example.eslintrc.js

const error = "error"
const never = "never"
const always = "always"
const off = "off"
const warn = "warn"

module.exports = {
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaFeatures": {
      "legacyDecorators": true,
      "experimentalObjectRestSpread": true
    }
  },
  "extends": ["standard", "standard-react"],
  "plugins": [
    "babel",
    "import",
    "jsx-a11y",
    "react"
  ],
  "globals": {
    "React"         : true,
    "__DEV__"       : true,
    "WebSocket"     : true,
    "XMLHttpRequest": true,
    "jest"          : true,
    "describe"      : true,
    "beforeAll"     : true,
    "afterAll"      : true,
    "beforeEach"    : true,
    "afterEach"     : true,
    "test"          : true,
    "expect"        : true
  },
  "rules": {
    "babel/new-cap"              : 1,
    "babel/no-unused-expressions": 1,
    "babel/no-invalid-this"      : 0,
    "babel/quotes"               : [error, "single", {"avoidEscape": true}],
    "babel/object-curly-spacing" : [error, never],
    "babel/semi"                 : [error, never],
    "import/extensions"          : off,
    "react/prop-types"           : off,
    "react/jsx-handler-names"    : off,

    "key-spacing"                : [warn, {
      "singleLine": {
        "beforeColon": false,
        "afterColon" : false
      },
      "align"     : {
        "beforeColon": false,
        "afterColon" : true,
        "on"         : "colon"
      }
    }],
    "space-before-function-paren": [error, always],
    "block-spacing"              : [error, never],
    "curly"                      : off,
    "spaced-comment"             : off,
    "space-in-parens"            : off,
    "indent"                     : off,
    "no-multi-spaces"            : off,
    "no-multiple-empty-lines"    : off,
    "padded-blocks"              : off,

    "new-cap"              : off,
    "no-unused-expressions": off,
    "no-invalid-this"      : off,
    "quotes"               : off,
    "object-curly-spacing" : off,
    "semi"                 : off,
    "max-len": [
      error,
      120,
      4,
      {
        "ignoreComments": true,
        "ignoreUrls": false,
        "ignoreRegExpLiterals": false,
        "ignoreStrings": false,
        "ignoreTemplateLiterals": false
      }
    ],
    "lines-between-class-members": ["error", "always", { exceptAfterSingleLine: true }]
  }
}