Does CSS Have a :blur Selector?

Is There a :blur Selector in CSS?

CSS provides a robust set of selectors, including the widely used :focus pseudo-class. However, one may wonder if there is a parallel :blur selector.

The Answer:

Despite the existence of :focus, CSS does not offer a :blur pseudo-class.

Explanation:

CSS pseudo-classes represent states of elements within the document tree. They do not directly address events or transitions between states. :focus indicates an element that currently holds focus, but it does not indicate that the element has recently lost focus. The same applies to :hover, which represents an element with a pointing device hovering over it, but does not signify a pointing event itself.

To style elements that are not in focus, there are two primary approaches:

• Negative Selector (Less Browser Support):

input:not(:focus), button:not(:focus) {
    /* Styles for form inputs and buttons that do not have focus */
}

• Two-Rule Approach:

input, button {
    /* Styles for all form inputs and buttons */
}

input:focus, button:focus {
    /* Styles for form inputs and buttons that have focus */
}

By utilizing these techniques, developers can effectively apply styles based on an element's focus status, even without a dedicated :blur pseudo-class.

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