corejsf:spinner Tag Attributes
- minimum, maximum: to assign a range of valid values
- size: size of the spinner's text field
- value: the value of the spinner as a string or value expression
(e.g. "#{someBean.someProperty}"
- binding, id, rendered: basic JSF attributes provided by framework
Only the value attribute is required.
Users of custom tags do not need to know how they are implemented.
Expectation: a few skilled programmers create tags to be used by many
developers.