typescript eslint rules. no-unused-vars#options for functions that return void

Question

Consider this interface:

/*eslint no-unused-vars: ["warn", { "args": "after-used" }]*/
interface Whatever {
    x: number,
    y: number,
    myFunc: (arg1: number, arg2: string[]) => void // warning here
}

I get warnings:

1.- 'arg1' is defined but never used.eslintno-unused-vars
2.- 'arg2' is defined but never used.eslintno-unused-vars

I want my linter to check for variable usage in TS, but of course if function returns void, the variable wont be used in the type.

I'm surprised that that specific case cannot be arranged in the documentation. I mean the specific case of check the variable usage in the type, but not if the function returns void.

Answer 1

General principle:

If some JS eslint rule conflicts with TS, disable JS rule

In many cases TS rule may conflict with JS rule with same name

https://typescript-eslint.io/rules/no-unused-vars/

How to Use

// .eslintrc.cjs
module.exports = {
  "rules": {
    // Note: you must disable the base rule as it can report incorrect errors
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": "warn"
  }
};