How to achieve rounded borders with CSS

CSS to achieve rounded borders requires the use of the border-radius property in CSS. Let’s take a look at the details of CSS to implement rounded borders.

Let’s take a look at the implementation code of a border without rounded corners

<div style="border:solid 4px #808080;">这是一个框架</div>

The effect is as follows:

Let’s do it next Let’s look specifically at the code that uses the border-radius attribute in CSS to implement rounded borders.

Let’s first look at the syntax format of the border-radius attribute:

brder-radius:（左上水平半径）（右上水平半径）（右下水平半径）（左下水平半径）/（左上垂直半径）（右上垂直半径）（右下垂直半径）（左下垂直半径）;

If / is omitted, it is assumed to be horizontal Have the same radius in both direction and vertical direction.

brder-radius:(左上半径）（右上半径）（右下半径）（左下半径）;

Code example 1:

<div style="height:75px; padding-top:25px; border:solid 4px #808080;
  border-radius: 25px 25px 25px 25px / 25px 25px 25px 25px;">这是一个圆角边框</div>

The effect is as follows:

Code example 2

<div style="height:75px; padding-top:25px; border:solid 4px #808080;
  border-radius: 100px 100px 1005px 1005px / 25px 25px 25px 25px;">圆角边框</div>

The effect As follows:

Code example 3

<div style="height:75px; padding-top:25px; padding-left:16px; border:solid 4px #808080;
  border-radius: 50px 20px 20px 20px;">圆角边框</div>

The effect is as follows:

Specify corner radius individually

border-top-left-radius

border-top-righr-radius

border-bottom-left-radius

border-bottom-right-radius

You can also specify the radius of each corner individually. The format is

border-top-left-radius (角的半径)

or

border-top-left-radius (角的水平半径) (角的垂直半径)

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