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How to Style Invalid Inputs in CSS

How to Style Invalid Inputs in CSS

Ferenc Almasi β€’ 2020 November 18 β€’ Read time 1 min read
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CSS

You can style input elements with CSS based on their validity with the in-range and out-of-range pseudo-class selectors:

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<!-- πŸ“— This will make the background of the input green -->
<style>
    input:in-range {
        background-color: green;
    }
</style>

<input type="number" min="1" max="10" value="5" />
in-range.html
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<!-- πŸ“• This will make the background of the input red -->
<style>
    input:out-of-range {
        background-color: red;
        border: 2px solid red;
    }
</style>

<input type="number" min="1" max="10" value="12" />
out-of-range.html

Make sure you always give feedback to your users about the action they take.

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