Modificare il file: \appsresources\snowfall.js

/* Snowfall pure js ==================================================================== LICENSE ==================================================================== Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ==================================================================== */ Date.now||(Date.now=function(){return(new Date).getTime()}),function(){"use strict";for(var e=["webkit","moz"],t=0;t<e.length&&!window.requestAnimationFrame;++t){var i=e[t];window.requestAnimationFrame=window[i+"RequestAnimationFrame"],window.cancelAnimationFrame=window[i+"CancelAnimationFrame"]||window[i+"CancelRequestAnimationFrame"]}if(/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent)||!window.requestAnimationFrame||!window.cancelAnimationFrame){var n=0;window.requestAnimationFrame=function(e){var t=Date.now(),i=Math.max(n+16,t);return setTimeout(function(){e(n=i)},i-t)},window.cancelAnimationFrame=clearTimeout}}();var snowFall=function(){function e(){var e={flakeCount:35,flakeColor:"#ffffff",flakeIndex:999999,flakePosition:"absolute",minSize:1,maxSize:2,minSpeed:1,maxSpeed:5,round:!1,shadow:!1,collection:!1,image:!1,collectionHeight:40},t=[],n={},o=0,s=0,a=0,r=0,l=function(e,t){for(var i in t)e.hasOwnProperty(i)&&(e[i]=t[i])},h=function(e,t){e.style.webkitTransform=t,e.style.MozTransform=t,e.style.msTransform=t,e.style.OTransform=t,e.style.transform=t},m=function(e,t){return Math.round(e+Math.random()*(t-e))},f=function(e,t){for(var i in t)e.style[i]=t[i]+("width"==i||"height"==i?"px":"")},d=function(t,i,n){this.x=m(a,s-a),this.y=m(0,o),this.size=i,this.speed=n,this.step=0,this.stepSize=m(1,10)/100,e.collection&&(this.target=canvasCollection[m(0,canvasCollection.length-1)]);var r=null;e.image?(r=new Image,r.src=e.image):(r=document.createElement("div"),f(r,{background:e.flakeColor})),r.className="snowfall-flakes",f(r,{width:this.size,height:this.size,position:e.flakePosition,top:0,left:0,"will-change":"transform",fontSize:0,zIndex:e.flakeIndex}),e.round&&f(r,{"-moz-border-radius":~~e.maxSize+"px","-webkit-border-radius":~~e.maxSize+"px",borderRadius:~~e.maxSize+"px"}),e.shadow&&f(r,{"-moz-box-shadow":"1px 1px 1px #555","-webkit-box-shadow":"1px 1px 1px #555",boxShadow:"1px 1px 1px #555"}),t.tagName===document.body.tagName?document.body.appendChild(r):t.appendChild(r),this.element=r,this.update=function(){this.y+=this.speed,this.y>o-(this.size+6)&&this.reset(),h(this.element,"translateY("+this.y+"px) translateX("+this.x+"px)"),this.step+=this.stepSize,this.x+=Math.cos(this.step),(this.x+this.size>s-a||this.x<a)&&this.reset()},this.reset=function(){this.y=0,this.x=m(a,s-a),this.stepSize=m(1,10)/100,this.size=m(100*e.minSize,100*e.maxSize)/100,this.element.style.width=this.size+"px",this.element.style.height=this.size+"px",this.speed=m(e.minSpeed,e.maxSpeed)}},w=function(){for(var e=0;e<t.length;e+=1)t[e].update();r=requestAnimationFrame(function(){w()})};return{snow:function(r,h){for(l(e,h),n=r,o=n.offsetHeight,s=n.offsetWidth,n.snow=this,"body"===n.tagName.toLowerCase()&&(a=25),window.addEventListener("resize",function(){o=n.clientHeight,s=n.offsetWidth},!0),i=0;i<e.flakeCount;i+=1)t.push(new d(n,m(100*e.minSize,100*e.maxSize)/100,m(e.minSpeed,e.maxSpeed)));w()},clear:function(){var e=null;e=n.getElementsByClassName?n.getElementsByClassName("snowfall-flakes"):n.querySelectorAll(".snowfall-flakes");for(var t=e.length;t--;)e[t].parentNode===n&&n.removeChild(e[t]);cancelAnimationFrame(r)}}}return{snow:function(t,i){if("string"==typeof i)if(t.length>0)for(var n=0;n<t.length;n++)t[n].snow&&t[n].snow.clear();else t.snow.clear();else if(t.length>0)for(var n=0;n<t.length;n++)(new e).snow(t[n],i);else(new e).snow(t,i)}}}();

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