.eslintrc

{
  "env": {
    "browser": true,
    "es6": true
  },
  "plugins": [
    "react", //on react based application
    "import",
  ],
  "ecmaFeatures": {
    "arrowFunctions": true,
    "blockBindings": true,
    "classes": true,
    "defaultParams": true,
    "destructuring": true,
    "forOf": true,
    "jsx": true,
    "modules": true,
    "objectLiteralComputedProperties": true,
    "objectLiteralDuplicateProperties": true,
    "objectLiteralShorthandMethods": true,
    "objectLiteralShorthandProperties": true,
    "spread": true,
    "superInFunctions": true,
    "templateStrings": true
  },
  "parser": "babel-eslint",
  "rules": {
    /*** best practices ***/

    "eqeqeq": [1, "smart"],
    "curly": [2, "multi-line"],
    "no-unused-vars": 1,
    // enforces return statements in callbacks of array's methods
    "array-callback-return": 2,
    // require default case in switch statements
    "default-case": 2,
    // make sure for-in loops have an if statement
    "guard-for-in": 2,
    // disallow the use of alert, confirm, and prompt
    "no-alert": 1,
    // disallow use of arguments.caller or arguments.callee
    "no-caller": 2,
    // disallow lexical declarations in case/default clauses
    // http://eslint.org/docs/rules/no-case-declarations.html
    "no-case-declarations": 2,
    // disallow else after a return in an if
    "no-else-return": 2,
    // disallow Unnecessary Labels
    // http://eslint.org/docs/rules/no-extra-label
    "no-extra-label": 2,
    // disallow use of eval()
    "no-eval": 1,
    // disallow adding to native types
    "no-extend-native": 1,
    // disallow unnecessary function binding
    "no-extra-bind": 1,
    // disallow fallthrough of case statements
    "no-fallthrough": 1,
    // disallow the use of leading or trailing decimal points in numeric literals
    "no-floating-decimal": 1,
    // disallow usage of __iterator__ property
    "no-iterator": 2,
    // disallow use of labels for anything other then loops and switches
    "no-labels": [
      2,
      {
        "allowLoop": false,
        "allowSwitch": false
      }
    ],
    // disallow unnecessary nested blocks
    "no-lone-blocks": 2,
    // disallow creation of functions within loops
    "no-loop-func": 2,
    // disallow use of multiline strings
    "no-multi-str": 2,
    // disallow reassignments of native objects
    "no-native-reassign": 2,
    // disallow use of new operator for Function object
    "no-new-func": 1,
    // disallows creating new instances of String, Number, and Boolean
    "no-new-wrappers": 2,
    // disallow use of (old style) octal literals
    "no-octal": 2,
    // disallow use of octal escape sequences in string literals, such as
    // var foo = 'Copyright \251';
    "no-octal-escape": 2,
    // disallow usage of __proto__ property
    "no-proto": 2,
    // disallow declaring the same variable more then once
    "no-redeclare": 2,
    // disallow use of assignment in return statement
    "no-return-assign": 2,
    // disallow use of `javascript: urls.
    "no-script-url": 2,
    // disallow comparisons where both sides are exactly the same
    "no-self-compare": 2,
    // disallow use of comma operator
    "no-sequences": 1,
    // restrict what can be thrown as an exception
    "no-throw-literal": 2,
    // disallow usage of expressions in statement position
    "no-unused-expressions": 2,
    // disallow unused labels
    // http://eslint.org/docs/rules/no-unused-labels
    "no-unused-labels": 2,
    // disallow unnecessary string escaping
    // http://eslint.org/docs/rules/no-useless-escape
    "no-useless-escape": 2,
    // disallow use of the with statement
    "no-with": 1,
    // require use of the second argument for parseInt()
    "radix": 2,

    /*** best practice rule end ***/

    /***********************************************************/

    /*** breaking error rules ***/
    // disallow assignment in conditional expressions
    "no-cond-assign": [2, "always"],
    // disallow use of constant expressions in conditions
    "no-constant-condition": 1,
    // disallow control characters in regular expressions
    "no-control-regex": 2,
    // disallow use of debugger
    //'no-debugger': 2, //for production
    // disallow duplicate arguments in functions
    "no-dupe-args": 2,
    // disallow duplicate keys when creating object literals
    "no-dupe-keys": 2,
    // disallow a duplicate case label.
    "no-duplicate-case": 2,
    // disallow the use of empty character classes in regular expressions
    "no-empty-character-class": 2,
    // disallow empty statements
    "no-empty": 2,
    // disallow assigning to the exception in a catch block
    "no-ex-assign": 2,
    // disallow unnecessary parentheses
    "no-extra-parens": [1, "functions"],
    // disallow unnecessary semicolons
    "no-extra-semi": 1,
    // disallow overwriting functions written as function declarations
    "no-func-assign": 2,

    // disallow function or variable declarations in nested blocks
    "no-inner-declarations": [2, "functions"],
    // disallow invalid regular expression strings in the RegExp constructor
    "no-invalid-regexp": 2,
    // disallow negation of the left operand of an in expression
    "no-negated-in-lhs": 2,
    // disallow the use of object properties of the global object (Math and JSON) as functions
    "no-obj-calls": 2,
    // disallow sparse arrays
    "no-sparse-arrays": 2,
    // disallow unreachable statements after a return, throw, continue, or break statement
    "no-unreachable": 2,
    // disallow comparisons with the value NaN
    "use-isnan": 2,
    // ensure that the results of typeof are compared against a valid string
    "valid-typeof": 2,
    /*** breaking error rules end***/

