.eslintrc.json

{
  "extends": ["plugin:jest/recommended","airbnb"],
  "env": {
    "browser": true,
    "node": true,
    "jest": true
  },
  "parser": "babel-eslint",
  "parserOptions": {
    "sourceType": "module",
    "allowImportExportEverywhere": true
  },
  "plugins": ["jest"],
  "rules": {
    "arrow-body-style": [
      "error",
      "as-needed"
    ],
    "arrow-parens": [ "warn", "always" ],
    "comma-dangle": [ "error", {
      "arrays": "always-multiline",
      "objects": "always-multiline",
      "imports": "always-multiline",
      "exports": "always-multiline",
      "functions": "never"
      }
    ],
    "consistent-return": "off",
    "eol-last": ["error", "always"],
    "func-names": ["warn", "as-needed"],
    "id-length": "off",
    "import/prefer-default-export": "off",
    "jest/no-disabled-tests": "warn",
    "jest/no-focused-tests": "error",
    "max-len": [ "error", 
      { 
        "code": 80,
        "ignoreComments": true,
        "ignoreStrings": true,
        "ignoreUrls": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ],
    "no-bitwise": ["error", { "allow": ["~"] }],
    "no-plusplus": [ "warn", { "allowForLoopAfterthoughts": true }],
    "no-multiple-empty-lines": [
      "error",
      {
        "max":1,
        "maxEOF":1,
        "maxBOF":0
      }
    ],
    "prefer-destructuring": [ "error", 
      {
        "VariableDeclarator": {
         "array": false,
         "object": true
        },
        "AssignmentExpression": {
          "array": false,
          "object": true
        }
      },
      {
        "enforceForRenamedProperties": false
      }
    ],
    "radix": "off",
    "no-underscore-dangle": "off",
    "max-params": [ "warn", { "max": 3 } ],
    "react/forbid-prop-types": [
      "error", 
      {
        "forbid": ["any","array"]
      }
    ],
    "react/jsx-filename-extension": 0,
    "react/no-array-index-key": 0,
    "react/prefer-stateless-function": 0
  },
  "overrides": {
    "files": [
      "src/client/config/*",
      "src/server/config/*",
      "*.test.js"
    ],
    "rules": {
      "import/no-extraneous-dependencies": [
        "error",
        {
          "devDependencies": true
        }
      ]
    }
  }
}