Using a Query
A CSS pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s). For example, :hover can be used to change a button’s color when the user’s pointer hovers over it.
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Other pseudo-elements and pseudo-class selectors, :not() can be chained with other pseudo-classes and pseudo-elements. For example, the following will add a “New!” word to list items that do not have a .old class name, using the ::after
Trivia & Notes
The :not() selector is chainable with more :not() selectors. For example, the following will match all articles except the one with an ID #featured, and then will filter out the articles with a class name .tutorial:
On the Specificity of Selectors
The specificity of the :not() pseudo-class is the specificity of its argument. The :not() pseudo-class does not add to the selector specificity, unlike other pseudo-classes.
The simple selector that :not() takes as an argument can be any of the following:
- Type selector (e.g p, span, etc.)
- Class selector (e.g .element, .sidebar, etc.)
- ID selector (e.g #header)
- Pseudo-class selector (e.g :first-child, :last-of-type)
Note: The :not() pseudo-class is not supported in Internet Explorer 8 and earlier versions.