rellax.min.js

(function(e,c){"function"===typeof define&&define.amd?define([],c):"object"===typeof module&&module.exports?module.exports=c():e.Rellax=c()})(this,function(){var e=function(c,l){var b=Object.create(e.prototype),g=0,k=0,d=[],p=!1,t=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.msRequestAnimationFrame||window.oRequestAnimationFrame||function(a){setTimeout(a,1E3/60)};b.options={speed:-2,center:!1};l&&Object.keys(l).forEach(function(a){b.options[a]=
l[a]});-10>b.options.speed?b.options.speed=-10:10<b.options.speed&&(b.options.speed=10);c||(c=".rellax");if(document.getElementsByClassName(c.replace(".","")))b.elems=document.getElementsByClassName(c.replace(".",""));else if(!1!==document.querySelector(c))b.elems=querySelector(c);else throw Error("The elements you're trying to select don't exist.");var u=function(a){var h=a.getAttribute("data-rellax-percentage")||b.options.center?document.body.scrollTop:0,c=h+a.getBoundingClientRect().top,d=a.clientHeight||
a.offsetHeight||a.scrollHeight,e=a.getAttribute("data-rellax-percentage")?a.getAttribute("data-rellax-percentage"):(h-c+k)/(d+k);b.options.center&&(e=.5);h=a.getAttribute("data-rellax-speed")?m(a.getAttribute("data-rellax-speed"),10):b.options.speed;if(a.getAttribute("data-rellax-percentage")||b.options.center)h=a.getAttribute("data-rellax-speed")?m(a.getAttribute("data-rellax-speed"),5):m(b.options.speed,5);e=Math.round(100*h*(1-e));a=a.style.cssText;var f="";if(0<=a.indexOf("transform"))var f=a.indexOf("transform"),
f=a.slice(f),g=f.indexOf(";"),f=g?" "+f.slice(11,g).replace(/\s/g,""):" "+f.slice(11).replace(/\s/g,"");return{base:e,top:c,height:d,speed:h,style:a,transform:f}},m=function(a,b){return a<-b?-b:a>b?b:a},q=function(){var a=g;g=void 0!==window.pageYOffset?window.pageYOffset:(document.documentElement||document.body.parentNode||document.body).scrollTop;return a!=g?!0:!1},r=function(){q()&&!1===p&&n();t(r)},n=function(){for(var a=0;a<b.elems.length;a++){var c=" translate3d(0,"+(Math.round(100*d[a].speed*
(1-(g-d[a].top+k)/(d[a].height+k)))-d[a].base)+"px,0)"+d[a].transform;b.elems[a].style.cssText=d[a].style+"-webkit-transform:"+c+";-moz-transform:"+c+";transform:"+c+";"}};b.destroy=function(){for(var a=0;a<b.elems.length;a++)b.elems[a].style.cssText=d[a].style;p=!0};(function(){k=window.innerHeight;q();for(var a=0;a<b.elems.length;a++){var c=u(b.elems[a]);d.push(c)}window.addEventListener("resize",function(){n()});r();n()})();return b};return e});