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<p>A form with a password field that must contain 8 or more characters that are of at least one number, and one uppercase and lowercase letter:</p>
<form action="https://www.w3schools.com/action_page.php">
Password: <input type="password" name="pw" pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,}" title="Must contain at least one number and one uppercase and lowercase letter, and at least 8 or more characters">
<input type="submit">
</form>
<p><strong>Note:</strong> The pattern attribute of the input tag is not supported in Internet Explorer 9 and earlier versions.</p>
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