.eslintrc

{
  "env": {
    "browser": true,
    "es6": true
  },
  "globals": {
    "module": "readonly",
    "jest": "readonly",
    "describe": "readonly",
    "it": "readonly",
    "expect": "readonly",
    "beforeEach": "readonly",
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "plugins": ["babel"],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "root": true,
  "rules": {
    "no-var": "error",
    "prefer-const": "error",
    "one-var": ["error", "never"],
    "prefer-arrow-callback": "error",
    "key-spacing": [
      "error",
      {
        "beforeColon": false
      }
    ],
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": ["const", "let", "block-like"],
        "next": "*"
      },
      {
        "blankLine": "any",
        "prev": ["const", "let", "block-like"],
        "next": ["const", "let", "block-like"]
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": ["return"]
      }
    ],
    "semi": "off",
    "babel/semi": "error",
    "object-curly-newline": [
      "error",
      {
        "multiline": true,
        "minProperties": 2
      }
    ],
    "object-property-newline": [
      "error",
      {
        "allowMultiplePropertiesPerLine": false
      }
    ],
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 1,
        "maxEOF": 0,
        "maxBOF": 0
      }
    ],
    "no-void": "off",
    "arrow-parens": ["error", "as-needed"],
    "quote-props": ["error", "as-needed"],
    "prefer-template": "error",
    "no-else-return": "error",
    "newline-per-chained-call": "error",
    "linebreak-style": ["error", "unix"],
    "arrow-body-style": "off",
    "class-methods-use-this": "off",
    "comma-dangle": [
      "error",
      {
        "arrays": "only-multiline",
        "objects": "only-multiline",
        "imports": "only-multiline",
        "exports": "only-multiline",
        "functions": "only-multiline"
      }
    ],
    "function-paren-newline": ["error", "consistent"],
    "lines-between-class-members": ["error", "always", { "exceptAfterSingleLine": true }],
    "max-len": "off",
    "no-console": "warn",
    "no-multi-spaces": [
      "error",
      {
        "ignoreEOLComments": true
      }
    ],
    "no-nested-ternary": "off",
    "no-param-reassign": [
      "error",
      {
        "props": false
      }
    ],
    "no-plusplus": "off",
    "no-restricted-syntax": ["error", "LabeledStatement", "WithStatement"],
    "no-underscore-dangle": "off",
    "no-unused-vars": ["error"],
    "operator-linebreak": ["off"],
    "prefer-destructuring": "off"
  }
}