前言

偶然间看到名为Ln的博客界面,感觉这个雪花动效好美哦,之前也看过好多下雪效果,感觉个人唯独中意这款。


操作

操作过程很简单

首先在\themes\butterfly\source\js目录下新建一个snowflake.js文件,然后将以下内容写入该文件:

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if((navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i))) {
// 移动端不显示
}
else{
document.write('<canvas id="snow" style="position:fixed;top:0;left:0;width:100%;height:100%;z-index:100;pointer-events:none"></canvas>');

window && (()=>{
let e = {
flakeCount: 50,
minDist: 150,
color: "255, 255, 255",
size: 2,
speed: .5,
opacity: .2,
stepsize: .5
};
const t = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame || function(e) {
window.setTimeout(e, 1e3 / 60)
}
;
window.requestAnimationFrame = t;
const i = document.getElementById("snow"),
n = i.getContext("2d"),
o = e.flakeCount;
let a = -100,
d = -100,
s = [];
i.width = window.innerWidth,
i.height = window.innerHeight;
const h = ()=>{
n.clearRect(0, 0, i.width, i.height);
const r = e.minDist;
for (let t = 0; t < o; t++) {
let o = s[t];
const h = a,
w = d,
m = o.x,
c = o.y,
p = Math.sqrt((h - m) * (h - m) + (w - c) * (w - c));
if (p < r) {
const e = (h - m) / p,
t = (w - c) / p,
i = r / (p * p) / 2;
o.velX -= i * e,
o.velY -= i * t
} else
o.velX *= .98,
o.velY < o.speed && o.speed - o.velY > .01 && (o.velY += .01 * (o.speed - o.velY)),
o.velX += Math.cos(o.step += .05) * o.stepSize;
n.fillStyle = "rgba(" + e.color + ", " + o.opacity + ")",
o.y += o.velY,
o.x += o.velX,
(o.y >= i.height || o.y <= 0) && l(o),
(o.x >= i.width || o.x <= 0) && l(o),
n.beginPath(),
n.arc(o.x, o.y, o.size, 0, 2 * Math.PI),
n.fill()
}
t(h)
}
, l = e=>{
e.x = Math.floor(Math.random() * i.width),
e.y = 0,
e.size = 3 * Math.random() + 2,
e.speed = 1 * Math.random() + .5,
e.velY = e.speed,
e.velX = 0,
e.opacity = .5 * Math.random() + .3
}
;
document.addEventListener("mousemove", (e=>{
a = e.clientX,
d = e.clientY
}
)),
window.addEventListener("resize", (()=>{
i.width = window.innerWidth,
i.height = window.innerHeight
}
)),
(()=>{
for (let t = 0; t < o; t++) {
const t = Math.floor(Math.random() * i.width)
, n = Math.floor(Math.random() * i.height)
, o = 3 * Math.random() + e.size
, a = 1 * Math.random() + e.speed
, d = .5 * Math.random() + e.opacity;
s.push({
speed: a,
velX: 0,
velY: a,
x: t,
y: n,
size: o,
stepSize: Math.random() / 30 * e.stepsize,
step: 0,
angle: 180,
opacity: d
})
}
h()
}
)()
}
)();
}

注:设置移动端不显示

找到主题配置文件_config.butterfly.yml,在injectbottom引入该js文件:

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inject:
head:
bottom:
- <script src="/js/snowflake.js"></script>

重新部署,启动就可以看见啦。


其他下雪动效

顺便把之前找到过的一款下雪动效的操作方法也写出来,喜欢的可以拿去

六边形雪片

img

操作过程也很简单,在\themes\butterfly\source\js目录下新建一个snow.js文件,然后将以下内容写入该文件:

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(function($){
$.fn.snow = function(options){
var $flake = $('<div id="snowbox" />').css({'position': 'absolute','z-index':'9999', 'top': '-50px'}).html('&#10052;'),
documentHeight = $(document).height(),
documentWidth = $(document).width(),
defaults = {
minSize : 10,
maxSize : 20,
newOn : 1000,
flakeColor : "#AFDAEF" /* 此处可以定义雪花颜色,若要白色可以改为#FFFFFF */
},
options = $.extend({}, defaults, options);
var interval= setInterval( function(){
var startPositionLeft = Math.random() * documentWidth - 100,
startOpacity = 0.5 + Math.random(),
sizeFlake = options.minSize + Math.random() * options.maxSize,
endPositionTop = documentHeight - 200,
endPositionLeft = startPositionLeft - 500 + Math.random() * 500,
durationFall = documentHeight * 10 + Math.random() * 5000;
$flake.clone().appendTo('body').css({
left: startPositionLeft,
opacity: startOpacity,
'font-size': sizeFlake,
color: options.flakeColor
}).animate({
top: endPositionTop,
left: endPositionLeft,
opacity: 0.2
},durationFall,'linear',function(){
$(this).remove()
});
}, options.newOn);
};
})(jQuery);
$(function(){
$.fn.snow({
minSize: 5, /* 定义雪花最小尺寸 */
maxSize: 50,/* 定义雪花最大尺寸 */
newOn: 300 /* 定义密集程度,数字越小越密集 */
});
});

然后将该js文件引入主题配置文件_config.butterfly.yml,同样在在injectbottom处:

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inject:
head:
bottom:
- <script src="/js/snow.js"></script> # 下雪动效

重新部署,启动,就可以看到效果啦。


结尾

把之前无比喜爱的樱花🌸动效换掉了,也许碰到更好看的就把这个也换掉啦。