A eslint config file for linting react/jsx and ES6 syntax. This file is based on (https://gist.github.com/cletusw/e01a85e399ab563b1236) and (https://github.com/kriasoft/react-starter-kit/blob/master/.eslintrc). Note that I use single quote in the rules, to change it, lookup 'quotes' and change it to `"quotes": [1, "double"].

.eslintrc

{
    "parser": "babel-eslint",
    "env": {
      "browser": true,
      "node": true,
      "es6": true
    },
    "ecmaFeatures": {
        "jsx": true,
        "modules": true,
        "classes": true
    },
    "plugins":[
        "react"
    ],
    "globals": {
        "module": 0
    },
    "rules": {
        // React
        "react/display-name": 0,
        "react/jsx-boolean-value": 1,
        "react/jsx-closing-bracket-location": 1,
        "react/jsx-curly-spacing": 1,
        "react/jsx-max-props-per-line": 0,
        "react/jsx-indent-props": 0,
        "react/jsx-no-duplicate-props": 1,
        "react/jsx-no-undef": 1,
        "react/jsx-quotes": 1,
        "react/jsx-sort-prop-types": 0,
        "react/jsx-sort-props": 0,
        "react/jsx-uses-react": 1,
        "react/jsx-uses-vars": 1,       //Prevent variables used in JSX to be incorrectly marked as unused
        "react/no-danger": 0,
        "react/no-set-state": 1,
        "react/no-did-mount-set-state": 1,
        "react/no-did-update-set-state": 1,
        "react/no-multi-comp": 1,
        "react/no-unknown-property": 1,
        "react/prop-types": 1,
        "react/react-in-jsx-scope": 1,
        "react/require-extension": 1,
        "react/self-closing-comp": 1,
        "react/sort-comp": 1,
        "react/wrap-multilines": 1,

        "no-cond-assign": 1,             // disallow assignment in conditional expressions
        "no-console": 0,                 // disallow use of console (off by default in the node environment)
        "no-constant-condition": 1,      // disallow use of constant expressions in conditions
        "no-comma-dangle": 0,            // disallow trailing commas in object literals
        "no-control-regex": 1,           // disallow control characters in regular expressions
        "no-debugger": 1,                // disallow use of debugger
        "no-dupe-keys": 1,               // disallow duplicate keys when creating object literals
        "no-empty": 0,                   // disallow empty statements
        "no-empty-character-class": 1,             // disallow the use of empty character classes in regular expressions
        "no-ex-assign": 1,               // disallow assigning to the exception in a catch block
        "no-extra-boolean-cast": 1,      // disallow double-negation boolean casts in a boolean context
        "no-extra-parens": 0,            // disallow unnecessary parentheses (off by default)
        "no-extra-semi": 1,              // disallow unnecessary semicolons
        "no-func-assign": 1,             // disallow overwriting functions written as function declarations
        "no-inner-declarations": 0,      // disallow function or variable declarations in nested blocks
        "no-invalid-regexp": 1,          // disallow invalid regular expression strings in the RegExp constructor
        "no-negated-in-lhs": 1,          // disallow negation of the left operand of an in expression
        "no-obj-calls": 1,               // disallow the use of object properties of the global object (Math and JSON) as functions
        "no-regex-spaces": 1,            // disallow multiple spaces in a regular expression literal
        "no-reserved-keys": 0,           // disallow reserved words being used as object literal keys (off by default)
        "no-sparse-arrays": 1,           // disallow sparse arrays
        "no-unreachable": 1,             // disallow unreachable statements after a return, throw, continue, or break statement
        "use-isnan": 1,                  // disallow comparisons with the value NaN
        "valid-jsdoc": 0,                // Ensure JSDoc comments are valid (off by default)
        "valid-typeof": 1,               // Ensure that the results of typeof are compared against a valid string

       // Best Practices
       // These are rules designed to prevent you from making mistakes. They either prescribe a better way of doing something or help you avoid footguns.

