lazyload.js

function PortalMangkir(){for(var e=document.getElementsByClassName("lazy"),t=0;t<e.length;t++)isInViewport(e[t])&&(e[t].src=e[t].getAttribute("data-src"))}function isInViewport(e){var t=e.getBoundingClientRect();return t.bottom>=0&&t.right>=0&&t.top<=(window.innerHeight||document.documentElement.clientHeight)&&t.left<=(window.innerWidth||document.documentElement.clientWidth)}function registerListener(e,t){window.addEventListener?window.addEventListener(e,t):window.attachEvent("on"+e,t)}registerListener("load",PortalMangkir),registerListener("scroll",PortalMangkir),document.addEventListener("DOMContentLoaded",function(){"use strict";for(var e=document.querySelectorAll("a"),t=e.length,n=/firefox|trident/i.test(navigator.userAgent)?document.documentElement:document.body,i=function(e,t,n,i){return(e/=i/2)<1?n/2*e*e*e+t:n/2*((e-=2)*e*e+2)+t};t--;)e.item(t).addEventListener("click",function(e){var t,o=n.scrollTop,r=document.getElementById(/[^#]+$/.exec(this.href)[0]).getBoundingClientRect().top,d=n.scrollHeight-window.innerHeight,a=d>o+r?r:d-o,c=900,s=function(e){t=t||e;var r=e-t,d=i(r,o,a,c);n.scrollTop=d,c>r&&requestAnimationFrame(s)};requestAnimationFrame(s),e.preventDefault()})});