CSS Pseudo-elements
CSS pseudo-elements are used to add special effects
to some selectors.
Examples
Make the first letter special
This example demonstrates how to add a special effect to the first
letter of a text.
Make the first line special
This example demonstrates how to add a special effect to the first line of a text.
Make the
first letter and first line special
This example demonstrates how to add a special effect to the first letter and
the first line of a text.
Use :before to
insert some content before the content of an element (Does not work in IE)
This example demonstrates how to use the :before pseudo-element to insert an
image before an element.
Use :after to
insert some content after the content of an element (Does not work in IE)
This example demonstrates how to use the :after pseudo-element to insert an
image after an element.
Syntax
The syntax of pseudo-elements:
selector:pseudo-element {property: value}
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CSS classes can also be used with pseudo-elements:
selector.class:pseudo-element {property: value}
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The :first-line Pseudo-element
The "first-line" pseudo-element is used to add special styles to the first line
of the text in a selector:
p:first-line {color:#0000ff;font-variant:small-caps}
<p>Some text that ends up on two or more lines</p>
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The output could be something like this:
Some text that ends
up on two or more lines
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In the example above the browser displays the first line formatted according
to the "first-line" pseudo element. Where the browser breaks the line
depends on the size of the browser window.
Note: The "first-line" pseudo-element can only be used with block-level
elements.
Note: The following properties apply to the "first-line" pseudo-element:
- font properties
- color properties
- background properties
- word-spacing
- letter-spacing
- text-decoration
- vertical-align
- text-transform
- line-height
- clear
The :first-letter Pseudo-element
The "first-letter" pseudo-element is used to add special style to the first
letter of the text in a selector:
p:first-letter {color:#ff0000;font-size:xx-large}
<p>The first words of an article...</p>
|
The output could be something like this:
The first words of an article... |
Note:
The "first-letter" pseudo-element can only be used with block-level elements.
Note: The following properties apply to the "first-letter" pseudo- element:
- font properties
- color properties
- background properties
- margin properties
- padding properties
- border properties
- text-decoration
- vertical-align (only if "float" is "none")
- text-transform
- line-height
- float
- clear
Pseudo-elements and CSS Classes
Pseudo-elements can be combined with CSS classes:
p.article:first-letter {color:#ff0000}
<p class="article">A paragraph in an article</p>
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The example above will make the first letter of all paragraphs with class="article" red.
Multiple Pseudo-elements
Several pseudo-elements can be combined:
p:first-letter {color:#ff0000;font-size:xx-large}
p:first-line {color:#0000ff}
<p>The first words of an article...</p>
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The output could be something like this:
The first
words of an
article...
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In the example above the first letter of the paragraph will be red with a font size of 24pt. The rest of the first line
would be blue while the rest of the paragraph would be the default color.
CSS2 - The :before Pseudo-element
The ":before" pseudo-element can be used to insert some content before
the content of an element.
The style below will play a sound before each occurrence of an <h1> element:
h1:before
{
content: url(beep.wav)
}
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CSS2 - The :after Pseudo-element
The ":after" pseudo-element can be used to insert some content
after the content of an element.
The style below will play a sound after each occurrence of an <h1> element:
h1:after
{
content: url(beep.wav)
}
|
Pseudo-elements
Browser support: IE: Internet Explorer, F: Firefox, N: Netscape.
W3C: The number in the "W3C" column indicates in which CSS recommendation
the property is defined (CSS1 or CSS2).
Pseudo-element |
Purpose |
IE |
F |
N |
W3C |
:first-letter |
Adds special style to the first letter
of a text |
5 |
1 |
8 |
1 |
:first-line |
Adds special style to the first line
of a text |
5 |
1 |
8 |
1 |
:before |
Inserts some content before the content of an element |
|
1.5 |
8 |
2 |
:after |
Inserts some content after the content of an element |
|
1.5 |
8 |
2 |
|
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