.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  plugins: [
    'eslint-plugin',
    '@typescript-eslint',
    'eslint-comments',
    'import',
    'eslint-comments'
  ],

  env: {
    es6: true,
    node: true,
  },
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
  ],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
    project: [
      './tsconfig.jest.json',
      './tsconfig.eslint.json',
      './tsconfig.build.json',
    ],
    tsconfigRootDir: __dirname,
    warnOnUnsupportedTypeScriptVersion: false,
  },
  rules: {
    '@typescript-eslint/consistent-type-definitions': ['error', 'interface'],
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/no-empty-function': [
      'error',
      {allow: ['arrowFunctions']},
    ],
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-non-null-assertion': 'off',
    '@typescript-eslint/no-var-requires': 'off',
    '@typescript-eslint/prefer-nullish-coalescing': 'error',
    '@typescript-eslint/prefer-optional-chain': 'error',
    '@typescript-eslint/unbound-method': 'off',
    '@typescript-eslint/no-use-before-define':'off',
    // TODO - enable these new recommended rules
    '@typescript-eslint/no-floating-promises': 'off',
    '@typescript-eslint/no-unsafe-assignment': 'off',
    '@typescript-eslint/no-unsafe-call': 'off',
    '@typescript-eslint/no-unsafe-member-access': 'off',
    '@typescript-eslint/no-unsafe-return': 'off',
    '@typescript-eslint/restrict-plus-operands': 'off',
    '@typescript-eslint/restrict-template-expressions': 'off',
    // TODO - enable this
    '@typescript-eslint/naming-convention': 'off',


    curly: ['error', 'all'],
    'no-mixed-operators': 'error',
    'no-console': 0,
    'no-process-exit': 'error',

    //
    // eslint-plugin-eslint-comment
    //

    // require a eslint-enable comment for every eslint-disable comment
    'eslint-comments/disable-enable-pair': [
      'error',
      {
        allowWholeFile: true,
      },
    ],
    // disallow a eslint-enable comment for multiple eslint-disable comments
    'eslint-comments/no-aggregating-enable': 'error',
    // disallow duplicate eslint-disable comments
    'eslint-comments/no-duplicate-disable': 'error',

    // disallow eslint-disable comments without rule names
    'eslint-comments/no-unlimited-disable': 'error',
    // disallow unused eslint-disable comments
    'eslint-comments/no-unused-disable': 'error',
    // disallow unused eslint-enable comments
    'eslint-comments/no-unused-enable': 'error',
    // disallow ESLint directive-comments
    'eslint-comments/no-use': [
      'error',
      {
        allow: [
          'eslint-disable',
          'eslint-disable-line',
          'eslint-disable-next-line',
          'eslint-enable',
        ],
      },
    ],

    //
    // eslint-plugin-import
    //

    // disallow non-import statements appearing before import statements
    'import/first': 'error',
    // Require a newline after the last import/require in a group
    'import/newline-after-import': 'error',
    // Forbid import of modules using absolute paths
    'import/no-absolute-path': 'error',
    // disallow AMD require/define
    'import/no-amd': 'off',
    // forbid default exports
    'import/no-default-export': 'off',
    // Forbid the use of extraneous packages
    'import/no-extraneous-dependencies': [
      'error',
      {
        devDependencies: true,
        peerDependencies: true,
        optionalDependencies: false,
      },
    ],
    // Forbid mutable exports
    'import/no-mutable-exports': 'off',
    // Prevent importing the default as if it were named
    'import/no-named-default': 'off',
    // Prohibit named exports
    'import/no-named-export': 'off', // we want everything to be a named export
    // Forbid a module from importing itself
    'import/no-self-import': 'off',
  },

};