         "block-scoped-var": 0,           // treat var statements as if they were block scoped (off by default)
         "complexity": 0,                 // specify the maximum cyclomatic complexity allowed in a program (off by default)
         "consistent-return": 0,          // require return statements to either always or never specify values
         "curly": 1,                      // specify curly brace conventions for all control statements
         "default-case": 0,               // require default case in switch statements (off by default)
         "dot-notation": 1,               // encourages use of dot notation whenever possible
         "eqeqeq": 1,                     // require the use of === and !==
         "guard-for-in": 0,               // make sure for-in loops have an if statement (off by default)
         "no-alert": 1,                   // disallow the use of alert, confirm, and prompt
         "no-caller": 1,                  // disallow use of arguments.caller or arguments.callee
         "no-div-regex": 1,               // disallow division operators explicitly at beginning of regular expression (off by default)
         "no-else-return": 0,             // disallow else after a return in an if (off by default)
         "no-empty-label": 1,             // disallow use of labels for anything other then loops and switches
         "no-eq-null": 0,                 // disallow comparisons to null without a type-checking operator (off by default)
         "no-eval": 1,                    // disallow use of eval()
         "no-extend-native": 1,           // disallow adding to native types
         "no-extra-bind": 1,              // disallow unnecessary function binding
         "no-fallthrough": 1,             // disallow fallthrough of case statements
         "no-floating-decimal": 1,        // disallow the use of leading or trailing decimal points in numeric literals (off by default)
         "no-implied-eval": 1,            // disallow use of eval()-like methods
         "no-labels": 1,                  // disallow use of labeled statements
         "no-iterator": 1,                // disallow usage of __iterator__ property
         "no-lone-blocks": 1,             // disallow unnecessary nested blocks
         "no-loop-func": 0,               // disallow creation of functions within loops
         "no-multi-str": 0,               // disallow use of multiline strings
         "no-native-reassign": 0,         // disallow reassignments of native objects
         "no-new": 1,                     // disallow use of new operator when not part of the assignment or comparison
         "no-new-func": 1,                // disallow use of new operator for Function object
         "no-new-wrappers": 1,            // disallows creating new instances of String,Number, and Boolean
         "no-octal": 1,                   // disallow use of octal literals
         "no-octal-escape": 1,            // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
         "no-proto": 1,                   // disallow usage of __proto__ property
         "no-redeclare": 0,               // disallow declaring the same variable more then once
         "no-return-assign": 1,           // disallow use of assignment in return statement
         "no-script-url": 1,              // disallow use of javascript: urls.
         "no-self-compare": 1,            // disallow comparisons where both sides are exactly the same (off by default)
         "no-sequences": 1,               // disallow use of comma operator
         "no-unused-expressions": 0,      // disallow usage of expressions in statement position
         "no-void": 1,                    // disallow use of void operator (off by default)
         "no-warning-comments": 0,        // disallow usage of configurable warning terms in comments": 1,                        // e.g. TODO or FIXME (off by default)
         "no-with": 1,                    // disallow use of the with statement
         "radix": 1,                      // require use of the second argument for parseInt() (off by default)
         "vars-on-top": 0,                // requires to declare all vars on top of their containing scope (off by default)
         "wrap-iife": 0,                  // require immediate function invocation to be wrapped in parentheses (off by default)
         "yoda": 1,                       // require or disallow Yoda conditions

       // Strict Mode
       // These rules relate to using strict mode.

         "strict": 0,                     // require that all functions are run in strict mode

       // Variables
       // These rules have to do with variable declarations.

         "no-catch-shadow": 1,            // disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
         "no-delete-var": 1,              // disallow deletion of variables
         "no-label-var": 1,               // disallow labels that share a name with a variable
         "no-shadow": 1,                  // disallow declaration of variables already declared in the outer scope
         "no-shadow-restricted-names": 1, // disallow shadowing of names such as arguments
         "no-undef": 2,                   // disallow use of undeclared variables unless mentioned in a /*global */ block
         "no-undefined": 0,               // disallow use of undefined variable (off by default)
         "no-undef-init": 1,              // disallow use of undefined when initializing variables
         "no-unused-vars": [1, {"vars": "all", "args": "none"}], // disallow declaration of variables that are not used in the code
         "no-use-before-define": 0,       // disallow use of variables before they are defined

       // Node.js
       // These rules are specific to JavaScript running on Node.js.

