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How to make a circle in css

青灯夜游
青灯夜游Original
2021-04-08 17:57:1611184browse

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.

How to make a circle in css

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;
}

How to make a circle in css

3. Semicircle and quarter circle codes :

#quartercircle {
    width: 200px;
    height: 200px;
    background-color: #a72525;
    -webkit-border-radius: 200px 0 0 0;
}

How to make a circle in css

<!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>

How to make a circle in css

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 ×

(Learning video sharing: css Video tutorial)

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