.eslintrc.js

module.exports = {
  root: true,
  env: {
    commonjs: true,
    es6: true
  },
  globals: {},
  // see https://standardjs.com/
  // see https://github.com/standard/eslint-config-standard
  extends: [
    'eslint:recommended',
    'standard'
  ],
  parser: '@typescript-eslint/parser',
  plugins: [
    '@typescript-eslint'
  ],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module'
  },
  rules: {

    // basics

    'no-global-assign': 2,

    'no-undef': 0,

    'no-void': 0,

    'no-eval': 0,

    'no-lone-blocks': 0,

    // our basic style rules
    semi: [
      'error',
      'always'
    ],
    indent: [
      'error',
      2
    ],
    quotes: [
      'error',
      'single'
    ],
    'linebreak-style': [
      'error',
      'unix'
    ],

    // spacing
    'space-infix-ops': 2,
    'space-unary-ops': [2, { words: true, nonwords: false }],
    'space-in-parens': ['error', 'never'],
    'keyword-spacing': [2, { before: true, after: true }],

    // enforce litteral objects on multiple lines
    'block-spacing': 'error',
    curly: 2,
    'object-curly-spacing': ['error', 'always'],
    'brace-style': ['error', '1tbs', { allowSingleLine: false }],

    // limit code block and line length
    /*
    "max-len": 1,
    "max-statements": 1,
    "max-depth": 1,
    "max-nested-callbacks": 1,
    "max-params": 1,
    "max-statements": 1,
    "max-statements-per-line": 1
    */

    // loosening of code-quality rules we may want to fix later
    // (warnings for now)

    // forbid "one var" style, enforce one declaration per variable
    'one-var': [
      1,
      'never'
    ],

    'import/first': 1,
    'no-var': 1,
    'no-empty': 1,
    'no-mixed-operators': 1,
    'no-unused-vars': 1,
    'no-fallthrough': 1,
    'no-case-declarations': 1,
    'no-irregular-whitespace': 1,
    'no-self-assign': 1,
    'new-cap': 1,
    'no-undefined': 1,

    'import/export': 0,

    camelcase: 1,

    'no-use-before-define': 0,
    'no-console': 1,

    'prefer-const': 1,

    'no-useless-constructor': 1,
    'no-unused-expressions': 1,
    'no-template-curly-in-string': 1,
    'prefer-promise-reject-errors': 1
  }
};