:focus
A pseudo-class that targets an element that has been selected (e.g., clicked or tabbed to) and is ready to receive input.
Quick example
input:focus {
/* Changes background color when the user selects the input */
background-color: #f3f4f6;
outline: none;
border: 1px solid #3b82f6;
}:focus Browser Support
Widely available Since 2015 96% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.
Safe to use without fallbacks.
1+
1+
1+
12+