Basic CSS Pseudo-Elements

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Pseudo-elements in CSS: what are they and why are they needed

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October 9, 2024

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Pseudo-elements in CSS: what are they and why are they needed
Content

1.
Basic CSS Pseudo-Elements
2.
Layering One Element on Another with CSS
3.
Placeholder and what do pseudo-elements have to do with it
4.
Difference between pseudo-classes and pseudo-elements
5.
Useful links
Anna Ostanina
Anna Ostanina
Skillfactory author, understands complex topics and explains them in simple terms

CSS is a language used to describe the appearance and formatting of elements on web pages, such as making a pretty font or placing an image in the right place. Learning pseudo-elements is the next step in becoming a web developer; it's worth understanding the basics of CSS and HTML first.

Pseudo-elements in CSS are special elements that do not exist in the original HTML code. That is why they are called "pseudo" - they are kind of there, but they are not there.Most often, pseudo-elements are needed for styling. For example, with the help of pseudo-elements, you can highlight the first letter of a paragraph, customize the display of the first line, or put a so-called overlay (overlapping layer) on top of an image.

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In this article, we will look at the main types of costa rica telegram data pseudo-elements, look at examples of use, study additional tools for changing the interface and answer the main question - how do pseudo-elements differ from CSS pseudo-classes.

The general syntax for pseudo-elements is as follows:

selector ::pseudo-element {
property : value;
}
Keywords with double colons are pseudo-elements that indicate their functionality with their names. There are many CSS pseudo-elements that perform different functions, but not all of them are supported equally by all browsers. So let's look at the most basic ones and apply them with the help of a CSS tutorial :

::before — adds content before an element. This is useful when you need to insert some symbol or decorative element before the text.


Example of inserting emoji before text using ::before. Source: author
::after - adds content after the element, similar to ::before, but at the end.

Example of inserting emoji after text using ::after
Example of inserting emoji after text using ::after. Source: author
The syntax of both pseudo-elements ::before and ::after necessarily includes the content property.