OTP

One Time Password (OTP) helps in confirming one's phone number. It can used in the following ways:

• Two-factor authentication
• Phone number verification
• Account recovery
• Payment confirmation

OTP is not as robust as WebAuthn method though.

Some best practices when implementing OTP using the input element:

• type="text" instead of type="number"
• inputmode="numeric"
• autocomplete="one-time-code"

JavaScript code can be used to wait for the SMS and complete the input using Web OTP API.