blazy.min.js

/*!
  hey, [be]Lazy.js - v1.6.2 - 2016.05.09
  A fast, small and dependency free lazy load script (https://github.com/dinbror/blazy)
  (c) Bjoern Klinggaard - @bklinggaard - http://dinbror.dk/blazy
*/
  (function(p,m){"function"===typeof define&&define.amd?define(m):"object"===typeof exports?module.exports=m():p.Blazy=m()})(this,function(){function p(b){var c=b._util;c.elements=B(b.options.selector);c.count=c.elements.length;c.destroyed&&(c.destroyed=!1,b.options.container&&k(b.options.container,function(a){n(a,"scroll",c.validateT)}),n(window,"resize",c.save_viewportOffsetT),n(window,"resize",c.validateT),n(window,"scroll",c.validateT));m(b)}function m(b){for(var c=b._util,a=0;a<c.count;a++){var d=c.elements[a],f=d.getBoundingClientRect();if(f.right>=e.left&&f.bottom>=e.top&&f.left<=e.right&&f.top<=e.bottom||q(d,b.options.successClass))b.load(d),c.elements.splice(a,1),c.count--,a--}0===c.count&&b.destroy()}function x(b,c,a){if(!q(b,a.successClass)&&(c||a.loadInvisible||0<b.offsetWidth&&0<b.offsetHeight))if(c=b.getAttribute(r)||b.getAttribute(a.src)){c=c.split(a.separator);var d=c[y&&1<c.length?1:0],f="img"===b.nodeName.toLowerCase();if(f||void 0===b.src){var l=new Image,u=function(){a.error&&a.error(b,"invalid");t(b,a.errorClass);g(l,"error",u);g(l,"load",h)},h=function(){if(f){b.src=d;v(b,"srcset",a.srcset);var c=b.parentNode;c&&"picture"===c.nodeName.toLowerCase()&&k(c.getElementsByTagName("source"),function(b){v(b,"srcset",a.srcset)})}else b.style.backgroundImage='url("'+d+'")';w(b,a);g(l,"load",h);g(l,"error",u)};n(l,"error",u);n(l,"load",h);l.src=d}else b.src=d,w(b,a)}else"video"===b.nodeName.toLowerCase()?(k(b.getElementsByTagName("source"),function(b){v(b,"src",a.src)}),b.load(),w(b,a)):(a.error&&a.error(b,"missing"),t(b,a.errorClass))}function w(b,c){t(b,c.successClass);c.success&&c.success(b);b.removeAttribute(c.src);k(c.breakpoints,function(a){b.removeAttribute(a.src)})}function v(b,c,a){var d=b.getAttribute(a);d&&(b[c]=d,b.removeAttribute(a))}function q(b,c){return-1!==(" "+b.className+" ").indexOf(" "+c+" ")}function t(b,c){q(b,c)||(b.className+=" "+c)}function B(b){var c=[];b=document.querySelectorAll(b);for(var a=b.length;a--;c.unshift(b[a]));return c}function z(b){e.bottom=(window.innerHeight||document.documentElement.clientHeight)+b;e.right=(window.innerWidth||document.documentElement.clientWidth)+b}function n(b,c,a){b.attachEvent?b.attachEvent&&b.attachEvent("on"+c,a):b.addEventListener(c,a,!1)}function g(b,c,a){b.detachEvent?b.detachEvent&&b.detachEvent("on"+c,a):b.removeEventListener(c,a,!1)}function k(b,c){if(b&&c)for(var a=b.length,d=0;d<a&&!1!==c(b[d],d);d++);}function A(b,c,a){var d=0;return function(){var f=+new Date;f-d<c||(d=f,b.apply(a,arguments))}}var r,e,y;return function(b){if(!document.querySelectorAll){var c=document.createStyleSheet();document.querySelectorAll=function(a,b,d,h,e){e=document.all;b=[];a=a.replace(/\[for\b/gi,"[htmlFor").split(",");for(d=a.length;d--;){c.addRule(a[d],"k:v");for(h=e.length;h--;)e[h].currentStyle.k&&b.push(e[h]);c.removeRule(0)}return b}}var a=this,d=a._util={};d.elements=[];d.destroyed=!0;a.options=b||{};a.options.error=a.options.error||!1;a.options.offset=a.options.offset||100;a.options.success=a.options.success||!1;a.options.selector=a.options.selector||".b-lazy";a.options.separator=a.options.separator||"|";a.options.container=a.options.container?document.querySelectorAll(a.options.container):!1;a.options.errorClass=a.options.errorClass||"b-error";a.options.breakpoints=a.options.breakpoints||!1;a.options.loadInvisible=a.options.loadInvisible||!1;a.options.successClass=a.options.successClass||"b-loaded";a.options.validateDelay=a.options.validateDelay||25;a.options.save_viewportOffsetDelay=a.options.save_viewportOffsetDelay||50;a.options.srcset=a.options.srcset||"data-srcset";a.options.src=r=a.options.src||"data-src";y=1<window.devicePixelRatio;e={};e.top=0-a.options.offset;e.left=0-a.options.offset;a.revalidate=function(){p(this)};a.load=function(a,b){var c=this.options;void 0===a.length?x(a,b,c):k(a,function(a){x(a,b,c)})};a.destroy=function(){var a=this._util;this.options.container&&k(this.options.container,function(b){g(b,"scroll",a.validateT)});g(window,"scroll",a.validateT);g(window,"resize",a.validateT);g(window,"resize",a.save_viewportOffsetT);a.count=0;a.elements.length=0;a.destroyed=!0};d.validateT=A(function(){m(a)},a.options.validateDelay,a);d.save_viewportOffsetT=A(function(){z(a.options.offset)},a.options.save_viewportOffsetDelay,a);z(a.options.offset);k(a.options.breakpoints,function(a){if(a.width>=window.screen.width)return r=a.src,!1});setTimeout(function(){p(a)})}});