.eslintrc.json

{
  "env": {
    "browser": true,
    "es6": true,
    "node": true,
    "mocha": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 2017,
    "sourceType": "module"
  },
  "rules": {
    "arrow-parens": ["error", "as-needed"],
    "camelcase": "error",
    "comma-dangle": ["error", { "objects": "never" }],
    "indent": ["error", 2],
    "linebreak-style": ["error", "unix"],
    "no-console": "off",
    "no-multiple-empty-lines": "error",
    "no-unused-vars": ["error", { "args": "none" }],
    "no-var": "error",
    "object-curly-spacing": ["error", "always", { "objectsInObjects": false }],
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "quotes": ["error", "double"],
    "semi": ["error", "always"],
    "space-before-function-paren": ["error", {
      "anonymous": "ignore",
      "named": "ignore",
      "asyncArrow": "ignore"
    }]
  }
}