<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> .circle { width: 120px; height: 120px; position: relative; border-radius: 50%; background: #2c7efd; } .clip_left,.clip_right{ width:120px; height:120px; position: absolute; top: 0px;left: 0px; } .circle_left, .circle_right{ width:120px; height:120px; position: absolute; border-radius: 50%; top: 0px;left: 0px; background: #fdbf62; } /*出于展示用的改变背景色*/ /*.circle_left{ background: green; } .circle_right{ background: lightblue; }*/ .circle_right,.clip_right { clip:rect(0,auto,auto,60px); } .circle_left , .clip_left{ clip:rect(0,60px,auto,0); } /* *当top和left取值为auto时，相当于0 *当bottom和right取值为auto时，相当于100% */ .mask { width: 90px; height: 90px; border-radius: 50%; left: 15px; top: 15px; background: #FFF; position: absolute; text-align: center; line-height: 90px; font-size: 16px; } </style> </head> <body> <!--背景圆--> <div class="circle"> <!--左半边圆--> <div class="circle_left"> <div class="clip_left"> </div> </div> <!--右半边圆--> <div class="circle_right"> <div class="clip_right"></div> </div> <div class="mask"> <span>40</span>% </div> </div>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<script> $(function(){ if( $(\'.mask span\').text() <= 50 ){ $(\'.circle_right\').css(\'transform\',\'rotate(\'+($(\'.mask span\').text()*3.6)+\'deg)\'); }else{ $(\'.circle_right\').css({ \'transform\':\'rotate(0deg)\', "background":"#2c7efd" }); $(\'.circle_left\').css(\'transform\',\'rotate(\'+(($(\'.mask span\').text()-50)*3.6)+\'deg)\'); } }) </script> </body> </html>