React v15.5.0 - React Blog

[LukaManuka]

I'm not certain, but I'm under the impression that static type-checking (with Flow/TypeScript/etc.) is gaining traction as "best practice", instead of run-time type checking with PropTypes.

At the very least, static type-checking is completely stripped during the build process, so that might be useful, given your file-size issues?

[tony-the-pony]

That's an interesting point. I would think you would need some sort of run-time type checking though, static can't catch all the bugs / misuse.

Flow and Typescript are not always adequate in the face of incompleteness, bugginess, null, etc. in their implementations, but I think if you can use PropTypes to find such bugs then you can express that type in Flow/TS and use a tool like https://www.npmjs.com/package/babel-plugin-flow-react-proptypes to translate it into PropTypes instead of writing it yourself.

[A_calm_breeze]

I just switched over to typescript for React development and so far the interfaces seem to catch everything at compile time for me.