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An article will take you to understand CSS3 fillet knowledge

2020-11-06 20:42:39 Python advanced

One 、 Browser support

The number in the table specifies the first browser version that fully supports this property .

After the number -webkit- perhaps -moz- You need to specify the prefix when you use it .

attribute Chrome Firefox Safari Opera IE
border-radius 5.0 4.0 -webkit- 9.0 4.0 3.0 -moz- 5.0 3.1 -webkit- 10.5

Two 、border-radius attribute

1.   Create rounded corners with background image

CSS3 in , have access to border-radius attribute , Specify fillet display for elements .

The code is as follows :

<!DOCTYPE html>
    <html>
    <meta charset="UTF-8">
    <title> project </title>

    <head>
        <style>
            #rcorners1 {
                border-radius: 25px;
                background: #f00;
                padding: 20px;
                width: 200px;
                height: 150px;
            }

            #rcorners2 {
                border-radius: 25px;
                border: 2px solid #73AD21;
                padding: 20px;
                width: 200px;
                height: 150px;
            }

            #rcorners3 {
                border-radius: 25px;
                background: url(img/fy_indexBg.jpg);
                background-position: left top;
                background-repeat: repeat;
                padding: 20px;
                width: 200px;
                height: 150px;
            }
</style>
    </head>

    <body>

        <p>The border-radius property allows you to add rounded corners to elements.</p>
        <p>Rounded corners for an element with a specified background color:</p>
        <!--1. Rounded element with specified background color -->
        <p id="rcorners1">Rounded corners!</p>
        <p>Rounded corners for an element with a border:</p>
        <!--2. Rounded elements with borders :-->
        <p id="rcorners2">Rounded corners!</p>
        <!--3. Rounded elements with background image -->
        <p>Rounded corners for an element with a background image:</p>
        <p id="rcorners3">Rounded corners!</p>

    </body>

</html>

Tips :

border-radius The property is actually border-top-left-radius, border-top-right-radius, border-bottom-right-radius and border-bottom-left-radius Short form of property .


2. Specify radians for each angle

If only for border-radius Property specifies a value , Then this radius will be applied to all 4 Corner .

In addition, according to the needs of their own development , Specify each corner separately . Here are the rules :

The four values : The first value applies to the upper left corner , The second value applies to the upper right , The third value is applied to the lower right corner , The fourth value applies to the lower left corner .

Three values : The first value applies to the upper left , Two values apply to upper right and lower left , The third value at the bottom right applies to .

Two values : The first value applies to the upper left and lower right corners , And two values apply to the upper right and lower left corners .

A value : All four corners are round .

example 1:

1. The four values - border-radius: 15px 50px 30px 5px

#rcorners4 {
    border-radius: 15px 50px 30px 5px;
    background: #f00;
    padding: 20px;
    width: 200px;
    height: 150px;
}

2. Three values - border-radius: 15px 50px 30px

#rcorners5 {
    border-radius: 15px 50px 30px;
    background: #f00;
    padding: 20px;
    width: 200px;
    height: 150px;
}

3. Two values - border-radius: 15px 50px

#rcorners6 {
    border-radius: 15px 50px;
    background: #f00;
    padding: 20px;
    width: 200px;
    height: 150px;
}

Complete code :

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title> project </title>
  <style>
  #rcorners4 {
      border-radius: 15px 50px 30px 5px;
      background: #f00;
      padding: 20px;
      width: 200px;
      height: 150px;
  }

  #rcorners5 {
      border-radius: 15px 50px 30px;
      background: #f00;
      padding: 20px;
      width: 200px;
      height: 150px;
  }

  #rcorners6 {
      border-radius: 15px 50px;
      background: #f00;
      padding: 20px;
      width: 200px;
      height: 150px;
  }
</style>
</head>
<body>

<p> The four values  - border-radius: 15px 50px 30px 5px:</p>
<p id="rcorners4"></p>

<p> Three values  - border-radius: 15px 50px 30px:</p>
<p id="rcorners5"></p>

<p> Two values  - border-radius: 15px 50px:</p>
<p id="rcorners6"></p>

</body>
</html> 

example 2:

Create the rounded corners of the ellipse

Create the rounded corners of the ellipse

Oval border :border-radius: 50px/15px

#rcorners7 {
    border-radius: 50px/15px;
    background: #73AD21;
    padding: 20px;
    width: 200px;
    height: 150px;
}

Oval border : border-radius: 15px/50px

#rcorners8 {
        border-radius: 15px/50px;
        background: #73AD21;
        padding: 20px;
        width: 200px;
        height: 150px;
    }

Oval border : border-radius: 50%

#rcorners9 {
        border-radius: 50%;
        background: #73AD21;
        padding: 20px;
        width: 200px;
        height: 150px;
    }

Complete code :

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title> project </title>
  <style>
    #rcorners7 {
        border-radius: 50px/15px;
        background: #73AD21;
        padding: 20px;
        width: 200px;
        height: 150px;
    }

    #rcorners8 {
        border-radius: 15px/50px;
        background: #73AD21;
        padding: 20px;
        width: 200px;
        height: 150px;
    }

    #rcorners9 {
        border-radius: 50%;
        background: #73AD21;
        padding: 20px;
        width: 200px;
        height: 150px;
    }
</style>
</head>
<body>

  <p> Oval border  - border-radius: 50px/15px:</p>
  <p id="rcorners7"></p>

  <p> Oval border  - border-radius: 15px/50px:</p>
  <p id="rcorners8"></p>

  <p> Oval border  - border-radius: 50%:</p>
  <p id="rcorners9"></p>-->

</body>
</html>

3、 ... and 、 summary

1、 This article mainly explains CSS3 Round corners , Through the demonstration of some properties , Rich cases , Help you understand CSS knowledge . I hope you can study patiently , At the same time, I hope to actively search for problems , Try it , There's always a solution .

2、 The code is simple , I hope I can help you .

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