.eslintrc

{
  "env": {
    "browser": true,
    "node": true
  },
  "plugins": ["react"],
  "settings": {
    "react": {
      "version": "detect"
    }
  },
  "parser": "babel-eslint",
  "parserOptions": {
    "sourceType": "module",
    "allowImportExportEverywhere": false,
    "ecmaFeatures": {
      "globalReturn": false
    },
    "babelOptions": {
      "configFile": "path/to/config.js"
    }
  },
  "rules": {
    "no-console": "off",
    "space-in-parens": [0, "always"],
    "template-curly-spacing": [2, "always"],
    "array-bracket-spacing": [2, "always"],
    "object-curly-spacing": [2, "always"],
    "computed-property-spacing": [2, "always"],
    "no-multiple-empty-lines": [
      2,
      {
        "max": 1,
        "maxEOF": 0,
        "maxBOF": 0
      }
    ],
    "quotes": [1, "double", "avoid-escape"],
    "no-use-before-define": [
      2,
      {
        "functions": false
      }
    ],
    "semi": [0, "never"],
    "prefer-const": 1,
    "react/prefer-es6-class": 0,
    "react/jsx-filename-extension": 0,
    "react/jsx-curly-spacing": ["error", "never", { "allowMultiline": true }],
    "react/jsx-indent": [2, 4],
    "react/prop-types": [1],
    "react/no-array-index-key": [1],
    "class-methods-use-this": [1],
    "no-undef": [1],
    "no-case-declarations": [1],
    "no-return-assign": [1],
    "no-param-reassign": [1],
    "no-shadow": [1],
    "camelcase": [1],
    "no-underscore-dangle": [0, "always"]
  }
}