CSS :out-of-range

One aspect of web development I've always loathed was working with forms. Form elements have been traditionally difficult to style due to OS and browser differences, and validation can be a nightmare. Luckily the native HTML APIs added methods for improving the form validation situation. With input[type=number] elements, you can add min and max attributes. Those attributes are great but the browse

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<input type="number"> 要素の値が、min 属性および max 属性の範囲から外れている場合にマッチする擬似セレクタ :out-of-range について。