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https://www.jeasyui.com/documentation5/index.php many component docs list as "extends LocaleBase", but LocaleBase isn't documented. does it really have no useful properties?
Messager for example shows this, but in the Demos the custom example shows using borderType and showHeader, which after some poking leads me to believe it actually Extends from Dialog.
MenuButton does not list onMenuItemClick in the docs or demos at all, I found it using the React Developer Tools for Chrome, and this prop is the only way I was able to make menus under the button register a click event.