It should work, look at tw-react/src/example.js.meta at master · tiddly-gittly/tw-react · GitHub that accompany the example.tsx,
Also see I export the App component in slate-write/src/slate-write/editor/editor.tsx at master · tiddly-gittly/slate-write · GitHub , and only use it as reactComponent = App;
in slate-write/src/slate-write/editor/index.ts at master · tiddly-gittly/slate-write · GitHub