關於「Html required message」標籤，搜尋引擎有相關的訊息討論：

changing the language of error message in required field in html5 ...stackoverflow.com › questions › changing-the-language-o...[HTML] - How to make a required form input with a messagewww.shecodes.io › athena › 120623-how-to-make-a-requi...HTML attribute: required - HTML: Hyper