Hacker News Reader

It's great that you always write bug free code, but then typescript was not written for you, it was written for the rest of us who write the occasional bug, refactor an API that we didn't realize another developer was using, or can't quite remember the order or shape of args that a library call takes that we only use once every 6 months.

View on HN

Why don't your tests catch your TypeErrors? You do have tests don't you?

Tests aren't an alternative to types. They're better together.

Why would you write a test instead of a type declaration if you had the choice?

TS checks at buildtime. It can't guard against runtime TypeErrors because JavaScript is a dynamic language (despite all the effort to "fix" that). Tests can catch all TypeErrors, TS can't. Why use two tools to do the job that one can do alone?

Reply on news.ycombinator.com