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3.5.3 Outline Shorthand

The outline property is a shorthand property for setting the following individual outline properties:

The outline property is specified as one, two, or three values from the list above. The order of the values does not matter.

A dashed outline.

A dotted red outline.

A 5px solid yellow outline.

A thick ridge pink outline.

Example
p.ex1 {outline: dashed;}
p.ex2 {outline: dotted red;}
p.ex3 {outline: 5px solid yellow;}
p.ex4 {outline: thick ridge pink;}