You saw that the generic attr function can be used generically on every element, and that the Form elements have special functions to get their values.
您看到了通用的attr函数可用于每个元素，并且Form元素有获得其值的特殊函数。
Attr method cannot be used now to get property values.
attr方法现在不能用于获取preperty的值。
Interfaces with bean-like methods can be implemented using attr*.
可以使用attr*.
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