screenshots.gif

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>雪花特效</title>

    <style>
        * {
            padding: 0;
            margin: 0;
        }

        .content {
            width: 100vw;
            height: 100vh;
            background: url(https://xn--xu0a.cn/api/dn/) center center no-repeat;
            background-size: cover;
        }

        #rainBox {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            pointer-events: none;
        }

        .rain {
            position: absolute;
            width: 2px;
            height: 50px;
            background: linear-gradient(rgba(255, 255, 255, .3), rgba(255, 255, 255, .6));
        }
    </style>

    <style type="text/css">
        @font-face {
            font-family: TencentSans;
            src: url("chrome-extension://lkjkfecdnfjopaeaibboihfkmhdjmanm/static/fonts/TencentSans.woff2");
        }
    </style>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

    <script>
        window.onload = function () {
                    var minSize = 5; //最小字体
                    var maxSize = 50;//最大字体
                    var newOne = 100; //生成雪花间隔
                    var flakColor = "#fff"; //雪花颜色
                    var flak = $("<div></div>").css({position:"absolute","top":"0px"}).html("❉");//定义一个雪花
                    var dhight = $(window).height(); //定义视图高度
                    var dw =$(window).width()-80; //定义视图宽度
                    setInterval(function(){
                    var sizeflak = minSize+Math.random()*maxSize; //产生大小不等的雪花
                    var startLeft = Math.random()*dw; //雪花生成是随机的left值
                    var startOpacity = 0.7+Math.random()*0.3; //随机透明度
                    var endTop= dhight-100; //雪花停止top的位置
                    var endLeft= Math.random()*dw; //雪花停止的left位置
                    var durationfull = 5000+Math.random()*5000; //雪花飘落速度不同
                    flak.clone().appendTo($("body")).css({
                    "left":startLeft ,
                    "opacity":startOpacity,
                    "font-size":sizeflak,
                    "color":flakColor
                    }).animate({
                    "top":endTop,
                    "left":endLeft,
                    "apacity":0.1
                    },durationfull,function(){
                    $(this).remove()
                    });
                    },newOne);
                }
    </script>
</head>

<body>
    <div class="content">
        <div id="rainBox"></div>
    </div>
</body>

</html>