<script type="text/javascript">(function($){ ??$.fn.snow = function(options){ ??var $flake = $(‘<div id="snowbox" />‘).css({‘position‘: ‘absolute‘,‘z-index‘:‘9999‘, ‘top‘: ‘-50px‘}).html(‘?‘), ??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 */ ???});});</script>网站站点添加雪花飘落效果，本段js代码依赖 JQurey，如果没效果，请确认网页是否已载入 JQurey
纯代码为网站站点添加雪花飘落效果
原文地址：https://www.cnblogs.com/webdom/p/10451163.html