Using Border in CSS

Defining border in CSS

The CSS border property allows you to define a line border for an element:

h1 {
   border: 5px solid red;
}
a {
   border: 2px solid green; 
}

It is actually a shorthand for three CSS line border subproperties:

• border-width
• border-style
• border-color

Working with border: CSS syntax

To define a line border in CSS, follow the syntax example below:

border: width style color;

The available values will be explained in the following section.

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Property values

Note: you don't need to define all of the subproperties for line borders necessarily. The order is also not important.

Browser support

Chrome

1+

Edge

12+

Firefox

1+

IE

4+

Opera

3.5+

Safari

1+

Mobile browser support

Chrome

18+

Firefox

4+

Safari

1+