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In CSS, you can use the border-radius attribute to make a circle; the border-radius attribute can add a rounded border to an element. You only need to set "border-radius: 100%" to a square element with the same width and height. ;" style is enough.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
p Css to make a quarter circle mainly uses the border-radius rounded corner hidden attribute in Css3.0. Using this attribute, we candraw a circle, a semicircle, and a quarter circle Three circles, quarter circles, etc. I will update in the future...
How to use the border-radius attribute, the following is the most basic method of using the border-radius attribute:
.round { border-radius: 5px; /* 所有角都使用半径为5px的圆角,此属性为CSS3标准属性 */ -moz-border-radius: 5px; /* Mozilla浏览器的私有属性 */ -webkit-border-radius: 5px; /* Webkit浏览器的私有属性 */ border-radius: 5px 4px 3px 2px; /* 四个半径值分别是左上角、右上角、右下角和左下角 */ }
1. Use border-radius to draw a circle:
#circle { width: 200px; height: 200px; background-color: #a72525; -webkit-border-radius: 100px; /*-webkit-border-radius: 100%;*/ }
Think about it carefully, the radius of the largest circle in a square (200*200) is: 100.
2. Hollow circle code: The hollow circle actually has only a border, and the hollow part is filled with other colors:
#circle { width: 200px; height: 200px; background-color: #efefef; /* Can be set to transparent */ border: 3px #a72525 solid; -webkit-border-radius: 100px; }
Similarly dotted circle code:
#circle { width: 200px; height: 200px; background-color: #efefef; /* Can be set to transparent */ border: 3px #a72525 dashed; -webkit-border-radius: 100px 100px 100px 100px; }
3. Semicircle and quarter circle codes :
#quartercircle { width: 200px; height: 200px; background-color: #a72525; -webkit-border-radius: 200px 0 0 0; }
<!doctype html> <html> <head> <meta charset="UTF-8"> <meta name="Generator" content="EditPlus®"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <title>Document</title> <style type="text/css"> #quartercircle{ width: 200px; height: 200px; background-color: #ffffaa; border-radius:0 0 0 200px; -webkit-border-radius: 0 0 0 200px; -moz-border-radius: 0 0 0 200px; -ms-border-radius: 0 0 0 200px; -o-border-radius: 0 0 0 200px; } #quartercircle .dianxuan{ font-family:Arial; color:gray; font-size:25px; padding-top: 55px; padding-left: 90px; transform:rotate(32deg); -ms-transform:rotate(32deg); /* Internet Explorer */ -moz-transform:rotate(32deg); /* Firefox */ -webkit-transform:rotate(32deg); /* Safari 和 Chrome */ -o-transform:rotate(32deg); /* Opera */ } </style> </head> <body> <div id="quartercircle"> <div>点选</div> </div> </body> </html>
Explanation:
-moz(for example-moz -border-radius) for Firefox
-webkit (for example: -webkit-border-radius) for Safari and Chrome
Among them, the support of each browser of border-radius is as shown in the table:
Browser | Support |
---|---|
Firefox(2, 3) | √ |
Google Chrome(1.0.154…) | √ |
Google Chrome(2.0.156…) | √ |
Safari(3.2.1 windows) | √ |
Internet Explorer(IE7, IE8) | × |
Opera 9.6 | × |
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