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How to achieve snow animation effect in jQuery

亚连Original: 2018-06-08 11:21:281799browse

This article mainly introduces the snow animation effect implemented by jQuery, involving the related usage skills of jQuery plug-in combined with setInterval and animate for animation operation, and comes with source code for readers to download and refer to. Friends who need it can refer to it

The example in this article describes the snow animation effect implemented by jQuery. Share it with everyone for your reference, the details are as follows:

html part:

<!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>
    <p id="content-wrapper">
     <p class="inner clearfix">
      <section id="main-content">
       <img src="images/merry_christmasA.jpg" alt="chrismas">
      </section>
     </p>
    </p>
    <script>
     $(document).ready( function(){
     $.fn.snow( { minSize: 2, maxSize: 150, newOn: 200, flakeColor: &#39;#FFFFFF&#39; } );
     });
    </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     = $(&#39;<p id="flake" />&#39;).css({&#39;position&#39;: &#39;absolute&#39;, &#39;top&#39;: &#39;-50px&#39;}).html(&#39;❄&#39;),
        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(&#39;body&#39;)
          .css(
            {
              left: startPositionLeft,
              opacity: startOpacity,
              &#39;font-size&#39;: sizeFlake,
              color: options.flakeColor
            }
          )
          .animate(//增加雪花动态效果
            {
              top: endPositionTop,
              left: endPositionLeft,
              opacity: 0.2
            },
            durationFall,
            &#39;linear&#39;,
            function() {
              $(this).remove()
            }
          );
      }, options.newOn);
      //结束周期-停止添加雪花
      setTimeout(function(){
        window.clearInterval(interval);
      },5000);
  };
})(jQuery);

No css style required

Main Used: setInterval-setInterval() The method can call a function or calculate an expression according to the specified period (in milliseconds). & animate animation

Operation effect:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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