La temporada navide?a ya es oficial, y al menos los que estamos en el hemisferio norte relacionamos la nieve con la Navidad, as? que es hora de abrigarnos porque haremos que caiga nieve en el blog.
En esta ocasi?n usaremos un script de Schillmania que har? que caigan unos finos copos de nieve en el blog y que se ir?n acumulando al final de la p?gina. Adem?s, la tormenta de nieve se mueve en direcci?n contraria al cursor, por lo que si movemos el cursor a la derecha entonces la nieve caer? desde la izquierda y viceversa.
Puedes ver un ejemplo en este blog de pruebas.
Para no complicarnos descargando y subiendo archivos, pegaremos el script directo en un gadget, as? podr?s quitar la nieve del blog cuando quieras con s?lo eliminar el gadget.
Si usas la interfaz antigua entra en Dise?o | Elementos de la p?gina | A?adir un gadget | HTML/Javascript.
Si usas la nueva interfaz entra en Dise?o | A?adir un gadget | HTML/Javascript.
Ah? dentro del gadget pega el siguiente c?digo:
<script type="text/javascript">
//<![CDATA[
// Nieve en el blog
/** @license
DHTML Snowstorm! JavaScript-based Snow for web pages
--------------------------------------------------------
Version 1.42.20111120 (Previous rev: 1.41.20101113)
Copyright (c) 2007, Scott Schiller. All rights reserved.
Code provided under the BSD License:
http://schillmania.com/projects/snowstorm/license.txt
*/
var snowStorm=function(e,d){function g(a,d){isNaN(d)&&(d=0);return Math.random()*a+d}function o(){e.setTimeout(function(){a.start(true)},20);a.events.remove(i?d:e,"mousemove",o)}function r(){if(!a.excludeMobile||!s)a.freezeOnBlur?a.events.add(i?d:e,"mousemove",o):o();a.events.remove(e,"load",r)}this.flakesMax=128;this.flakesMaxActive=64;this.animationInterval=40;this.excludeMobile=true;this.flakeBottom=null;this.followMouse=true;this.snowColor="#ffffff";this.snowCharacter="•";this.snowStick=true;
this.targetElement=null;this.useMeltEffect=true;this.usePositionFixed=this.useTwinkleEffect=false;this.freezeOnBlur=true;this.flakeRightOffset=this.flakeLeftOffset=0;this.flakeHeight=this.flakeWidth=8;this.vMaxX=5;this.vMaxY=4;this.zIndex=0;var a=this,y=this,i=navigator.userAgent.match(/msie/i),z=navigator.userAgent.match(/msie 6/i),A=navigator.appVersion.match(/windows 98/i),s=navigator.userAgent.match(/mobile/i),B=i&&d.compatMode==="BackCompat",t=s||B||z,h=null,k=null,j=null,m=null,u=null,v=null,
p=1,n=false,q;a:{try{d.createElement("div").style.opacity="0.5"}catch(C){q=false;break a}q=true}var w=false,x=d.createDocumentFragment();this.timers=[];this.flakes=[];this.active=this.disabled=false;this.meltFrameCount=20;this.meltFrames=[];this.events=function(){function a(b){var b=f.call(b),c=b.length;l?(b[1]="on"+b[1],c>3&&b.pop()):c===3&&b.push(false);return b}function d(a,c){var e=a.shift(),f=[b[c]];if(l)e[f](a[0],a[1]);else e[f].apply(e,a)}var l=!e.addEventListener&&e.attachEvent,f=Array.prototype.slice,
b={add:l?"attachEvent":"addEventListener",remove:l?"detachEvent":"removeEventListener"};return{add:function(){d(a(arguments),"add")},remove:function(){d(a(arguments),"remove")}}}();this.randomizeWind=function(){var c;c=g(a.vMaxX,0.2);u=parseInt(g(2),10)===1?c*-1:c;v=g(a.vMaxY,0.2);if(this.flakes)for(c=0;c<this.flakes.length;c++)this.flakes[c].active&&this.flakes[c].setVelocities()};this.scrollHandler=function(){var c;m=a.flakeBottom?0:parseInt(e.scrollY||d.documentElement.scrollTop||d.body.scrollTop,
