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React Dropdown: http://react.carbondesignsystem.com/?selectedKind=Dropdown&selectedStory=Default&full=0&addons=1&stories=1&panelRight=0&addonPanel=storybook%2Fstories%2Fstories-panel
Vanilla Dropdown: https://www.carbondesignsystem.com/components/dropdown/code
(Notice arrow keys don't work in Vanilla.)
Documentation for React Components is not ideal.
The documentation for the library on https://www.carbondesignsystem.com/components/overview is Vanilla JS forward, all documentation for React is done in Storybook (which is fine, but definitely not as good as the rest of their documentation).
Misc
- Modal override wasn’t so hard. Modal places focus on an element inside it, you can specify a selector to change the default focus (defaults to primary button). In the data table case this can be clunky.
- Theming with CSS seems to be mostly colors. The rest of the css is pretty opaque. I’d say this is a component library only – not a CSS Framework + Component Library.