ban-unused-ignore

NOTE: this rule is part of the recommended rule set.

Enable full set in deno.json:

{
  "lint": {
    "rules": {
      "tags": ["recommended"]
    }
  }
}

Enable full set using the Deno CLI:

deno lint --rules-tags=recommended

This rule can be explictly included to or excluded from the rules present in the current tag by adding it to the include or exclude array in deno.json:

{
  "lint": {
    "rules": {
      "include": ["ban-unused-ignore"],
      "exclude": ["ban-unused-ignore"]
    }
  }
}

Warns unused ignore directives.

We sometimes have to suppress and ignore lint errors for some reasons and we can do so using ignore directives.

In some cases, however, like after refactoring, we may end up having ignore directives that are no longer necessary. Such superfluous ignore directives are likely to confuse future code readers, and to make matters worse, might hide future lint errors unintentionally. To prevent such situations, this rule detects unused, superfluous ignore directives.

Invalid:

// `export` counts as a use, so `foo` is not actually unused and the
// directive below suppresses nothing. This rule flags it as superfluous.
// deno-lint-ignore no-unused-vars
export const foo = 42;

Valid:

// The directive is unnecessary here, so it is simply removed.
export const foo = 42;

// Here the directive is doing real work: `bar` is genuinely unused, so the
// no-unused-vars directive is necessary and ban-unused-ignore leaves it alone.
// deno-lint-ignore no-unused-vars
const bar = 42;

Did you find what you needed?