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What does borderradius mean? Detailed explanation of border radius attribute

云罗郡主
云罗郡主Original
2018-11-10 14:42:1917275browse

For many CSS masters, borderradius should not be unfamiliar, but for some novices, the borderradius attribute is not so familiar. So what does borderradius mean? Let's talk about the border radius attribute.

1: What does borderradius mean

When we make a website, we always encounter the effect of rounded corners on the website. From the user's perspective, we use rounded corners. Corners can make a website more beautiful. However, in CSS2, achieving the effect of rounded corners is a headache. In fact, the oldest way is to achieve it through the background, but it is also very troublesome to make. Now, in CSS3 , we can use the border-radius attribute to achieve rounded corners, thereby reducing the problems encountered in achieving the rounded corner effect. [Recommended reading: How to use the border attribute of CSS to draw a triangle]

Many people who develop websites don’t like to use images. Try to use CSS images instead of using images. If the website has a lot of images, it will cause the website to send fttp requests, and the transmission is also very large. Then you can use the border-radius attribute to add rounded corners to the images to achieve Beautiful effect.

2: Detailed explanation of border radius attribute

1.border radius syntax:

border-radius: length value;

length The value can be expressed in px or percentage, for example: 

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>CSS3 border-radius属性</title>
    <style type="text/css">
    #div1
    {
        width:100px;
        height:50px;
        border:1px solid gray;
        border-radius:20px;
    }
    </style>
</head>
<body>
    <div id="div1">
    </div>
</body>
</html>

The display effect is as follows:

What does borderradius mean? Detailed explanation of border radius attribute

Note: In the above code, border-radius A value of 20 means that all four corners are 20.

2. How to write border-radius

Many properties in CSS are written in four ways, similar to margin and padding. When we set the border-radius attribute to a value, This means that the corner radius of the four corners is 10px.

When border-radius has two values, such as border-radius:10px 20px, 10px represents the upper left corner and lower right corner, and 20px Represents the upper right corner and lower left corner.

When the border-radius attribute has three values, for example, border-radius:10px 20px 30px; 10px represents the upper left corner radius, 20px represents the lower left corner and upper right corner, and 30px represents the lower right corner. If there are four values, they are the upper left corner, the upper right corner, the lower right corner and the lower left corner, and the direction is clockwise.

The above is what does borderradius mean? A complete introduction to the detailed explanation of the border radius attribute. If you want to know more about CSS3 tutorial, please pay attention to the php Chinese website.


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