You don't need to use any of these verticals - you can just write a .js file and serve it without any modifications, linting, etc. But if you want to? Each ver

You don't need to use any of these verticals - you can just write a .js file and serve it without any modifications, linting, etc. But if you want to? Each vertical has a de-facto community standard at this point. If you want typechecking, it's TS. If you want formatting, it's Prettier. Etc. And of course, nobody's captured 100% of any of these verticals - there are plenty of people who use Flow o Reason for typechecking, or "StandardJS" for formatting. But a new person setting up a JS project can just install the community standards at this point and be fine (albeit bothered at configuring things, if they don't use c-r-a).