.eslintrc.json

{
  "env": {
    "es6": true,
    "browser": true,
    "mocha": true,
    "node": true
  },
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "experimentalObjectRestSpread": true
    }
  },
  "globals": {
    "React": true
  },
  "settings": {
    "react": {
      "version": "15.0"
    }
  },
  "plugins": [
    "babel",
    "react"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "rules": {
    "array-bracket-spacing": ["error", "never"],
    "arrow-parens": "error",
    "arrow-spacing": "error",
    "brace-style": "error",
    "comma-dangle": ["error", "always-multiline"],
    "comma-spacing": ["error", {"before": false, "after": true}],
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never"],
    "consistent-return": "off",
    "consistent-this": ["error", "self"],
    "dot-location": ["error", "property"],
    "dot-notation": "error",
    "eol-last": "error",
    "eqeqeq": ["error", "smart"],
    "generator-star-spacing": "error",
    "id-blacklist": ["error", "e"],
    "indent": ["error", 4, {"SwitchCase": 1}],
    "jsx-quotes": ["error", "prefer-double"],
    "key-spacing": "error",
    "keyword-spacing": "error",
    "max-len": ["error", 120, 4, {"ignoreComments": true}],
    "new-cap": ["off", {"capIsNew": true, "newIsCap": true}],
    "no-await-in-loop": "error",
    "no-case-declarations": "off",
    "no-cond-assign": "error",
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty-pattern": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-semi": "error",
    "no-multi-spaces": "error",
    "no-multiple-empty-lines": "error",
    "no-shadow": "off",
    "no-spaced-func": "error",
    "no-trailing-spaces": "error",
    "no-undef": "error",
    "no-underscore-dangle": "error",
    "no-unneeded-ternary": "error",
    "no-unreachable": "error",
    "no-unused-expressions": "error",
    "no-unused-vars": "error",
    "no-var": "error",
    "object-curly-spacing": ["error", "never"],
    "one-var": ["error", "never"],
    "operator-linebreak": ["error", "after"],
    "padded-blocks": ["error", "never"],
    "prefer-arrow-callback": "off",
    "prefer-const": "error",
    "quotes": ["error", "single", "avoid-escape"],
    "semi": ["error", "always"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", "never"],
    "space-infix-ops": "error",
    "space-unary-ops": ["error", {"words": true, "nonwords": false}],
    "spaced-comment": "error",
    "strict": "off",
    "yoda": "error",
    "babel/new-cap": "off",
    "babel/object-shorthand": "off"
  }
}