    /***********************************************************/

    /*** es6 error rules start ***/
    "no-var": 1,
    "prefer-const": 1,
    // disallow arrow functions where they could be confused with comparisons
    // http://eslint.org/docs/rules/no-confusing-arrow
    "no-confusing-arrow": [
      2,
      {
        "allowParens": true
      }
    ],
    // disallow modifying variables that are declared using const
    "no-const-assign": 2,
    // disallow duplicate class members
    // http://eslint.org/docs/rules/no-dupe-class-members
    "no-dupe-class-members": 2,
    // disallow symbol constructor
    // http://eslint.org/docs/rules/no-new-symbol
    "no-new-symbol": 2,
    // disallow to use this/super before super() calling in constructors.
    "no-this-before-super": 2,
    // disallow unnecessary constructor
    // http://eslint.org/docs/rules/no-useless-constructor
    "no-useless-constructor": 2,
    // suggest using arrow functions as callbacks
    "prefer-arrow-callback": 1,

    // disallow invalid exports, e.g. multiple defaults
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/export.md
    "import/export": 2,
    // ensure imports point to files/modules that can be resolved
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-unresolved.md
    "import/no-unresolved": [2, { "commonjs": true }],
    /*** es6 error rules end ***/

    /***********************************************************/

    /*** react error rules start ***/

    // Prevent use of `accessKey`
    // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/no-access-key.md
    //'jsx-a11y/no-access-key': 2,

    // Require <img> to have a non-empty `alt` prop, or role="presentation"
    // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/img-uses-alt.md
    //* 'jsx-a11y/img-uses-alt': 2,

    // Prevent img alt text from containing redundant words like "image", "picture", or "photo"
    // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/redundant-alt.md
    //* 'jsx-a11y/redundant-alt': 2,

    // Require ARIA roles to be valid and non-abstract
    // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/valid-aria-role.md
    //* 'jsx-a11y/valid-aria-role': 2,

    // Prevent missing displayName in a React component definition
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/display-name.md
    //* 'react/display-name': [0, { 'ignoreTranspilerName': false }],

    // Validate JSX has key prop when in array or iterator
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-key.md
    "react/jsx-key": 1,

    // Prevent usage of .bind() and arrow functions in JSX props
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-bind.md
    "react/jsx-no-bind": [
      1,
      {
        "ignoreRefs": true,
        "allowArrowFunctions": true,
        "allowBind": false
      }
    ],

    // Prevent duplicate props in JSX
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-duplicate-props.md
    "react/jsx-no-duplicate-props": 2,

    // Disallow undeclared variables in JSX
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-undef.md
    "react/jsx-no-undef": 2,

    // Enforce PascalCase for user-defined JSX components
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-pascal-case.md
    "react/jsx-pascal-case": 2,

    // Prevent React to be incorrectly marked as unused
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-react.md
    "react/jsx-uses-react": 2,

    // Prevent variables used in JSX to be incorrectly marked as unused
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-vars.md
    "react/jsx-uses-vars": 2,

    // Prevent usage of dangerous JSX properties
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-danger.md
    "react/no-danger": 1,

    // Prevent usage of deprecated methods
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-deprecated.md
    "react/no-deprecated": 1,

    // Prevent usage of setState in componentDidMount
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-did-mount-set-state.md
    "react/no-did-mount-set-state": 2,

    // Prevent usage of setState in componentDidUpdate
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-did-update-set-state.md
    "react/no-did-update-set-state": 2,

    // Prevent usage of isMounted
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-is-mounted.md
    "react/no-is-mounted": 2,

    // Prevent multiple component definition per file
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-multi-comp.md
    //* 'react/no-multi-comp': [1, { 'ignoreStateless': true }],

    // Prevent usage of unknown DOM property
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unknown-property.md
    "react/no-unknown-property": 2,

    // Require stateless functions when not using lifecycle methods, setState or ref
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prefer-stateless-function.md
    //* 'react/prefer-stateless-function': 2,

    // Prevent missing props validation in a React component definition
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prop-types.md
    //* 'react/prop-types': [2, { 'ignore': [], 'customValidators': [] }],

    // Prevent missing React when using JSX
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/react-in-jsx-scope.md
    "react/react-in-jsx-scope": 2,

    // Require render() methods to return something
    // https://github.com/yannickcr/eslint-plugin-react/pull/502
    "react/require-render-return": 2

    // Prevent extra closing tags for components without children
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/self-closing-comp.md
    //* 'react/self-closing-comp': 1,

    // Enforce component methods order
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/sort-comp.md
    /** 'react/sort-comp': [2, {
      'order': [
        'static-methods',
        'lifecycle',
        '/^on.+$/',
        '/^(get|set)(?!(InitialState$|DefaultProps$|ChildContext$)).+$/',
        'everything-else',
        '/^render.+$/',
        'render'
      ]
    }], */
    // Prevent missing parentheses around multilines JSX
    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/wrap-multilines.md
    /** 'react/wrap-multilines': [2, {
      declaration: true,
      assignment: true,
      return: true
    }], */
    /*** react error rules end ***/
  }
}