10);isNaN(m)&&(m=0);if(!n&&!a.flakeBottom&&a.flakes)for(c=a.flakes.length;c--;)a.flakes[c].active===0&&a.flakes[c].stick()};this.resizeHandler=function(){e.innerWidth||e.innerHeight?(h=e.innerWidth-(!i?16:16)-a.flakeRightOffset,j=a.flakeBottom?a.flakeBottom:e.innerHeight):(h=(d.documentElement.clientWidth||d.body.clientWidth||d.body.scrollWidth)-(!i?8:0)-a.flakeRightOffset,j=a.flakeBottom?a.flakeBottom:d.documentElement.clientHeight||d.body.clientHeight||d.body.scrollHeight);k=parseInt(h/2,10)};this.resizeHandlerAlt=
function(){h=a.targetElement.offsetLeft+a.targetElement.offsetWidth-a.flakeRightOffset;j=a.flakeBottom?a.flakeBottom:a.targetElement.offsetTop+a.targetElement.offsetHeight;k=parseInt(h/2,10)};this.freeze=function(){var c;if(a.disabled)return false;else a.disabled=1;for(c=a.timers.length;c--;)clearInterval(a.timers[c])};this.resume=function(){if(a.disabled)a.disabled=0;else return false;a.timerInit()};this.toggleSnow=function(){a.flakes.length?(a.active=!a.active,a.active?(a.show(),a.resume()):(a.stop(),
a.freeze())):a.start()};this.stop=function(){var c;this.freeze();for(c=this.flakes.length;c--;)this.flakes[c].o.style.display="none";a.events.remove(e,"scroll",a.scrollHandler);a.events.remove(e,"resize",a.resizeHandler);a.freezeOnBlur&&(i?(a.events.remove(d,"focusout",a.freeze),a.events.remove(d,"focusin",a.resume)):(a.events.remove(e,"blur",a.freeze),a.events.remove(e,"focus",a.resume)))};this.show=function(){var a;for(a=this.flakes.length;a--;)this.flakes[a].o.style.display="block"};this.SnowFlake=
function(a,e,l,f){var b=this;this.type=e;this.x=l||parseInt(g(h-20),10);this.y=!isNaN(f)?f:-g(j)-12;this.vY=this.vX=null;this.vAmpTypes=[1,1.2,1.4,1.6,1.8];this.vAmp=this.vAmpTypes[this.type];this.melting=false;this.meltFrameCount=a.meltFrameCount;this.meltFrames=a.meltFrames;this.twinkleFrame=this.meltFrame=0;this.active=1;this.fontSize=10+this.type/5*10;this.o=d.createElement("div");this.o.innerHTML=a.snowCharacter;this.o.style.color=a.snowColor;this.o.style.position=n?"fixed":"absolute";this.o.style.width=
a.flakeWidth+"px";this.o.style.height=a.flakeHeight+"px";this.o.style.fontFamily="arial,verdana";this.o.style.overflow="hidden";this.o.style.fontWeight="normal";this.o.style.zIndex=a.zIndex;x.appendChild(this.o);this.refresh=function(){if(isNaN(b.x)||isNaN(b.y))return false;b.o.style.left=b.x+"px";b.o.style.top=b.y+"px"};this.stick=function(){t||a.targetElement!==d.documentElement&&a.targetElement!==d.body?b.o.style.top=j+m-a.flakeHeight+"px":a.flakeBottom?b.o.style.top=a.flakeBottom+"px":(b.o.style.display=
"none",b.o.style.top="auto",b.o.style.bottom="0px",b.o.style.position="fixed",b.o.style.display="block")};this.vCheck=function(){if(b.vX>=0&&b.vX<0.2)b.vX=0.2;else if(b.vX<0&&b.vX>-0.2)b.vX=-0.2;if(b.vY>=0&&b.vY<0.2)b.vY=0.2};this.move=function(){var d=b.vX*p;b.x+=d;b.y+=b.vY*b.vAmp;if(b.x>=h||h-b.x<a.flakeWidth)b.x=0;else if(d<0&&b.x-a.flakeLeftOffset<-a.flakeWidth)b.x=h-a.flakeWidth-1;b.refresh();if(j+m-b.y<a.flakeHeight)b.active=0,a.snowStick?b.stick():b.recycle();else{if(a.useMeltEffect&&b.active&&
b.type<3&&!b.melting&&Math.random()>0.998)b.melting=true,b.melt();if(a.useTwinkleEffect)if(b.twinkleFrame)b.twinkleFrame--,b.o.style.visibility=b.twinkleFrame&&b.twinkleFrame%2===0?"hidden":"visible";else if(Math.random()>0.9)b.twinkleFrame=parseInt(Math.random()*20,10)}};this.animate=function(){b.move()};this.setVelocities=function(){b.vX=u+g(a.vMaxX*0.12,0.1);b.vY=v+g(a.vMaxY*0.12,0.1)};this.setOpacity=function(a,b){if(!q)return false;a.style.opacity=b};this.melt=function(){!a.useMeltEffect||!b.melting?
