Maybe I haven't tried hard enough, but it was a pain doing JSX/Typescript with mithril. All the TSX tooling expects a React API and if you use something else you get a ton of annoying type errors.
I used TSX with Cycle.js for a while and didn't experience too much trouble. Typescript has some simple compiler options to change how it generates JSX or JS and doesn't bundle any types out of the box for TSX: all of the React API types come from React's type library. Sometimes that was more of detriment than if there were base types in TSX because reimplementing mostly the same set of standard HTML elements and HTML-like attributes a third time in a different .d.ts file when switching VirtualDOM implementations was a chore. (It was fine, but it was a chore.)
If you are seeing errors that are React specific, most likely means you just need a subtle tweak in your tsconfig.json.
