.eslintrc.js

'use strict';

module.exports = {
  root: true,
  parser: '@babel/eslint-parser',
  parserOptions: {
    sourceType: 'module',
    requireConfigFile: false,
  },
  env: {
    browser: false,
    node: true,
    es6: true,
  },
  extends: [
    'eslint:recommended',
    'plugin:eslint-comments/recommended',
    'plugin:jsdoc/recommended',
    'plugin:unicorn/recommended',
    'prettier',
  ],
  plugins: ['jsdoc', 'unicorn'],
  reportUnusedDisableDirectives: true,
  rules: {
    'eslint-comments/disable-enable-pair': ['error', { allowWholeFile: true }],
    'eslint-comments/no-unused-disable': 'error',
    'jsdoc/check-param-names': 'off',
    'jsdoc/newline-after-description': 'off',
    'jsdoc/require-jsdoc': ['error', { publicOnly: true }],
    'jsdoc/require-returns': 'off',
    'jsdoc/require-returns-type': 'off',
    'jsdoc/require-param': 'off',
    'jsdoc/require-param-type': 'off',
    'jsdoc/tag-lines': 'off',
    'no-console': 'error',
    'unicorn/catch-error-name': 'off',
    'unicorn/consistent-destructuring': 'off',
    'unicorn/consistent-function-scoping': ['error', { checkArrowFunctions: false }],
    'unicorn/custom-error-definition': 'error',
    'unicorn/filename-case': 'off',
    'unicorn/no-array-callback-reference': 'off',
    'unicorn/no-array-method-this-argument': 'off', // False positives
    'unicorn/no-null': 'off',
    'unicorn/prefer-node-protocol': 'off',
    'unicorn/prefer-ternary': ['error', 'only-single-line'],
    'unicorn/prevent-abbreviations': 'off',
  },
  overrides: [
    // node files
    {
      files: [
        './.eslintrc.js',
        './.prettierrc.js',
        './bin/**/*.js',
        './jest.config.js',
        './test/run-test.js',
        './transforms/ember-object/test.js',
      ],
      parserOptions: {
        sourceType: 'script',
      },
      env: {
        browser: false,
        node: true,
      },
      plugins: ['node'],
      extends: ['plugin:node/recommended'],
      rules: {
        'no-process-exit': 'off',
        // this can be removed once the following is fixed
        // https://github.com/mysticatea/eslint-plugin-node/issues/77
        'node/no-unpublished-require': 'off',
        'node/shebang': 'off',
        'unicorn/no-process-exit': 'off',
        'unicorn/prefer-module': 'off',
        'unicorn/prefer-top-level-await': 'off',
      },
    },
    // test files
    {
      files: ['**/*.test.{js,ts}'],
      env: {
        jest: true,
      },
    },
    // typescript files
    {
      files: ['*.ts'],
      parser: '@typescript-eslint/parser',
      parserOptions: {
        project: './tsconfig.lint.json',
        allowAutomaticSingleRunInference: true,
      },
      plugins: ['@typescript-eslint'],
      extends: [
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking',
        'plugin:@typescript-eslint/strict',
      ],
      rules: {
        '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
        '@typescript-eslint/ban-ts-comment': [
          'error',
          {
            'ts-expect-error': 'allow-with-description',
            'ts-ignore': true,
            'ts-nocheck': true,
          },
        ],
        '@typescript-eslint/consistent-type-assertions': 'error',
        '@typescript-eslint/consistent-type-definitions': 'error',
        '@typescript-eslint/consistent-type-imports': 'error',
        '@typescript-eslint/explicit-function-return-type': ['error', { allowExpressions: true }],
        '@typescript-eslint/explicit-member-accessibility': [
          'error',
          { accessibility: 'no-public' },
        ],
        '@typescript-eslint/method-signature-style': 'error',
        '@typescript-eslint/consistent-indexed-object-style': 'error',
        '@typescript-eslint/no-base-to-string': 'error',
        '@typescript-eslint/no-confusing-non-null-assertion': 'error',
        '@typescript-eslint/no-dynamic-delete': 'error',
        '@typescript-eslint/no-extra-semi': 'error',
        '@typescript-eslint/no-extraneous-class': 'error',
        '@typescript-eslint/no-explicit-any': 'error',
        '@typescript-eslint/no-implicit-any-catch': 'error',
        '@typescript-eslint/no-invalid-void-type': 'error',
        '@typescript-eslint/no-require-imports': 'error',
        '@typescript-eslint/no-unnecessary-condition': 'error',
        '@typescript-eslint/no-unnecessary-boolean-literal-compare': 'error',
        '@typescript-eslint/no-unnecessary-qualifier': 'error',
        '@typescript-eslint/no-unnecessary-type-arguments': 'error',
        '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
        '@typescript-eslint/prefer-enum-initializers': 'error',
        '@typescript-eslint/prefer-nullish-coalescing': 'error',
        '@typescript-eslint/prefer-for-of': 'error',
        '@typescript-eslint/prefer-includes': 'error',
        '@typescript-eslint/prefer-literal-enum-member': 'error',
        '@typescript-eslint/prefer-string-starts-ends-with': 'error',
        '@typescript-eslint/require-array-sort-compare': 'error',
        '@typescript-eslint/switch-exhaustiveness-check': 'error',
        '@typescript-eslint/unified-signatures': 'error',
      },
    },
  ],
};