My experience has been with TypeScript, so in this space there are several large projects in OSS land that have been or started using TypeScript. The thread in this tweet names some big ones.
It occurs to me that CSS Blocks and OptiCSS are 100% TypeScript and have been since the first line of code. I know that’s true for Glimmer too. What other open source projects are typescript?
02:16 AM - 26 Apr 2018
On the Flow side, I have less knowledge of projects using it as I don't really work in that space, but I'm aware that FireFox DevTools and spectrum have embraced types with Flow. If you know of other large OSS projects using Flow, please comment.
It is an interesting, albeit controversial, take.
I agree partially with him about it not preventing bugs. TypeScript eliminates certain kinds of bugs: runtime errors due to typos, potentially issues related to type coercion and stuff like assigning a completely different type to a variable because these are caught at transpilation (compile) time. Basically a lot of the same issues that would fail at compile time in strongly type languages like C# or Java.
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