core.js

import { defineConfig } from 'oxlint';

/**
 * Core rules shared across all presets.
 *
 * Only includes non-formatting rules that oxlint supports.
 * Formatting rules (spacing, semicolons, indentation, etc.) are intentionally
 * omitted — use oxfmt for those.
 *
 * Rules not available in oxlint are documented in the README.
 */
export default defineConfig({
  plugins: ['import', 'node'],
  env: { es2024: true, jest: true },
  globals: {
    console: 'readonly',
    exports: 'readonly',
    global: 'readonly',
    module: 'readonly',
    require: 'readonly',
  },
  rules: {
    curly: ['warn', 'all'],
    'constructor-super': 'warn',
    eqeqeq: ['warn', 'smart'],
    'getter-return': 'warn',
    'no-alert': 'off',
    'no-array-constructor': 'warn',
    'no-caller': 'warn',
    'no-case-declarations': 'warn',
    'no-compare-neg-zero': 'warn',
    'no-cond-assign': 'warn',
    'no-const-assign': 'error',
    'no-constant-condition': ['warn', { checkLoops: false }],
    'no-control-regex': 'off',
    'no-debugger': 'warn',
    'no-delete-var': 'error',
    'no-dupe-class-members': 'error',
    'no-dupe-keys': 'error',
    'no-duplicate-case': 'error',
    'no-empty-character-class': 'warn',
    'no-empty-pattern': 'warn',
    'no-eval': 'warn',
    'no-ex-assign': 'warn',
    'no-extend-native': 'warn',
    'no-extra-bind': 'warn',
    'no-extra-boolean-cast': 'warn',
    'no-fallthrough': 'warn',
    'no-func-assign': 'error',
    'no-global-assign': 'warn',
    'no-inner-declarations': 'warn',
    'no-invalid-regexp': 'error',
    'no-irregular-whitespace': 'warn',
    'no-iterator': 'warn',
    'no-label-var': 'warn',
    'no-labels': ['warn', { allowLoop: true, allowSwitch: true }],
    'no-lone-blocks': 'warn',
    'no-multi-assign': 'warn',
    'no-new': 'warn',
    'no-new-func': 'warn',
    'no-new-native-nonconstructor': 'warn',
    'no-object-constructor': 'warn',
    'no-obj-calls': 'warn',
    'no-proto': 'warn',
    'no-redeclare': 'warn',
    'no-return-assign': 'warn',
    'no-script-url': 'warn',
    'no-self-assign': 'warn',
    'no-self-compare': 'warn',
    'no-sequences': 'warn',
    'no-shadow-restricted-names': 'warn',
    'no-sparse-arrays': 'warn',
    'no-this-before-super': 'warn',
    'no-throw-literal': 'warn',
    'no-undef': 'error',
    'no-unexpected-multiline': 'warn',
    'no-unneeded-ternary': 'warn',
    'no-unreachable': 'warn',
    'no-unsafe-negation': 'warn',
    'no-unused-expressions': ['warn', { allowShortCircuit: true, enforceForJSX: true }],
    'no-unused-labels': 'warn',
    'no-unused-vars': [
      'warn',
      {
        vars: 'all',
        args: 'none',
        ignoreRestSiblings: true,
        caughtErrors: 'all',
        caughtErrorsIgnorePattern: '^_',
      },
    ],
    'no-useless-computed-key': 'warn',
    'no-useless-concat': 'warn',
    'no-useless-constructor': 'warn',
    'no-useless-escape': 'warn',
    'no-useless-rename': 'warn',
    'no-useless-return': 'warn',
    'no-var': 'warn',
    'no-void': 'warn',
    'no-with': 'warn',
    'object-shorthand': 'warn',
    'prefer-const': ['warn', { destructuring: 'all', ignoreReadBeforeAssign: true }],
    'prefer-promise-reject-errors': 'warn',
    'prefer-rest-params': 'warn',
    'prefer-spread': 'warn',
    radix: 'warn',
    'unicode-bom': ['warn', 'never'],
    'use-isnan': 'error',
    'valid-typeof': 'error',
    yoda: ['warn', 'never', { exceptRange: true }],

    'import/default': 'off',
    'import/export': 'error',
    'import/first': 'warn',
    'import/namespace': ['error', { allowComputed: true }],
    'import/no-duplicates': 'error',
    // import/order is not supported by oxlint — see README

    'node/handle-callback-err': ['warn', '^(e|err|error|.+Error)$'],
    'node/no-new-require': 'warn',
  },
});