CSS :autofill

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Autofilling HTML input elements is a frequent user action that can drastically improve user experience. Hell, we all autofill for our passwords and address information. But what control do we have when input elements have been autofilled?

To add custom CSS styles to inputs whose contents have been autofilled by the browser, you can use the :autofill pseudo-class:

input:autofill {
    border: 2px solid orange;
}

I'm really happy that browsers allow site and app developers to customize the styling of elements that have been changed by the browser. Autofill, to a degree, is an unnatural act, so signaling to that the value in an input was changed without control is important.

Since different browsers and operating systems sometimes style autofilled elements differently, :autofill is hugely beneficial!

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