Outlines are very similar to borders, but there are few major differences as well −
- An outline does not take up space.
- Outlines do not have to be rectangular.
- Outline is always the same on all sides; you cannot specify different values for different sides of an element.
NOTE − The outline properties are not supported by IE 6 or Netscape 7.
You can set the following outline properties using CSS.
- The outline-width property is used to set the width of the outline.
- The outline-style property is used to set the line style for the outline.
- The outline-color property is used to set the color of the outline.
- The outline property is used to set all the above three properties in a single statement.
The outline-width Property
The outline-width property specifies the width of the outline to be added to the box. Its value should be a length or one of the values thin, medium, or thick,just like the border-width attribute.
A width of zero pixels means no outline.
Here is an example −
<html> <head> </head> <body> <p style = "outline-width:thin; outline-style:solid;"> This text is having thin outline. </p> <br /> <p style = "outline-width:thick; outline-style:solid;"> This text is having thick outline. </p> <br /> <p style = "outline-width:5px; outline-style:solid;"> This text is having 5x outline. </p> </body> </html>
The outline-style Property
The outline-style property specifies the style for the line (solid, dotted, or dashed) that goes around an element. It can take one of the following values −
- none − No border. (Equivalent of outline-width:0;)
- solid − Outline is a single solid line.
- dotted − Outline is a series of dots.
- dashed − Outline is a series of short lines.
- double − Outline is two solid lines.
- groove − Outline looks as though it is carved into the page.
- ridge − Outline looks the opposite of groove.
- inset − Outline makes the box look like it is embedded in the page.
- outset − Outline makes the box look like it is coming out of the canvas.
- hidden − Same as none.
Here is an example −
<html> <head> </head> <body> <p style = "outline-width:thin; outline-style:solid;"> This text is having thin solid outline. </p> <br /> <p style = "outline-width:thick; outline-style:dashed;"> This text is having thick dashed outline. </p> <br /> <p style = "outline-width:5px;outline-style:dotted;"> This text is having 5x dotted outline. </p> </body> </html>
The outline-color Property
The outline-color property allows you to specify the color of the outline. Its value should either be a color name, a hex color, or an RGB value, as with the color and border-color properties.
Here is an example −
<html> <head> </head> <body> <p style = "outline-width:thin; outline-style:solid;outline-color:red"> This text is having thin solid red outline. </p> <br /> <p style = "outline-width:thick; outline-style:dashed;outline-color:#009900"> This text is having thick dashed green outline. </p> <br /> <p style = "outline-width:5px;outline-style:dotted;outline-color:rgb(13,33,232)"> This text is having 5x dotted blue outline. </p> </body> </html>
The outline Property
The outline property is a shorthand property that allows you to specify values for any of the three properties discussed previously in any order but in a single statement.
Here is an example −
<html> <head> </head> <body> <p style = "outline:thin solid red;"> This text is having thin solid red outline. </p> <br /> <p style = "outline:thick dashed #009900;"> This text is having thick dashed green outline. </p> <br /> <p style = "outline:5px dotted rgb(13,33,232);"> This text is having 5x dotted blue outline. </p> </body> </html>
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