eslint.config.mjs

import importPlugin from 'eslint-plugin-import';
import tsStylistic from '@stylistic/eslint-plugin-ts';
import eslint from '@eslint/js';
import globals from 'globals';
import tsEslint from 'typescript-eslint';

export default tsEslint.config(
  {
    ignores: ['**/node_modules', '**/dist', '**/coverage', '**/*.{js,mjs}', '**/*.d.ts'],
  },
  eslint.configs.recommended,
  tsEslint.configs.recommended,
  {
    plugins: {
      '@typescript-eslint': tsEslint.plugin,
      import: importPlugin,
      '@stylistic': tsStylistic,
    },
    languageOptions: {
      globals: {
        ...globals.browser,
        ...globals.node,
      },
      parser: tsEslint.parser,
      ecmaVersion: 2023,
      sourceType: 'module',
      parserOptions: {
        project: 'tsconfig.json',
      },
    },
    rules: {
      '@typescript-eslint/consistent-type-imports': 'error',
      '@typescript-eslint/prefer-optional-chain': 'error',
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-floating-promises': ['error', { checkThenables: false }],
      '@typescript-eslint/ban-types': 'off',
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/no-non-null-assertion': 'off',
      '@typescript-eslint/no-unsafe-declaration-merging': 'off',
      '@typescript-eslint/ban-ts-comment': 'off',
      '@typescript-eslint/no-unused-vars': 'off',
      '@typescript-eslint/naming-convention': ['error', {
        selector: 'default', format: null,
      }, {
        selector: 'variable', format: ['camelCase', 'PascalCase', 'UPPER_CASE'],
      }, {
        selector: 'typeLike', format: ['PascalCase'],
      }],
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-empty-interface': 'off',
      '@typescript-eslint/adjacent-overload-signatures': 'error',
      '@typescript-eslint/consistent-type-assertions': 'error',
      '@typescript-eslint/no-array-constructor': 'error',
      '@typescript-eslint/no-empty-function': 'error',
      '@typescript-eslint/no-inferrable-types': 'error',
      '@typescript-eslint/no-misused-new': 'error',
      '@typescript-eslint/no-namespace': ['error', { allowDeclarations: true }],
      '@typescript-eslint/no-this-alias': 'error',
      '@typescript-eslint/no-use-before-define': 'error',
      '@typescript-eslint/no-var-requires': 'error',
      '@typescript-eslint/triple-slash-reference': 'error',
      '@stylistic/type-annotation-spacing': 'error',
      '@typescript-eslint/array-type': 'error',
      '@typescript-eslint/no-unnecessary-qualifier': 'error',
      '@typescript-eslint/no-unnecessary-type-arguments': 'off',
      '@typescript-eslint/no-require-imports': 'off',
      '@typescript-eslint/no-empty-object-type': 'off',
      '@typescript-eslint/no-unsafe-function-type': 'off',
      '@stylistic/quotes': ['error', 'single', { avoidEscape: true, allowTemplateLiterals: true }],
      '@stylistic/semi': ['error', 'always'],
      '@typescript-eslint/no-useless-constructor': 'error',
      '@typescript-eslint/no-redeclare': ['error'],
      '@stylistic/member-delimiter-style': ['error', {
        multiline: { delimiter: 'semi', requireLast: true },
        singleline: { delimiter: 'semi', requireLast: false },
      }],
      '@stylistic/space-before-function-paren': ['error', {
        anonymous: 'always',
        named: 'never',
        asyncArrow: 'always',
      }],
      '@stylistic/space-infix-ops': 'error',
      '@stylistic/comma-spacing': 'error',
      'arrow-parens': ['error', 'as-needed'],
      'arrow-spacing': 'error',
      'space-infix-ops': 'off',
      'no-var': 'error',
      'prefer-const': 'error',
      'prefer-rest-params': 'error',
      'prefer-spread': 'error',
      'constructor-super': 'error',
      'for-direction': 'error',
      'getter-return': 'error',
      'import/no-duplicates': ['error', { 'prefer-inline': true }],
      'no-async-promise-executor': 'error',
      'no-case-declarations': 'error',
      'no-class-assign': 'error',
      'no-compare-neg-zero': 'error',
      'no-cond-assign': 'error',
      'no-const-assign': 'error',
      'no-constant-condition': 'error',
      'no-control-regex': 'error',
      'no-debugger': 'error',
      'no-delete-var': 'error',
      'no-dupe-args': 'error',
      'no-dupe-keys': 'error',
      'no-duplicate-case': 'error',
      'no-empty': 'error',
      'no-empty-character-class': 'error',
      'no-empty-pattern': 'error',
      'no-ex-assign': 'error',
      'no-extra-boolean-cast': 'error',
      'no-extra-semi': 'error',
      'no-fallthrough': 'error',
      'no-func-assign': 'error',
      'no-global-assign': 'error',
      'no-inner-declarations': 'error',
      'no-invalid-regexp': 'error',
      'no-irregular-whitespace': 'error',
      'no-misleading-character-class': 'error',
      'no-mixed-spaces-and-tabs': 'error',
      'no-new-symbol': 'error',
      'no-obj-calls': 'error',
      'no-octal': 'error',
      'no-prototype-builtins': 'error',
      'no-redeclare': 'off',
      'no-regex-spaces': 'error',
      'no-self-assign': 'error',
      'no-shadow-restricted-names': 'error',
      'no-sparse-arrays': 'error',
      'no-this-before-super': 'error',
      'no-undef': 'error',
      'no-unexpected-multiline': 'error',
      'no-unreachable': 'error',
      'no-unsafe-finally': 'error',
      'no-unsafe-negation': 'error',
      'no-unused-labels': 'error',
      'no-useless-catch': 'error',
      'no-useless-escape': 'error',
      'no-with': 'error',
      'require-yield': 'error',
      'use-isnan': 'error',
      'valid-typeof': 'error',
      'comma-dangle': ['error', 'always-multiline'],
      'dot-notation': 'error',
      'eol-last': 'error',
      eqeqeq: ['error', 'always', { null: 'ignore' }],
      'no-console': 'error',
      'no-duplicate-imports': 'off',
      'no-multiple-empty-lines': 'error',
      'no-throw-literal': 'error',
      'no-trailing-spaces': 'error',
      'no-undef-init': 'error',
      'object-shorthand': 'error',
      'quote-props': ['error', 'consistent-as-needed'],
      'spaced-comment': 'error',
      yoda: 'error',
      curly: 'error',
      'object-curly-spacing': ['error', 'always'],
      'lines-between-class-members': ['error', 'always', { exceptAfterSingleLine: true }],
      'padded-blocks': ['error', { classes: 'always' }],
      'no-else-return': 'error',
      'block-spacing': ['error', 'always'],
      'space-before-blocks': ['error', 'always'],
      'brace-style': ['error', '1tbs', { allowSingleLine: true }],
      'keyword-spacing': ['error', { before: true, after: true }],
      'space-in-parens': ['error', 'never'],
    },
  },
  {
    files: ['tests/**/*'],
    languageOptions: {
      globals: {
        ...globals.jest,
      },
      parserOptions: {
        project: 'tests/tsconfig.json',
      },
    },
    rules: {
      '@typescript-eslint/no-inferrable-types': 'off',
      '@typescript-eslint/no-use-before-define': 'off',
      '@typescript-eslint/no-var-requires': 'off',
      '@typescript-eslint/consistent-type-imports': 'off',
      'no-console': ['error', { allow: ['time', 'timeEnd'] }],
      'no-control-regex': 'off',
      'no-empty': 'off',
      'import/no-duplicates': 'off',
    },
  },
);