Typing React Components

We live in the strange time when almost all programming languages are moving towards static type systems. There are some rumors that Python and Ruby are going to become static type. And JavaScript is no exception.

There are some options for making JS type safe: TypeScript, Dart, and Flow. I don’t like Dart because of its non-JS appearance. It looks like Java or something similar, but not JS. And of course it’s not really popular in the JS community.

Another option is TypeScript. In comparison with Flow, in TypeScript, you have to write all of your project from the beginning, whereas you can apply Flow gradually. And because TypeScript is NOT JavaScript, it cannot follow the ECMAScript standard, and of course not all libraries are available for TypeScript.

The final option is Flow. It is really amazing! It covers the entire spectrum of typing tools you need, such as type aliases, type inference, type unions, etc.