lazy-load.min.js

'use strict';var images=document.querySelectorAll('.js-lazy-image'),config={rootMargin:'50px 0px',threshold:0.01},imageCount=images.length,observer;if(!('IntersectionObserver'in window))loadImagesImmediately(images);else{observer=new IntersectionObserver(onIntersection,config);for(var image,i=0;i<images.length;i++)(image=images[i],!image.classList.contains('js-lazy-image--handled'))&&observer.observe(image)}function fetchImage(a){return new Promise(function(b,c){var d=new Image;d.src=a,d.onload=b,d.onerror=c})}function preloadImage(a){var b=a.dataset.src;return b?fetchImage(b).then(function(){applyImage(a,b)}):void 0}function loadImagesImmediately(a){for(var d,b=Array.from(a),c=0;c<a.length;c++)d=a[c],preloadImage(d)}function disconnect(){observer&&observer.disconnect()}function onIntersection(a){0===imageCount&&observer.disconnect();for(var c,b=0;b<a.length;b++)c=a[b],0<c.intersectionRatio&&(imageCount--,observer.unobserve(c.target),preloadImage(c.target))}function applyImage(a,b){a.classList.add('js-lazy-image--handled'),a.src=b,a.classList.add('fade-in')}