雪花特效
<!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>Document</title>
</head>
<body>
<div id="app"></div>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script>
(function ($) {
$.fn.snow = function (options) {
var $flake = $('<div id="snowbox" />').css({
'position': 'absolute',
'z-index': '9999',
'top': '-50px',
'font-family': 'PingFang SC,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif'
}).html('❄'),
documentHeight = $(document).height(),
documentWidth = $(document).width(),
defaults = {
minSize: 5,
maxSize: 25,
newOn: 500,
flakeColor: getRandomColor() /* 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: getRandomColor()
}).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: 200 /* 定义密集程度，数字越小越密集 */
});
});
var getRandomColor = function () {
return '#' + Math.floor(Math.random() * 16777215).toString(16);
}
</script>
</body>
</html>