Allow customization of icons

Currently, the iconset is tied to Font Awesome. Ideally, we would also allow the customization of these icons. Could possibly set this as a property to the tree itself or allow the specification via :before CSS property.

[imkevinjones]

Yeah mate, that’s exactly what I was thinking. I’ve got a modified version of react-checkbox-tree that has both node-level defined icons and pessimistic/optimistic toggling. It’s provided incredible flexibility. Fantastic work on this library, BTW. Best React checkbox library available.

[jakezatecky]

@Gillingham A primary reason things were shifted to CSS was to decouple the dependency on Font Awesome from the markup, and to not require that user add boilerplate properties to the component itself when it could be achieved in achieved in CSS. If you have existing classes, you can always use the @extends syntax or equivalent in your CSS preprocessor and override the library’s classes.

Markup-level specification can be added to this component, but I am curious as to which icons you would find useful to alter. I can add support for all icons similar to my earlier comment, but I do not know if anyone finds value in changing ALL of them.

If we add support for the above, the CSS option would still exist as the preferred alternative, so we would have full backward compatibility. The newer specification would potentially more exotic icon configuration, but the developer would have to be aware that significant deviations might make the icons mis-align.