b.recycle():b.meltFrame<b.meltFrameCount?(b.meltFrame++,b.setOpacity(b.o,b.meltFrames[b.meltFrame]),b.o.style.fontSize=b.fontSize-b.fontSize*(b.meltFrame/b.meltFrameCount)+"px",b.o.style.lineHeight=a.flakeHeight+2+a.flakeHeight*0.75*(b.meltFrame/b.meltFrameCount)+"px"):b.recycle()};this.recycle=function(){b.o.style.display="none";b.o.style.position=n?"fixed":"absolute";b.o.style.bottom="auto";b.setVelocities();b.vCheck();b.meltFrame=0;b.melting=false;b.setOpacity(b.o,1);b.o.style.padding="0px";b.o.style.margin=
"0px";b.o.style.fontSize=b.fontSize+"px";b.o.style.lineHeight=a.flakeHeight+2+"px";b.o.style.textAlign="center";b.o.style.verticalAlign="baseline";b.x=parseInt(g(h-a.flakeWidth-20),10);b.y=parseInt(g(j)*-1,10)-a.flakeHeight;b.refresh();b.o.style.display="block";b.active=1};this.recycle();this.refresh()};this.snow=function(){for(var c=0,d=0,e=0,f=null,f=a.flakes.length;f--;)a.flakes[f].active===1?(a.flakes[f].move(),c++):a.flakes[f].active===0?d++:e++,a.flakes[f].melting&&a.flakes[f].melt();if(c<a.flakesMaxActive&&
(f=a.flakes[parseInt(g(a.flakes.length),10)],f.active===0))f.melting=true};this.mouseMove=function(c){if(!a.followMouse)return true;c=parseInt(c.clientX,10);c<k?p=-2+c/k*2:(c-=k,p=c/k*2)};this.createSnow=function(c,d){var e;for(e=0;e<c;e++)if(a.flakes[a.flakes.length]=new a.SnowFlake(a,parseInt(g(6),10)),d||e>a.flakesMaxActive)a.flakes[a.flakes.length-1].active=-1;y.targetElement.appendChild(x)};this.timerInit=function(){a.timers=!A?[setInterval(a.snow,a.animationInterval)]:[setInterval(a.snow,a.animationInterval*
3),setInterval(a.snow,a.animationInterval)]};this.init=function(){var c;for(c=0;c<a.meltFrameCount;c++)a.meltFrames.push(1-c/a.meltFrameCount);a.randomizeWind();a.createSnow(a.flakesMax);a.events.add(e,"resize",a.resizeHandler);a.events.add(e,"scroll",a.scrollHandler);a.freezeOnBlur&&(i?(a.events.add(d,"focusout",a.freeze),a.events.add(d,"focusin",a.resume)):(a.events.add(e,"blur",a.freeze),a.events.add(e,"focus",a.resume)));a.resizeHandler();a.scrollHandler();a.followMouse&&a.events.add(i?d:e,"mousemove",
a.mouseMove);a.animationInterval=Math.max(20,a.animationInterval);a.timerInit()};this.start=function(c){if(w){if(c)return true}else w=true;if(typeof a.targetElement==="string"&&(c=a.targetElement,a.targetElement=d.getElementById(c),!a.targetElement))throw Error('Snowstorm: Unable to get targetElement "'+c+'"');if(!a.targetElement)a.targetElement=!i?d.documentElement?d.documentElement:d.body:d.body;if(a.targetElement!==d.documentElement&&a.targetElement!==d.body)a.resizeHandler=a.resizeHandlerAlt;
a.resizeHandler();a.usePositionFixed=a.usePositionFixed&&!t;n=a.usePositionFixed;if(h&&j&&!a.disabled)a.init(),a.active=true};a.events.add(e,"load",r,false);return this}(window,document);
//]]>
</script>
Guarda los cambios y a aguantarse el fr?o virtual.
El n?mero 40 es la velocidad en la que cae la nieve, con un valor m?s bajo caer? m?s r?pida y con uno m?s alto caer? m?s despacio.
En color rojo est? el c?digo del color de la nieve, en este caso es blanca, pero puedes cambiarlo por otro en caso que tu blog sea de un color claro, sino pues no se ver?.
Cuando acabe la temporada navide?a s?lo elimina el gadget donde pusiste el c?digo y se habr? ido la nieve.?No te gusta esta nieve? Aqu? hay otra opci?n para hacer que caiga nieve en el blog.
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