.eslintrc

{
    "parser": "babel-eslint",
    "plugins": [
      "react"
    ],
    "extends": [
      "plugin:react/recommended"
    ],
    "env": {
      "browser": true,
      "jest": true
    },
    "rules": {
      "no-unused-expressions": "error",
      "no-trailing-spaces": "error",
      "no-nested-ternary": "error",
      "space-infix-ops": "error",
      "indent": ["warn", 2],
      "arrow-spacing": ["error", { "before": true, "after": true }],
      "space-in-parens": [ 0, "never" ],
      "template-curly-spacing": [ 2, "always" ],
      "array-bracket-spacing": [ 2, "always" ],
      "object-curly-spacing": [ 2, "always" ],
      "computed-property-spacing": [ 2, "never" ],
      "no-multiple-empty-lines": [ 2, { "max": 1, "maxEOF": 0, "maxBOF": 0 } ],
      "quotes": [ 1, "single", "avoid-escape" ],
      "no-use-before-define": [ 2, { "functions": false } ],
      "semi": [1, "always"],
      "prefer-const": 1,
      "react/prefer-es6-class": 0,
      "react/jsx-filename-extension": 0,
      "react/jsx-curly-spacing": [ 2, "always" ],
      "react/jsx-indent": [ 2, 2 ],
      "react/prop-types": [ 1 ],
      "react/no-array-index-key": [ 1 ],
      "class-methods-use-this": [ 1 ],
      "no-console": 0,
      "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"],
      "keyword-spacing": ["error", { "before": true, "after": true }],
      "newline-before-return": "error",
      "space-before-blocks": "error",
      "no-unused-vars": "error",
      "no-multi-spaces": "warn",
      "comma-spacing": ["error", { "before": false, "after": true }],
      "prefer-destructuring": ["error", {
        "VariableDeclarator": {
          "array": false,
          "object": false
        }
      }]
    }
  }