Message in Chinese (Traditional) (中文(繁體))![](/img/flags/zh-Hant.png)
required 屬性必須有屬於 yes 或 no 的值。
Unlocalized message![](/img/flags/en.png)
The required attribute must have a value of yes or no.
Search by Googlerequired 屬性必須有屬於 yes 或 no 的值。
The required attribute must have a value of yes or no.
Search by Google