re: TypeScript is a waste of time. Change my mind. VIEW POST

re: I think what they were doing is renaming a key in an interface, like going from data.online to data.isOnline

Or adding data.timestamp. With TS you automatically get notified of all the places where this data has to be set and also you now automatically know everywhere you use data that it also has a timestamp property. Also, TS ecosystem goes further than that, you could have Protobuf definitions that might be updated because data is serialized and sent over the network to multiple other services, and with the updated TS typings everyone just knows about this change and can update their code accordingly. And yes, this data interface could be used by hundreds of files across multiple services and git repos.

Vscode refactors plain js just fine. Typescript does not help with that.

Actually, I might be mistaken, but VSCode uses tsserver to better understand your code and do stuff like refactoring, IntelliSense and stuff.

TypeScript isn't only able to perform static type checking on explicit types, it also infers types quite well. It's even possible to write plain JS, enable allowJs and checkJs on your tsconfig.json and let it infer and type-check stuff for you.

This also takes me to another point: in my experience I hardly type stuff other than function parameters; typescript can, usually, infer the rest. So arguments like "you write more code" get a bit weaker, IMHO

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