@mkaradeniz/oxlint-plugin-nullability

Oxlint rules for making nullability checks explicit.

Install

pnpm add -D @mkaradeniz/oxlint-plugin-nullability

Usage

import { defineConfig } from 'oxlint';

export default defineConfig({
  jsPlugins: [
    {
      name: '@mkaradeniz/nullability',
      specifier: '@mkaradeniz/oxlint-plugin-nullability',
    },
  ],
  rules: {
    '@mkaradeniz/nullability/prefer-is-not-null-or-undefined': ['warn'],
  },
});

Rules

• @mkaradeniz/nullability/prefer-is-not-null-or-undefined: reports syntactically obvious nullability checks that should use isNotNullOrUndefined from is-not-null-or-undefined.

This rule is annotation-aware, not powered by Oxlint's native --type-aware mode. Oxlint does not yet expose type information to custom JS plugins. Full semantic type-aware support is tracked upstream in oxc-project/oxc#19596, with broader JS plugin work tracked in oxc-project/oxc#19918.