lazysizes
Version:
High performance (jankfree) lazy loader for images (including responsive images), iframes and scripts (widgets).
2 lines • 764 B
JavaScript
/*! lazysizes - v4.0.1 */
!function(a,b){var c=function(){b(a.lazySizes),a.removeEventListener("lazyunveilread",c,!0)};b=b.bind(null,a,a.document),"object"==typeof module&&module.exports?b(require("lazysizes")):a.lazySizes?c():a.addEventListener("lazyunveilread",c,!0)}(window,function(a,b,c){"use strict";var d,e;"srcset"in b.createElement("img")&&(d=/^img$/i,e=function(a){a.target.style.backgroundSize="",a.target.style.backgroundImage="",a.target.removeEventListener(a.type,e)},b.addEventListener("lazybeforeunveil",function(a){if(a.detail.instance==c){var b=a.target;if(d.test(b.nodeName)){var f=b.getAttribute("src");f&&(b.style.backgroundSize="100% 100%",b.style.backgroundImage="url("+f+")",b.removeAttribute("src"),b.addEventListener("load",e))}}},!1))});