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public/libs/jquery.lazyloadxt.min.js

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/* Lazy Load XT 1.0.5 | MIT License */
!function(a,b,c,d){function e(a,b){return a[b]===d?t[b]:a[b]}function f(){var a=b.pageYOffset;return a===d?r.scrollTop:a}function g(a,b){var c=t["on"+a];c&&(w(c)?c.call(b[0]):(c.addClass&&b.addClass(c.addClass),c.removeClass&&b.removeClass(c.removeClass))),b.trigger("lazy"+a,[b]),k()}function h(b){g(b.type,a(this).off(p,h))}function i(c){if(A.length){c=c||t.forceLoad,B=1/0;var d,e,i=f(),j=b.innerHeight||r.clientHeight,k=b.innerWidth||r.clientWidth;for(d=0,e=A.length;e>d;d++){var l,m=A[d],o=m[0],q=m[n],s=!1,u=c;if(z(r,o)){if(c||!q.visibleOnly||o.offsetWidth||o.offsetHeight){if(!u){var v=o.getBoundingClientRect(),x=q.edgeX,y=q.edgeY;l=v.top+i-y-j,u=i>=l&&v.bottom>-y&&v.left<=k+x&&v.right>-x}if(u){g("show",m);var C=q.srcAttr,D=w(C)?C(m):o.getAttribute(C);D&&(m.on(p,h),o.src=D),s=!0}else B>l&&(B=l)}}else s=!0;s&&(A.splice(d--,1),e--)}e||g("complete",a(r))}}function j(){C>1?(C=1,i(),setTimeout(j,t.throttle)):C=0}function k(a){A.length&&(a&&"scroll"===a.type&&a.currentTarget===b&&B>=f()||(C||setTimeout(j,0),C=2))}function l(){v.lazyLoadXT()}function m(){i(!0)}var n="lazyLoadXT",o="lazied",p="load error",q="lazy-hidden",r=c.documentElement||c.body,s=b.onscroll===d||!!b.operamini||!r.getBoundingClientRect,t={autoInit:!0,selector:"img[data-src]",blankImage:"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",throttle:99,forceLoad:s,loadEvent:"pageshow",updateEvent:"load orientationchange resize scroll touchmove focus",forceEvent:"",oninit:{removeClass:"lazy"},onshow:{addClass:q},onload:{removeClass:q,addClass:"lazy-loaded"},onerror:{removeClass:q},checkDuplicates:!0},u={srcAttr:"data-src",edgeX:0,edgeY:0,visibleOnly:!0},v=a(b),w=a.isFunction,x=a.extend,y=a.data||function(b,c){return a(b).data(c)},z=a.contains||function(a,b){for(;b=b.parentNode;)if(b===a)return!0;return!1},A=[],B=0,C=0;a[n]=x(t,u,a[n]),a.fn[n]=function(c){c=c||{};var d,f=e(c,"blankImage"),h=e(c,"checkDuplicates"),i=e(c,"scrollContainer"),j={};a(i).on("scroll",k);for(d in u)j[d]=e(c,d);return this.each(function(d,e){if(e===b)a(t.selector).lazyLoadXT(c);else{if(h&&y(e,o))return;var i=a(e).data(o,1);f&&"IMG"===e.tagName&&!e.src&&(e.src=f),i[n]=x({},j),g("init",i),A.push(i)}})},a(c).ready(function(){g("start",v),v.on(t.loadEvent,l).on(t.updateEvent,k).on(t.forceEvent,m),a(c).on(t.updateEvent,k),t.autoInit&&l()})}(window.jQuery||window.Zepto||window.$,window,document);