上班期间也没时间去更新博客，元旦休假的时候就写点内容，分享一段 wordpress博客网站下雪特效，喜欢的话也可以拿到你的网站去使用。

属性 */
        snow = snow || {};
        this.maxFlake = snow.maxFlake || 200;   /* 最多片数 */
        this.flakeSize = snow.flakeSize || 10;  /* 雪花形状 */
        this.fallSpeed = snow.fallSpeed || 1;   /* 坠落速度 */
    }
    /* 兼容写法 */
    requestAnimationFrame = window.requestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.msRequestAnimationFrame ||
        window.oRequestAnimationFrame ||
        function(callback) { setTimeout(callback,1000 / 60); };
cancelAnimationFrame = window.cancelAnimationFrame ||
    window.mozCancelAnimationFrame ||
    window.webkitCancelAnimationFrame ||
    window.msCancelAnimationFrame ||
    window.oCancelAnimationFrame;
/* 开始下雪 */
snowFall.prototype.start = function(){
    /* 创建画布 */
    snowCanvas.apply(this);
    /* 创建雪花形状 */
    createFlakes.apply(this);
    /* 画雪 */
    drawSnow.apply(this)
}
/* 创建画布 */
function snowCanvas() {
    /* <a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>Dom结点 */
    var snowcanvas = document.createElement("canvas");
    snowcanvas.id = "snowfall";
    snowcanvas.width = window.innerWidth;
    snowcanvas.height = document.body.clientHeight;
    snowcanvas.setAttribute("style","position:absolute; top: 0; left: 0; z-index: 1; pointer-events: none;");
    document.getElementsByTagName("body")[0].appendChild(snowcanvas);
    this.canvas = snowcanvas;
    this.ctx = snowcanvas.getContext("2d");
    /* 窗口大小改变的处理 */
    window.onresize = function() {
        snowcanvas.width = window.innerWidth;
        /* snowcanvas.height = window.innerHeight */
    }
}
/* 雪运动对象 */
function flakeMove(canvasWidth,canvasHeight,flakeSize,fallSpeed) {
    this.x = Math.floor(Math.random() * canvasWidth);   /* x坐标 */
    this.y = Math.floor(Math.random() * canvasHeight);  /* y坐标 */
    this.size = Math.random() * flakeSize + 2;          /* 形状 */
    this.maxSize = flakeSize;                           /* 最大形状 */
    this.speed = Math.random() * 1 + fallSpeed;         /* 坠落速度 */
    this.fallSpeed = fallSpeed;                         /* 坠落速度 */
    this.velY = this.speed;                             /* Y方向速度 */
    this.velX = 0;                                      /* X方向速度 */
    this.stepSize = Math.random() / 30;                 /* 步长 */
    this.step = 0                                       /* 步数 */
}
flakeMove.prototype.update = function() {
    var x = this.x,y = this.y;
    /* 左右摆动(余弦) */
    this.velX *= 0.98;
    if (this.velY <= this.speed) { this.velY = this.speed } this.velX += Math.cos(this.step += .05) * this.stepSize; this.y += this.velY; this.x += this.velX; /* 飞出边界的处理 */ if (this.x >= canvas.width || this.x <= 0 || this.y >= canvas.height || this.y <= 0) {
        this.reset(canvas.width,canvas.height)
    }
};
/* 飞出边界-放置最顶端继续坠落 */
flakeMove.prototype.reset = function(width,height) {
    this.x = Math.floor(Math.random() * width);
    this.y = 0;
    this.size = Math.random() * this.maxSize + 2;
    this.speed = Math.random() * 1 + this.fallSpeed;
    this.velY = this.speed;
    this.velX = 0;
};
// 渲染雪花-<a href="/tag/suiji/" target="_blank" class="keywords">随机</a>形状（此处可<a href="/tag/xiugai/" target="_blank" class="keywords">修改</a>雪花颜色！！！）
flakeMove.prototype.render = function(ctx) {
    var snowFlake = ctx.createRadialGradient(this.x,this.y,this.x,this.size);
    snowFlake.addColorStop(0,"rgba(255,255,0.9)");  /* 此处是雪花颜色，默认是白色 */
    snowFlake.addColorStop(.5,0.5)"); /* 若要改为其他颜色，请自行查 */
    snowFlake.addColorStop(1,0)");    /* 找16进制的RGB 颜色<a href="/tag/daima/" target="_blank" class="keywords">代码</a>。 */
    ctx.save();
    ctx.fillStyle = snowFlake;
    ctx.beginPath();
    ctx.arc(this.x,this.size,Math.PI * 2);
    ctx.fill();
    ctx.restore();
};
/* 创建雪花-定义形状 */
function createFlakes() {
    var maxFlake = this.maxFlake,flakes = this.flakes = [],canvas = this.canvas;
    for (var i = 0; i < maxFlake; i++) {
        flakes.push(new flakeMove(canvas.width,canvas.height,this.flakeSize,this.fallSpeed))
    }
}
/* 画雪 */
function drawSnow() {
    var maxFlake = this.maxFlake,flakes = this.flakes;
    ctx = this.ctx,canvas = this.canvas,that = this;
    /* 清空雪花 */
    ctx.clearRect(0,canvas.width,canvas.height);
    for (var e = 0; e < maxFlake; e++) {
        flakes[e].update();
        flakes[e].render(ctx);
    }
    /*  一帧一帧的画 */
    this.loop = requestAnimationFrame(function() {
        drawSnow.apply(that);
    });
}
/* <a href="/tag/diaoyong/" target="_blank" class="keywords">调用</a>及控制<a href="/tag/fangfa/" target="_blank" class="keywords">方法</a> */
var snow = new snowFall({maxFlake:60});
snow.start();

使用方法：

方法①：复制其中一种JS代码，粘贴到网站标签之前即可；

方法②：去掉代码前后的