@typescript-eslint/no-unused-vars: Do not report reserved interfaces

[marekdedic]

Description

Hi, as per this RFC, the interface names $$Props, $$Events, $$Slots are reserved and have a special meaning inside a svelte component. Therefore, they probably shouldn't be reported by @typescript-eslint/no-unused-vars.

[ota-meshi]

Thank you for posting issue.

I think the parser needs to be fixed to make no-unused-vars work.

The RFC hasn't been merged yet, so I think it should be an option as an experimental feature.
sveltejs/rfcs#38

[devunt]

For now I'm using following configuration in .eslintrc.cjs. This can provide a quick workaround before RFC lands.

        '@typescript-eslint/no-unused-vars': [
          'warn',
          { varsIgnorePattern: '^\\$\\$(Props|Events|Slots)$' },
        ],

[connerdassen]

What about $$Generic?
I get '$$Generic' is not defined eslint(no-undef).
This can be fixed by adding globals: {$$Generic: "readable"} to my eslint config, but it leads to problems further on because the type becomes "any", leading to a bunch of "any" usage related errors

[ota-meshi]

Welcome pull request

[Razunter]

Not directly related, but how to handle imported stores?

This throws no-unused-vars:

import {store} from '@js/stores/globalStores'

$store = 'abc'

[marekdedic]

I am closing this as it is irrelevant with Svelte 5 - generics are handled differently and slots and events are deprecated, so it probably isn't worth it supporting these...