         "handle-callback-err": 1,        // enforces error handling in callbacks (off by default) (on by default in the node environment)
         "no-mixed-requires": 1,          // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
         "no-new-require": 1,             // disallow use of new operator with the require function (off by default) (on by default in the node environment)
         "no-path-concat": 1,             // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
         "no-process-exit": 0,            // disallow process.exit() (on by default in the node environment)
         "no-restricted-modules": 1,      // restrict usage of specified node modules (off by default)
         "no-sync": 0,                    // disallow use of synchronous methods (off by default)

       // Stylistic Issues
       // These rules are purely matters of style and are quite subjective.

         "key-spacing": 0,
         "comma-spacing": 0,
         "no-multi-spaces": 0,
         "brace-style": 0,                // enforce one true brace style (off by default)
         "camelcase": 1,                  // require camel case names
         "consistent-this": [1, "self"],            // enforces consistent naming when capturing the current execution context (off by default)
         "eol-last": 1,                   // enforce newline at the end of file, with no multiple empty lines
         "func-names": 0,                 // require function expressions to have a name (off by default)
         "func-style": 0,                 // enforces use of function declarations or expressions (off by default)
         "new-cap": 0,                    // require a capital letter for constructors
         "new-parens": 1,                 // disallow the omission of parentheses when invoking a constructor with no arguments
         "no-nested-ternary": 0,          // disallow nested ternary expressions (off by default)
         "no-array-constructor": 1,       // disallow use of the Array constructor
         "no-lonely-if": 0,               // disallow if as the only statement in an else block (off by default)
         "no-new-object": 1,              // disallow use of the Object constructor
         "no-spaced-func": 1,             // disallow space between function identifier and application
         "semi-spacing": 1,       // disallow space before semicolon
         "no-ternary": 0,                 // disallow the use of ternary operators (off by default)
         "no-trailing-spaces": 1,         // disallow trailing whitespace at the end of lines
         "no-underscore-dangle": 0,       // disallow dangling underscores in identifiers
         "no-mixed-spaces-and-tabs": 1,   // disallow mixed spaces and tabs for indentation
         "quotes": [1, "single"],         // specify whether double or single quotes should be used
         "quote-props": 0,                // require quotes around object literal property names (off by default)
         "semi": 1,                       // require or disallow use of semicolons instead of ASI
         "sort-vars": 0,                  // sort variables within the same declaration block (off by default)
         "space-after-keywords": 1,       // require a space after certain keywords (off by default)
         "space-in-brackets": 0,          // require or disallow spaces inside brackets (off by default)
         "space-in-parens": 0,            // require or disallow spaces inside parentheses (off by default)
         "space-infix-ops": 1,            // require spaces around operators
         "space-return-throw-case": 1,    // require a space after return, throw, and case
         "max-nested-callbacks": 0,       // specify the maximum depth callbacks can be nested (off by default)
         "one-var": 0,                    // allow just one var statement per function (off by default)
         "wrap-regex": 0,                 // require regex literals to be wrapped in parentheses (off by default)

       // Legacy
       // The following rules are included for compatibility with JSHint and JSLint. While the names of the rules may not match up with the JSHint/JSLint counterpart, the functionality is the same.

         "max-depth": 0,                  // specify the maximum depth that blocks can be nested (off by default)
         "max-len": 0,                    // specify the maximum length of a line in your program (off by default)
         "max-params": 0,                 // limits the number of parameters that can be used in the function declaration. (off by default)
         "max-statements": 0,             // specify the maximum number of statement allowed in a function (off by default)
         "no-bitwise": 1,                 // disallow use of bitwise operators (off by default)
         "no-plusplus": 0                 // disallow use of unary operators, ++ and -- (off by default)
     }
}