I wrote an article last year, Consider Using TypeScript, to explain some of the benefits of using TypeScript and I'm just curious for those in the JS ecosystem if you use a language like TypeScript, Reason ML, or Facebook's Flow type checker.
If you currently don't use one of the above, are you considering trying one of them? If you did try or use one of them, what kinds of issues, if any did you have? Difficult to setup? Learning curve etc.
My professional experience with React has pretty much been all with TypeScript. It is a pain sometimes getting set up initially, but once you get going it's great. There are hiccups with package updates sometimes because type definitions aren't in sync,— Nick Taylor (he/him) (@nickytonline) March 10, 2018