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The :in-range pseudo selector in CSS matches input elements when their value is within the range specified as being acceptable.

<input type="number" min="5" max="10">
input:in-range {
  border: 5px solid green;
}

I believe it’s only relevant on input[type=number]. Range inputs don’t allow values outside their min/max and it doesn’t make much sense on any other type of input. Perhaps text-y inputs with a maxlength, but the behavior on those in most browsers is to prevent entry past the max anyway.

Browser Support

Chrome Safari Firefox Opera IE Android iOS
10+ 5.2+ 19- 11+ 10- 2.3+ 4+