Can anyone recommend a good resource for generating HTML input patterns or provide guidance on how to create them? Specifically, I am looking for a pattern that ensures the input of an '@' symbol.
<form method="post" action="#">
<input type="text" class="form" placeholder="Name" name="name"><br><br>
<input type="text" class="form" placeholder="Email" name="email" pattern=''>
<input value="@#" class="form" placeholder='@#' name="type" readonly><br><br>
<input type="text" class="form" placeholder="Backup Email" name="b_email" pattern=''><br><br>
<input type="text" class="form" placeholder=Username name="username"><br><br>
<input type="password" class="form" placeholder="Password" name="password"><br><br>
<input type="password" class="form" placeholder="Confirm Password" name="password_con"><br><br>
<button class="form">Create</button>
</form><br><br>
Unfortunately, I haven't been able to find comprehensive guides on this topic, so any help would be greatly appreciated!