Does CSS Have a :blur Selector for Styling Elements That Lose Focus?

CSS's Focus and Blur States: The Availability of :blur Selector

In CSS, the :focus pseudo-class allows us to apply styles to elements that are in focus, such as input fields or buttons. However, many may wonder if CSS has a corresponding :blur pseudo-class for elements that have lost focus.

The answer is that there is no :blur pseudo-class in CSS.

In CSS, pseudo-classes, including :focus, represent the current state of an element. While the :focus pseudo-class indicates an element's focused state, there isn't a way to explicitly define styles for an element that is losing focus or has lost focus.

This limitation is consistent with CSS's approach to representing states rather than events. Pseudo-classes like :focus, :hover, and :active are not designed to trigger styles based on transitions between states. Instead, they represent a particular state that an element is currently in.

In order to style elements that are not in focus, you can use CSS techniques such as the following:

• Using :not(:focus): This approach allows you to target elements that do not have focus, but it has less browser support.
• Overriding Styles with :focus: You can define general styles for all elements and then override them with specific styles for elements that have focus.

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