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jquery+css3 realizes the effect of moving small circles_jquery

WBOY
WBOYOriginal
2016-05-16 15:17:332109browse

The example in this article describes how jquery+css3 achieves the effect of moving small circles. Share it with everyone for your reference, the details are as follows:

The screenshot of the running effect is as follows:

The specific code is as follows: 

<!DOCTYPE html>
<html lang="zh-cn">
<head>
 <meta charset="utf-8" />
 <title>那些变换颜色的小豆豆</title>
 <script type="text/javascript" src="jquery.js"></script>
 <style type="text/css">
  h1{font-size:16px;}
  .circle
  {
   position:absolute;
   width:100px;
   height:100px;
   border-radius: 50px;
   -webkit-border-radius:50px;
   -moz-border-radius:50px;
   -o-border-radius:50px;
   -ms-border-radius:50px;
   border:1px solid #ddd;
   background-color:#eee;
   text-align:center;
   -moz-transition:background-color .5s ease-in;
   -webkit-transition:background-color .5s ease-in;
   -o-transition:background-color .5s ease-in;
   -ms-transition:background-color .5s ease-in;
   transition:background-color .5s ease-in;
  }
 </style>
 <script type="text/javascript" > 
  var colorArray = "ABCDEFabcdef1234567890".split('');
  function createCircle(position, size){
   var html = [];
   var radius = size.height > size.width &#63; size.height/2 : size.width / 2;
   var opacity = Math.random();
   opacity = opacity < 0.3 &#63; opacity = 0.3 : opacity;
   html.push('<div class="circle" style="left:'+position.left+'px; top:'+position.top+'px;');
   html.push('width:'+size.width+'px; height:'+size.height+'px; ');
   html.push('border-radius:'+radius+'px;');
   html.push('-webkit-border-radius:'+radius+'px;');
   html.push('-moz-border-radius:'+radius+'px;');
   html.push('-o-border-radius:'+radius+'px;');
   html.push('-ms-border-radius:'+radius+'px;');
   html.push('opacity:'+opacity+';');
   html.push('filter:alpha(opacity='+Math.round(opacity*100)+')');
   html.push('" ></div>');
   return html.join('');
  }
  function createColor(){
   var color = "";
   for(var i=0; i<6; i++) {
    color += colorArray[Math.ceil(Math.random()*21)];
   }
   return "#"+color;
  }
  function animate(obj){
   setInterval(function(){
    var position = obj.position();
    var left = parseInt(position.left);
    var top = parseInt(position.top);
    obj.css('background-color', createColor());
    obj.animate({'left': left + 5}, 250);
    obj.animate({'left': left - 5, 'top': top + 5}, 250);
    obj.animate({'top': top}, 250);
    obj.animate({'left': left, 'top': top}, 250);
   }, 1000);
  }
  $(document).ready(function(){
   var wrapper = $("#wrapper");
   var height = parseInt(document.documentElement.clientHeight || 500);
   var width = parseInt(wrapper.width());
   for(var i=0; i<200; i++) {
    var position = {
     left: Math.round(Math.random()*(width - 50)),
     top: Math.round(Math.random()*(height - 100))
    };
    var _size = 50 - Math.round(Math.random()*40);
    var size = {
     height: _size,
     width: _size
    };
    var circle = $(createCircle(position, size));
    circle.appendTo(wrapper);
    circle.mouseover(function(){
     var color = createColor();
     $(this).css('background-color', color);
    }).mouseout(function(){
     var color = createColor();
     $(this).css('background-color', color);
    });
    animate(circle);
   }
  });
 </script>
</head>
<body id="wrapper">
 <div id="wrapper">
 </div>
</body>
</html>

Readers who are interested in more content related to jQuery special effects can check out the special topics on this site: "Summary of common classic special effects of jQuery" and "Summary of jQuery animation and special effects usage"

I hope this article will be helpful to everyone in jQuery programming.

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