.eslintrc.json

{
  "root": true,
  "env": {
    "browser": true,
    "jest": true, 
    "node": true,
    "es6": true
  },

  "extends": ["plugin:prettier/recommended"],

  "parser": "babel-eslint",

  "parserOptions": {
    "ecmaVersion": 2016,
    "sourceType": "module",
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true,
      "legacyDecorators": true
    }
  },

  "plugins": [],

  "rules": {
    "eqeqeq": ["error", "always"],
    "curly": 0,
    "quotes": 0,
    "no-undef": "error",
    "id-length": ["error", { "min": 1, "max": 40 }],
    "valid-typeof": "error",
    "no-unreachable": "error",
    "no-unused-vars": "error",
    "no-const-assign": "error",
    "constructor-super": "error",
    "no-this-before-super": "error",
    "class-methods-use-this": 0,
    "import/no-namespace": 0,
    "require-atomic-updates": 0,
    "semi": 0,
    "no-shadow": 0,
    "no-extra-semi": 0,
    "comma-dangle": 0
  }
}