クリスマスだしはてなブログに雪降らせてみました。

クリスマスだしはてなブログに雪降らせてみました。
f:id:funclur:20161224122403j:plain

簡単に雪を降らせる方法なのでやってみてください。

https://github.com/loktar00/JQuery-Snowfall

通常は上記からダウンロードしサーバーにjsファイルや画像をアップロードすることで実現しますが、はてなはファイルをアップロードすることはできないので下記をデザインのヘッダーに入れれば大丈夫です。

jqueryを読み込んでいない人は先に読み込む必要があります。

<script src="//code.jquery.com/jquery-2.1.0.js"></script>

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    ====================================================================
    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
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Date.now||(Date.now=function(){return(new Date).getTime()}),function(){"use strict";for(var t=["webkit","moz"],e=0;e<t.length&&!window.requestAnimationFrame;++e){var i=t[e];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 s=0;window.requestAnimationFrame=function(t){var e=Date.now(),i=Math.max(s+16,e);return setTimeout(function(){t(s=i)},i-e)},window.cancelAnimationFrame=clearTimeout}}(),function(t){t.snowfall=function(e,i){function s(s,n,a,o){this.x=s,this.y=n,this.size=a,this.speed=o,this.step=0,this.stepSize=h(1,10)/100,i.collection&&(this.target=m[h(0,m.length-1)]);var r=null;i.image?(r=document.createElement("img"),r.src=i.image):(r=document.createElement("div"),t(r).css({background:i.flakeColor})),t(r).attr({"class":"snowfall-flakes"}).css({width:this.size,height:this.size,position:i.flakePosition,top:this.y,left:this.x,fontSize:0,zIndex:i.flakeIndex}),t(e).get(0).tagName===t(document).get(0).tagName?(t("body").append(t(r)),e=t("body")):t(e).append(t(r)),this.element=r,this.update=function(){if(this.y+=this.speed,this.y>l-(this.size+6)&&this.reset(),this.element.style.top=this.y+"px",this.element.style.left=this.x+"px",this.step+=this.stepSize,this.x+=y===!1?Math.cos(this.step):y+Math.cos(this.step),i.collection&&this.x>this.target.x&&this.x<this.target.width+this.target.x&&this.y>this.target.y&&this.y<this.target.height+this.target.y){var t=this.target.element.getContext("2d"),e=this.x-this.target.x,s=this.y-this.target.y,n=this.target.colData;if(void 0!==n[parseInt(e)][parseInt(s+this.speed+this.size)]||s+this.speed+this.size>this.target.height)if(s+this.speed+this.size>this.target.height){for(;s+this.speed+this.size>this.target.height&&this.speed>0;)this.speed*=.5;t.fillStyle="#fff",void 0==n[parseInt(e)][parseInt(s+this.speed+this.size)]?(n[parseInt(e)][parseInt(s+this.speed+this.size)]=1,t.fillRect(e,s+this.speed+this.size,this.size,this.size)):(n[parseInt(e)][parseInt(s+this.speed)]=1,t.fillRect(e,s+this.speed,this.size,this.size)),this.reset()}else this.speed=1,this.stepSize=0,parseInt(e)+1<this.target.width&&void 0==n[parseInt(e)+1][parseInt(s)+1]?this.x++:parseInt(e)-1>0&&void 0==n[parseInt(e)-1][parseInt(s)+1]?this.x--:(t.fillStyle="#fff",t.fillRect(e,s,this.size,this.size),n[parseInt(e)][parseInt(s)]=1,this.reset())}(this.x+this.size>d-c||this.x<c)&&this.reset()},this.reset=function(){this.y=0,this.x=h(c,d-c),this.stepSize=h(1,10)/100,this.size=h(100*i.minSize,100*i.maxSize)/100,this.element.style.width=this.size+"px",this.element.style.height=this.size+"px",this.speed=h(i.minSpeed,i.maxSpeed)}}function n(){for(r=0;r<a.length;r+=1)a[r].update();f=requestAnimationFrame(function(){n()})}var a=[],o={flakeCount:35,flakeColor:"#ffffff",flakePosition:"absolute",flakeIndex:999999,minSize:1,maxSize:2,minSpeed:1,maxSpeed:5,round:!1,shadow:!1,collection:!1,collectionHeight:40,deviceorientation:!1},i=t.extend(o,i),h=function(t,e){return Math.round(t+Math.random()*(e-t))};t(e).data("snowfall",this);var r=0,l=t(e).height(),d=t(e).width(),c=0,f=0;if(i.collection!==!1){var p=document.createElement("canvas");if(p.getContext&&p.getContext("2d"))for(var m=[],w=t(i.collection),g=i.collectionHeight,r=0;r<w.length;r++){var u=w[r].getBoundingClientRect(),x=t("<canvas/>",{"class":"snowfall-canvas"}),z=[];if(u.top-g>0){t("body").append(x),x.css({position:i.flakePosition,left:u.left+"px",top:u.top-g+"px"}).prop({width:u.width,height:g});for(var v=0;v<u.width;v++)z[v]=[];m.push({element:x.get(0),x:u.left,y:u.top-g,width:u.width,height:g,colData:z})}}else i.collection=!1}for(t(e).get(0).tagName===t(document).get(0).tagName&&(c=25),t(window).bind("resize",function(){l=t(e)[0].clientHeight,d=t(e)[0].offsetWidth}),r=0;r<i.flakeCount;r+=1)a.push(new s(h(c,d-c),h(0,l),h(100*i.minSize,100*i.maxSize)/100,h(i.minSpeed,i.maxSpeed)));i.round&&t(".snowfall-flakes").css({"-moz-border-radius":i.maxSize,"-webkit-border-radius":i.maxSize,"border-radius":i.maxSize}),i.shadow&&t(".snowfall-flakes").css({"-moz-box-shadow":"1px 1px 1px #555","-webkit-box-shadow":"1px 1px 1px #555","box-shadow":"1px 1px 1px #555"});var y=!1;i.deviceorientation&&t(window).bind("deviceorientation",function(t){y=.1*t.originalEvent.gamma}),n(),this.clear=function(){t(".snowfall-canvas").remove(),t(e).children(".snowfall-flakes").remove(),cancelAnimationFrame(f)}},t.fn.snowfall=function(e){return"object"==typeof e||void 0==e?this.each(function(){new t.snowfall(this,e)}):"string"==typeof e?this.each(function(){var e=t(this).data("snowfall");e&&e.clear()}):void 0}}(jQuery);
$(document).snowfall();