SMS OTP フォームのベストプラクティス
https://www.youtube.com/watch?v=sU4MpWYrGSI&t=300s
SMS OTP, One Time Password
https://web.dev/sms-otp-form/
To provide the best user experience with the SMS OTP, follow these steps:
Use the <input> element with:
type="text"
inputmode="numeric"
autocomplete="one-time-code"
Use @BOUND_DOMAIN #OTP_CODE as the last line of the OTP SMS message.
Use the Web OTP API.
from Chrome Dev Summit 2020