.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: 'tsconfig.json',
    sourceType: 'module',
  },
  plugins: [
    '@typescript-eslint/eslint-plugin',
    'prettier',
    'simple-import-sort',
  ],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:prettier/recommended',
  ],
  root: true,
  env: {
    node: true,
    jest: true,
  },
  rules: {
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-empty-function': 'off',
    '@typescript-eslint/no-inferrable-types': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'error',
    '@typescript-eslint/no-duplicate-imports': 'error',
    '@typescript-eslint/consistent-type-definitions': ['error', 'interface'],
    '@typescript-eslint/method-signature-style': ['error', 'method'],
    '@typescript-eslint/explicit-member-accessibility': [
      'error',
      { accessibility: 'no-public' },
    ],
    '@typescript-eslint/consistent-type-assertions': [
      'error',
      { assertionStyle: 'as', objectLiteralTypeAssertions: 'never' },
    ],
    '@typescript-eslint/no-unused-vars': [
      'error',
      { argsIgnorePattern: 'args' },
    ],
    '@typescript-eslint/naming-convention': [
      'error',
      { selector: 'default', format: ['strictCamelCase'] },
      { selector: 'typeLike', format: ['PascalCase'] },
      {
        selector: 'variable',
        format: [
          'strictCamelCase',
          'UPPER_CASE',
          'PascalCase', // decorator definition
        ],
      },
      {
        selector: 'parameter',
        modifiers: ['unused'],
        format: ['strictCamelCase'],
        leadingUnderscore: 'allow',
      },
      {
        selector: 'classProperty',
        format: [
          'strictCamelCase',
          'PascalCase', // component enum
        ],
      },
      { selector: 'enumMember', format: ['PascalCase'] },
    ],
    'eqeqeq': 'error',
    'no-promise-executor-return': 'error',
    'no-self-compare': 'error',
    'no-template-curly-in-string': 'error',
    'no-unreachable-loop': 'error',
    'arrow-body-style': 'error',
    'consistent-return': 'error',
    'curly': ['error', 'multi', 'consistent'],
    'default-case-last': 'error',
    'grouped-accessor-pairs': 'error',
    'no-alert': 'error',
    'no-bitwise': 'error',
    'no-console': 'error',
    'no-else-return': 'error',
    'no-empty': ['error', { allowEmptyCatch: true }],
    'no-eval': 'error',
    'no-extend-native': 'error',
    'no-extra-label': 'error',
    'no-implied-eval': 'error',
    'no-label-var': 'error',
    'no-negated-condition': 'error',
    'no-new-wrappers': 'error',
    'no-return-assign': 'error',
    'no-return-await': 'error',
    'no-sequences': 'error',
    'no-throw-literal': 'error',
    'prefer-promise-reject-errors': 'error',
    'no-unneeded-ternary': 'error',
    '@typescript-eslint/no-unused-expressions': 'error',
    'no-useless-call': 'error',
    'no-useless-escape': 'error',
    'no-useless-rename': 'error',
    'no-useless-return': 'error',
    'no-void': 'error',
    'object-shorthand': 'error',
    'one-var': ['error', 'never'],
    'operator-assignment': 'error',
    'prefer-arrow-callback': 'error',
    'prefer-exponentiation-operator': 'error',
    'prefer-numeric-literals': 'error',
    'prefer-object-spread': 'error',
    'prefer-regex-literals': 'error',
    'prefer-spread': 'error',
    'require-unicode-regexp': 'error',
    'max-params': ['warn', 3],
    'max-depth': ['warn', 4],
    'max-lines': ['warn', 300],
    'max-lines-per-function': ['warn', 50],
    'complexity': ['warn', 8],
    'simple-import-sort/imports': 'warn',
    'simple-import-sort/exports': 'warn',
  },
  overrides: [
    {
      files: ['**/*.{spec,test}.ts'],
      rules: {
        'max-lines': 'off',
        'max-lines-per-function': 'off',
      },
    },
    {
      files: ['**/*.{service,component,directive,resolver}.ts'], // constructor based dependency injection
      rules: {
        'max-params': 'off',
      },
    },
  ],
};