雪花飘落代码
2019-02-26 11:33 改吧 阅读(1238) 评论(2) 编辑 收藏 举报(function($) { $.fn.snow = function(options) { var $flake = $('<div id="flake" />').css({ 'position': 'absolute', 'top': '-50px' }).html('❄'), documentHeight = $(document).height(), documentWidth = $(document).width(), defaults = { minSize: 10, maxSize: 20, newOn: 2000, flakeColor: "red" }, 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 - 40, endPositionLeft = startPositionLeft - 100 + Math.random() * 200, 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); $.fn.snow({ minSize: 5, maxSize: 50, newOn: 2000, flakeColor: 'red' });