.eslintrc

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true
  },
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "module",
    "ecmaFeatures": {
      "classes": true,
      "experimentalObjectRestSpread": true,
      "jsx": true
    }
  },
  "rules": {
    "rest-spread-spacing": ["error", "never"],
    "semi": ["error", "always"],
    "quotes": ["error", "single"],
    "jsx-quotes": ["error", "prefer-double"],
    "prefer-spread": ["error"],
    "no-useless-call": ["error"],
    "no-trailing-spaces": ["error"],
    "space-before-blocks": ["error", "always"],
    "no-floating-decimal": ["error"],
    "comma-dangle": ["error", "never"],
    "generator-star-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "switch-colon-spacing": [
      "error",
      {
        "after": true,
        "before": false
      }
    ],
    "space-unary-ops": [
      "error",
      {
        "words": true,
        "nonwords": false
      }
    ],
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "always",
        "named": "always",
        "asyncArrow": "always"
      }
    ],
    "keyword-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "key-spacing": [
      "error",
      {
        "singleLine": {
          "beforeColon": false,
          "afterColon": true,
          "mode": "strict"
        },
        "multiLine": {
          "beforeColon": false,
          "afterColon": true,
          "mode": "strict"
        }
      }
    ]
  }
}