一般圆饼图表的实现如不考虑IE低版本浏览器的话，利用Canvas或是CSS3都能很好的实现，可是我们现在做的项目最低都要兼容到IE8,所以就想到了Border，相信大家用过border画出各种兼容良好的三角行。
像这样的图表如果只平分四等分的话，实现起来还是挺简单的：
html代码：
<div class="border-i"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i></div>
CSS代码：
.border-i{ float:left; width:80px; height:80px; border-radius:40px; background:#ffd203; overflow:hidden; position:relative; }.border-i i{ width:0; height:0; border:40px transparent dotted; position:absolute;}.border-i .i1{ right:-40px; top:-40px;}.border-i .i2{ right:-40px; bottom:-40px;}.border-i .i3{ left:-40px; bottom:-40px;}.border-i .i4{ left:-40px; top:-40px;}
现在刚好把一个圆饼平分了四等分，如要不同颜色显示直接改变其border-color即可。
原理如下图，一个带有圆角的容器里面有四个宽高和自己一样的子元素平铺排列，然后溢出隐藏。
所以，如果比例占5%的话(默认宽高都80像素)，
h=40*tan(360deg*5%);
结果约等于13px,那css代码如下：
.border-i .i2{ top:-40px; right:-13px; border-right:13px solid #fd9500;} 呈现效果如下:
可以看出只要控制了圆饼的四分之一即0%~25%，那其他的25%~50%、50%~75%、75%~100%原理都一样，
其中除去几个特殊值:
/* 0% *//* 所有border-color默认透明； */ /* 25% */.border-i .i2{border:40px #fd9500 solid;} /* 50% */.border-i .i2,.border-i .i3{border:40px #fd9500 solid;} /* 75% */.border-i .i2,.border-i .i3,.border-i .i4{border:40px #fd9500 solid;} /* 100% */.border-i .i1,.border-i .i2,.border-i .i3,.border-i .i4{border:40px #fd9500 solid;} 其他的计算原理都一样：
/* *设 A = 5%~25%; * H = 40 * tan(360deg * A%); */.border-i .i1{ right: -Hpx; border-left: Hpx solid #fd9500;}/* *设 B = 25%~50%; * H = 40 * tan(360deg *(B% - 25%)); */.pct30 .i1{border-color: #fd9500;}.pct30 .i2{ bottom: -Hpx; border-top: Hpx solid #fd9500;}/* *设 C = 50%~75%; * H = 40 * tan(360deg *(C% - 50%)); */.pct55 .i1, .pct55 .i2{border-color: #fd9500;}.pct55 .i3{ left: -Hpx; border-right: Hpx solid #fd9500;}/* *设 D = 75%~100%; * H = 40 * tan(360deg *(D% - 75%)); */.pct80 .i1, .pct80 .i2, .pct80 .i3{border-color: #fd9500;}.pct80 .i4{ top: -Hpx; border-bottom: Hpx solid #fd9500;} 最后Demo效果如下：
Demo源码：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>利用CSS-border属性实现圆饼图表</title></head><style> *{margin:0;padding:0;border:none;} .border-i{ margin:5px; float:left; width:80px; height:80px; border-radius:40px; background:#ffd203; overflow:hidden; position:relative; } .border-i p{ position:absolute; left:20px; top:30px; font-size:20px; } .border-i i{ width:0; height:0; border:40px transparent dotted; position:absolute; } .border-i .i1{ right:-40px; top:-40px; } .border-i .i2{ right:-40px; bottom:-40px; } .border-i .i3{ left:-40px; bottom:-40px; } .border-i .i4{ left:-40px; top:-40px; } /* 默认0% */ /* 15% h = 40*tan(360deg * 15%) = 55 (px) */ .pct15 .i1{ right:-55px; border-left:55px solid #fd9500; } /* 25% */ .pct25 .i1{ border-color:#fd9500; } /* 40% h=40*tan(360deg*(40%-25%))=55 (px) */ .pct40 .i1{ border-color:#fd9500; } .pct40 .i2{ bottom:-55px; border-top:55px solid #fd9500; } /* 50% */ .pct50 .i1, .pct50 .i2{ border-color:#fd9500; } /* 65% h=40*tan(360deg*(65%-50%))=55 (px) */ .pct65 .i1, .pct65 .i2{ border-color:#fd9500; } .pct65 .i3{ left:-55px; border-right:55px solid #fd9500; } /* 75% */ .pct75 .i1, .pct75 .i2, .pct75 .i3{border-color:#fd9500;} /* 90% h=40*tan(360deg*(90%-75%))=55 (px) */ .pct90 .i1, .pct90 .i2, .pct90 .i3{ border-color:#fd9500; } .pct90 .i4{ top:-55px; border-bottom:55px solid #fd9500; } /* 100% */ .pct100 .i1, .pct100 .i2, .pct100 .i3, .pct100 .i4{border-color:#fd9500;}</style><body> <div class="border-i pct0"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>0%</p> </div> <div class="border-i pct15"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>15%</p> </div> <div class="border-i pct25"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>25%</p> </div> <div class="border-i pct40"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>40%</p> </div> <div class="border-i pct50"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>50%</p> </div> <div class="border-i pct65"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>65%</p> </div> <div class="border-i pct75"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>75%</p> </div> <div class="border-i pct90"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>90%</p> </div> <div class="border-i pct100"> <i class="i1"></i> <i class="i2"></i> <i class="i3"></i> <i class="i4"></i> <p>100%</p> </div></body></html> 如果要兼容IE8以下的浏览器的圆角（border-radius），就加一个尺寸一样的遮罩层，背景为圆形镂空背景色的纯色png图片：
<!--[if lt IE 9]><script src="http://s1.benimg.com/min/f=/v4/base/js/jq172.js"></script><script type="text/javascript" >$(function(){$('.border-i').append('<div style="width:100%;height:100%;position:absolute;left:0;top:0;z-index:1;background:url('图片地址') no-repeat center top;}"></div>');});</script><![endif]--> 在body底部
What is the purpose of the <datalist> element?Mar 21, 2025 pm 12:33 PMThe article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159
What is the purpose of the <progress> element?Mar 21, 2025 pm 12:34 PMThe article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati
What is the purpose of the <meter> element?Mar 21, 2025 pm 12:35 PMThe article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex
What is the purpose of the <iframe> tag? What are the security considerations when using it?Mar 20, 2025 pm 06:05 PMThe article discusses the <iframe> tag's purpose in embedding external content into webpages, its common uses, security risks, and alternatives like object tags and APIs.
What is the viewport meta tag? Why is it important for responsive design?Mar 20, 2025 pm 05:56 PMThe article discusses the viewport meta tag, essential for responsive web design on mobile devices. It explains how proper use ensures optimal content scaling and user interaction, while misuse can lead to design and accessibility issues.
How do I use HTML5 form validation attributes to validate user input?Mar 17, 2025 pm 12:27 PMThe article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.
What are the best practices for cross-browser compatibility in HTML5?Mar 17, 2025 pm 12:20 PMArticle discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.
How do I use the HTML5 <time> element to represent dates and times semantically?Mar 12, 2025 pm 04:05 PMThis article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 English version
Recommended: Win version, supports code prompts!
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
Zend Studio 13.0.1
Powerful PHP integrated development environment
Atom editor mac version download
The most popular open source editor
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
