There are actually a ton of binding already defined here: https://github.com/BuckleTypes https://github.com/BuckleTypes Further, anything already typed with Fl

There are actually a ton of binding already defined here: https://github.com/BuckleTypes https://github.com/BuckleTypes Further, anything already typed with Flow or Typescript can be converted with this. https://github.com/rrdelaney/ReasonablyTyped https://github.com/rrdelaney/ReasonablyTyped Beyond that, defining js types and interop with Reason/BS has probably been the most pleasant experience in a compile-to lang that I've used.