This is probably out of scope for this repo, but I cannot use styled-components with this as there are of course no syntax definitions for it. For .tsx files it'd be nice to support styled-components and I suppose, for other people, other CSS types commonly used in React projects.

As far as I know this need not be included in .ts, purely .tsx TypeScriptReact since React complains if you use JSX with TypeScript in anything other than a .tsx extension file, whereas for pure JS and JSX it's only a convention that JSX is in .jsx files.