jquery.pagevisibility.min.js

/*! jquery.pagevisibility v0.2.2 | (c) 2013 Daniel Herman | opensource.org/licenses/MIT */
!function(a){"function"==typeof define&&define.amd?define(["jquery"],a):a(jQuery)}(function(a){"use strict";var b,c,d,e,f,g,h,i;for(i=window.document,h=Object.defineProperty||a.noop,f=!1,c=["ms","moz","webkit",""];c.length;)if(b=c.pop(),g=b?b+"Hidden":"hidden",g in i){f=!0;break}if(f)b&&(a.event.special.visibilitychange={bindType:b+"visibilitychange"},h(i,"hidden",{get:function(){return i[g]}}),h(i,"visibilityState",{get:function(){return i[b+"VisibilityState"]}}));else{d=i.hidden=!1,e=i.visibilityState="visible";try{h(i,"hidden",{get:function(){return d},set:a.noop}),h(i,"visibilityState",{get:function(){return e},set:a.noop})}catch(j){}a(window).bind("focus blur",function(b){var c="blur"===b.type;d!==c&&(i.hidden=d=c,i.visibilityState=e=c?"hidden":"visible",a(i).trigger("visibilitychange"))})}});