Posted in jQuery onFebruary 02, 2018
本文实例讲述了jQuery实现的下雪动画效果。分享给大家供大家参考，具体如下：
html部分：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="viewport"
content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=2.0, user-scalable=yes" />
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<!-- snow -->
<script src="js/jquery.snow.js"></script>
</head>
<body>
<div id="content-wrapper">
<div class="inner clearfix">
<section id="main-content">
<img src="images/merry_christmasA.jpg" alt="chrismas">
</section>
</div>
</div>
<script>
$(document).ready( function(){
$.fn.snow( { minSize: 2, maxSize: 150, newOn: 200, flakeColor: '#FFFFFF' } );
});
</script>
</body>
</html>
jquery.snow.js:
/**
* jquery.snow - jQuery Snow Effect Plugin
*
* Available under MIT licence
*
* @version 1 (21. Jan 2012)
* @author Ivan Lazarevic
* @requires jQuery
* @see http://workshop.rs
*
* @params minSize - min size of snowflake, 10 by default
* @params maxSize - max size of snowflake, 20 by default
* @params newOn - frequency in ms of appearing of new snowflake, 500 by default
* @params flakeColor - color of snowflake, #FFFFFF by default
* @example $.fn.snow({ maxSize: 200, newOn: 1000 });
*/
(function($){
$.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 : 500,
flakeColor : "#FFFFFF"
},
options = $.extend({}, defaults, options);
//setInterval-setInterval() 方法可按照指定的周期（以毫秒计）来调用函数或计算表达式。
//开始一个周期-开始添加雪花
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(//增加雪花动态效果
{
top: endPositionTop,
left: endPositionLeft,
opacity: 0.2
},
durationFall,
'linear',
function() {
$(this).remove()
}
);
}, options.newOn);
//结束周期-停止添加雪花
setTimeout(function(){
window.clearInterval(interval);
},5000);
};
})(jQuery);
不需要css样式
主要用到：setInterval-setInterval() 方法可按照指定的周期（以毫秒计）来调用函数或计算表达式。& animate动画
运行效果：
附：完整实例代码点击此处本站下载。
希望本文所述对大家jQuery程序设计有所帮助。
jQuery实现的下雪动画效果示例【附源码下载】
- Author -
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