.eslintrc.js

module.exports = {
  "extends": [
    "eslint-config-airbnb-base",
    "eslint-config-airbnb-base/rules/strict"
  ],
  "parserOptions": {
    "ecmaVersion": 2018,
    "ecmaFeatures": {
      "impliedStrict": true
    }
  },
  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },
  "globals": {
    "beforeEach": true,
    "afterEach": true,
    "describe": true,
    "expect": true,
    "it": true,
    "xdescribe": true,
    "xit": true
  },
  "rules": {
    "camelcase": "error",
    "comma-dangle": 0,
    "class-methods-use-this": 0,
    "no-use-before-define": ["error", { "functions": false }],
    "indent": ["warn", 2, { "VariableDeclarator": {"var": 2, "let": 2, "const": 3}, "SwitchCase": 1 }],
    "keyword-spacing": "warn",
    "new-cap": ["warn", {"properties": false}],
    "no-control-regex": 0,
    "no-unused-vars": "warn",
    "no-console": "off",
    "no-param-reassign": "off",
    "one-var": ["warn", "always"],
    "padded-blocks": ["warn", {"classes":"always"}],
    "semi": ["error", "never"],
    "space-before-function-paren": ["error", "never"]
  }
}