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htmlHow to set the border: 1. Set the border width through the "border-width" attribute; 2. Set the border style through the "border-style" attribute; 3. Set the border color through the "border-color" attribute.
The operating environment of this article: Windows7 system, HTML5&&CSS3 version, DELL G3 computer
HTML Set borders for elements
Attribute: border, which can be the top, right, bottom and left borders of the element (the order is very important)
There are three values:
1.border-width: border width, The default is 3px, which can be set manually. Take the pixel value
2.border-style: border style, required. Desirable: solid (solid border) dashed (dashed border) dotted (dotted border) double (double border)
3.border-color: border color, take the color value, the default is black
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style media="screen"> h1{ width:300px; height:150px; } .c1{ /*边框宽度与颜色有默认值,样式必须设置*/ border:solid; } .c2{ border:5px solid red; } .c3{ border:5px dashed green; } .c4{ border:5px dotted blue; } .c5{ border:5px double orange; } </style> </head> <body> <h1 class="c1"></h1> <h1 class="c2"></h1> <h1 class="c3"></h1> <h1 class="c4"></h1> <h1 class="c5"></h1> </body> </html>
The effect is as follows:
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