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lets say I have a custom tag with an optional boolean attribute.
That attribute has also a default-value of false.
To use it, the dev would write something like
Is there a way to define that the ="true"-part is not nesscasary? So that <xyz:mytag optAttr /> is equal to <xyz:mytag optAttr="true" /> ?
At least for checkboxes in HTML this is quite common.
No, it’s not possible.
JSP custom tags strictly follow XML syntax where this kind of declaration is not allowed (unlike HTML).