.eslintrc

{
  "env": {
    "es6": true,
    "jest": true,
    "browser": true,
    "node": true,
  },
  "parser": "babel-eslint",
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "experimentalObjectRestSpread": true
    }
  },
  "plugins": [
    "import",
    "react"
  ],
  "globals": {
    "SyntheticMouseEvent": true,
    "SyntheticTouchEvent": true
  },
  "rules": {
    // Possible Errors
    "no-extra-parens": ["error", "all", {
      "ignoreJSX": "all"
    }],
    "valid-jsdoc": ["error", {
      "requireReturn": false,
      "matchDescription": ".+"
    }],

    // Best Practices
    "complexity": ["error", {
      "max": 10
    }],
    "consistent-return": "error",
    "curly": "error",
    "dot-location": ["error", "property"],
    "eqeqeq": ["error", "smart"],
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-global-assign": "error",
    "no-implied-eval": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-new":"error",
    "no-param-reassign": "error",
    "no-return-assign": "error",
    "no-script-url": "error",
    "no-self-compare": "error",
    "no-sequences":"error",
    "no-throw-literal":"error",
    "no-unmodified-loop-condition":"error",
    "no-unused-expressions":"error",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-useless-return": "error",
    "no-with":"error",
    "prefer-promise-reject-errors": "error",
    "require-await": "error",

    // Variables
    "no-shadow-restricted-names": "error",
    "no-shadow":  ["error", {
      "hoist": "functions"
    }],
    "no-undef-init":"error",
    "no-undefined": "error",

    //Stylistic Issues
    "array-bracket-spacing": ["error", "never"],
    "brace-style": ["error", "stroustrup", {
      "allowSingleLine": true
    }],
    "block-spacing": "error",
    "comma-dangle": ["error", "always-multiline"],
    "comma-spacing": "error",
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never"],
    "eol-last": ["error", "always"],
    "func-call-spacing": ["error", "never"],
    "indent": ["error", 2],
    "jsx-quotes": ["error", "prefer-double"],
    "key-spacing": "error",
    "keyword-spacing": "error",
    "max-depth": "error",
    "max-nested-callbacks": ["error", 5],
    "max-params": ["error", 5],
    "max-statements-per-line": "error",
    "no-bitwise": ["error"],
    "no-multiple-empty-lines": ["error", { "max": 1 } ],
    "no-nested-ternary": "error",
    "no-unneeded-ternary": "error",
    "no-whitespace-before-property": "error",
    "object-curly-spacing": ["error", "always"],
    "one-var": ["error", "never" ],
    "operator-assignment": ["error", "always"],
    "quote-props": ["error", "as-needed"],
    "quotes": ["error", "double" ],
    "semi": ["error", "never" ],
    "space-before-blocks": "error",
    "space-before-function-paren": ["error", "never" ],
    "space-in-parens": ["error", "never" ],
    "space-infix-ops": "error",
    "spaced-comment": ["error", "always" ],
    "space-unary-ops": ["error", {
      "words": true,
      "nonwords": false
    }],
    "template-tag-spacing": "error",

    // ES6
    "arrow-body-style": ["error", "as-needed"],
    "arrow-parens": ["error", "as-needed"],
    "arrow-spacing": ["error", {
      "before": true,
      "after": true
    }],
    "no-duplicate-imports": "error",
    "no-useless-computed-key": "error",
    "no-useless-constructor":"error",
    "no-useless-rename": "error",
    "no-var": "error",
    "object-shorthand":["error", "always", {
      "avoidQuotes": true
    }],
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
     "prefer-destructuring": ["error", {
      "array": true,
      "object": true
    }],
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error",
    "rest-spread-spacing": ["error", "never"],
    "template-curly-spacing": "error",
    "yield-star-spacing": ["error", "before"],
    // Import
    "import/no-unresolved": ["error", {
      "commonjs": true
    }]
  }
}