proposal-types-as-comments VS typescript-eslint

As per the proposal:

Not runtime ones. https://github.com/giltayar/proposal-types-as-comments/issues/45

I do wonder about a future where JavaScript gets non-enforced optional type annotation syntax[1] which is and if said syntax will be slightly incompatible with TypeScript. That would be a little awkward for Deno, wouldn’t it. However I hope that if JS gets type annotation syntax that it would be a strict subset of TypeScript—or at the very least future compatible—for this very reason.

1. https://github.com/giltayar/proposal-types-as-comments

I assumed the joke was about this

It's actually Gil Taylor

The proposal on GitHub

Typescript-eslint can assist in this task. This tool helps identify all instances of unsafe any usage. Specifically, all usages of JSON.parse can be found and it can be ensured that the received data's format is checked. More about getting rid of the any type in a codebase can be read in the article Making TypeScript Truly "Strongly Typed".

> Only lint files that have changed? How hard that is?

Quite hard, especially since type-aware rules from e.g. https://typescript-eslint.io/ mean that changing the type of a variable in file A can break your code in file B, even if file B hasn't changed.

The article only touches this: when converting to TypeScript, `any` is useful, but in the end you don't want this type in your codebase - so don't forget to use typescript-eslint [0] and turn on those no-unsafe-* rules which guard against `any` leaking into your code.

[0] https://github.com/typescript-eslint/typescript-eslint

By convention, React components should be named in PascalCase. @typescript-eslint has the config we need, and though we can't specifically target React components, we can target variables (and set some other conventions while we're at it):