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<!DOCTYPE html> <html> <head> <style> input:user-invalid { border: 2px solid red; background-color: beige; } input:user-invalid + span::before { content: "X"; color: red; } </style> </head> <body> <h1>Demo of :user-invalid</h1> <p>Try typing an illegal e-mail address.</p> <p>Try typing an illegal number.</p> <form> <label for="name">Name: </label><br> <input id="name" name="name" type="text" /><br> <label for="email">Email: </label><br> <input id="email" name="email" type="email" required /> <span></span> <p>Input a number between 1 and 10: <input type="number" min="1" max="10" /></p> </form> </body> </html>
