The HTML (ARIA and ARIA-associated attributes displayed in green) <form action=""> <fieldset> <legend>Login form</legend> <div> <label for="username">Your username</label> <input type="text" id="username" aria-describedby="username-tip" required /> <div role="tooltip" id="username-tip">Your username is your email address</div> </div> <div> <label for="password">Your password</label> <input type="t