
item.msrc = childElements[0].getAttribute('src'); // thumbnail url
if(childElements.length > 1) {
item.title = childElements[1].innerHTML; // caption (contents of figure)
}
}
var mediumSrc = el.getAttribute('data-med');
if(mediumSrc) {
size = el.getAttribute('data-med-size').split('x');
// "medium-sized" image
item.m = {
src: mediumSrc,
w: parseInt(size[0], 10),
h: parseInt(size[1], 10)
};
}
// original image
item.o = {
src: item.src,
w: item.w,
h: item.h
};
items.push(item);
}
return items;
};
// find nearest parent element
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 === 'A';
});
if(!clickedListItem) {
return;
}
var clickedGallery = clickedListItem.parentNode;
var 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) { // pid=1
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 = {
//ここからオプション追加
// showHideOpacity: true,
// bgOpacity: 1,
// spacing: 0.12,
// maxSpreadZoom: 2,
// loop: true,
// pinchToClose: true,
// closeOnScroll: true,
// closeOnVerticalDrag: true,
// preload: [1,1],
//ここまでオプション追加
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function(index) {
// See Options->getThumbBoundsFn section of docs for more info
var thumbnail = items[index].el.children[0],
pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
rect = thumbnail.getBoundingClientRect();
return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
},
addCaptionHTMLFn: function(item, captionEl, isFake) {
if(!item.title) {
captionEl.children[0].innerText = '';
return false;
}
captionEl.children[0].innerHTML = item.title + '<br/><small>Photo: ' + item.author + '</small>';
return true;
}
};
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 {
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);
// see: http://photoswipe.com/documentation/responsive-images.html
var realViewportWidth,
useLargeImages = false,
firstResize = true,
imageSrcWillChange;
gallery.listen('beforeResize', function() {
var dpiRatio = window.devicePixelRatio ? window.devicePixelRatio : 1;
dpiRatio = Math.min(dpiRatio, 2.5);
realViewportWidth = gallery.viewportSize.x * dpiRatio;
if(realViewportWidth >= 1200 || (!gallery.likelyTouchDevice && realViewportWidth > 800) || screen.width > 1200 ) {
if(!useLargeImages) {
useLargeImages = true;
imageSrcWillChange = true;
}
} else {
if(useLargeImages) {
useLargeImages = false;
imageSrcWillChange = true;
}
}
if(imageSrcWillChange && !firstResize) {
gallery.invalidateCurrItems();
}
if(firstResize) {
firstResize = false;
}
imageSrcWillChange = false;
});
gallery.listen('gettingData', function(index, item) {
if( useLargeImages ) {
item.src = item.o.src;
item.w = item.o.w;
item.h = item.o.h;
} else {
item.src = item.m.src;
item.w = item.m.w;
item.h = item.m.h;
}
});
gallery.init();
};
// select all gallery elements
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 );
}
};
initPhotoSwipeFromDOM('.photoswipe_gallery');
})();
PhotoSwipeのダウンロード
まずはPhotoSwipeに必要なファイルをダウンロードします。
PhotoSwipeの使い方
ダウンロードファイルの中で必要なファイルは以下の4点です。
distフォルダに入っているかと思います。
- photoswipe.css
- default-skin.css
- photoswipe.min.js
- photoswipe-ui-default.min.js
HTML
<link rel="stylesheet" type="text/css" href="css/photoswipe.css"> <link rel="stylesheet" type="text/css" href="css/default-skin.css"> <script type="text/javascript" src="js/photoswipe.min.js"></script> <script type="text/javascript" src="js/photoswipe-ui-default.min.js"></script>
CDNを使う場合は、
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.css"> <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/default-skin/default-skin.min.css"> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe-ui-default.min.js"></script>
オプション設定
よく使うオプションをまとめました。
| オプション | 説明 | 初期値 |
|---|---|---|
| showHideOpacity | 設定するとアニメーション化されます（画像の不透明度は常に1です）。 | false |
| bgOpacity | 背景（.pswp__bg）の不透明度。0から1までの数字である必要があります。この値はいくつかのジェスチャーベースのトランジションに使用されるため、このスタイルはCSSではなくJSによって定義されます。 | 1 |
| spacing | スライドの間隔比。たとえば0.12、スライディングビューポート幅の12％としてレンダリングされます。 | false |
| maxSpreadZoom | スプレッド（ズーム）ジェスチャを実行するときの最大ズームレベル。2は、画像を元のサイズから2倍に拡大できることを意味します。ここで大きな値を使用しないようにしてください。画像が大きすぎると、モバイル（特にiOS）でメモリの問題が発生する可能性があります。 | 2 |
| loop | スワイプジェスチャーを使用するときにスライドをループします。設定すると、最後の画像から最初の画像にスワイプできます。 | true |
| pinchToClose | ギャラリーのジェスチャーを閉じるためにピンチします。ユーザーがズームアウトすると、ギャラリーの背景は徐々にフェードアウトします。ジェスチャーが完了すると、ギャラリーが閉じます。 | true |
| closeOnScroll | ページスクロールでギャラリーを閉じます。オプションは、ハードウェアタッチサポートのないデバイスでのみ機能します。 | true |
| closeOnVerticalDrag | 垂直方向にドラッグするとき、および画像がズームされないときは、ギャラリーを閉じます。 | true |
| preload | 動きの方向に基づいて近くのスライドの遅延読み込み。最初の1つ-現在のイメージの前にプリロードするアイテムの数、2つ目-現在のイメージの後の2つの整数を持つ配列でなければなりません。たとえば、[1,3]に設定すると、現在の画像の前に1つの画像が読み込まれ、現在の画像の後に3つの画像が読み込まれます。値は1未満にはできません。 | [1,1] |
下記ページにオプション内容と設定方法が詳細に載っています。英語ページですが日本語翻訳すれば問題ないかと思われます。
メモ
PhotoSwipeのことで何かわからないことがあればPhotoSwipe公式サイトがあるので一度チェックしてみるといろいろ解決できたりしますよ。
さいごに
スワイプ、タッチ、ジェスチャー
スマホ、タブレットでの操作性が素晴らしいですー
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