How to make a circle in css

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; }

          
  
 
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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:

(Learning video sharing:css Video tutorial)

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