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Writing method: 1. Add "border-radius: rounded corner value;" style to the border to uniformly set the rounded corner size; 2. Add "border-top-left-radius: rounded corner value;", "border -top-right-radius: fillet value;" and other styles set the four-corner fillet size respectively.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
How to write css border into rounded border
The basic usage of rounded border (border-radius): border-radius attribute is a Abbreviation attribute, used to set the attributes of four rounded corners.
The most basic usage of the rounded border is to set four rounded corners with the same arc
border-top-left-radius:30px; //左上角 border-top-right-radius:30px; //右上角 border-bottom-left-radius:30px; //右下角 border-bottom-right-radius:30px; //左下角
If the four rounded corners are the same, it can be written as:
border-radius:30px;
Example :
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <style> .div1{ margin:0 auto; background: darkcyan; width:200px; height:200px; border:2px solid darkslategray; border-radius:30px; text-align: center; line-height: 200px; } </style> </head> <body> <div class="div1">圆角边框</div> </body> </html>
Output result:
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