I'm exploring EsLint for my React JS ES6 project and I'm immediately stuck.
I've created an .eslintrc.json exactly like here:

{

    parserOptions: {

        ecmaVersion: 6,

        sourceType: module,

        ecmaFeatures: {

            jsx: true

        },

    },

    rules: {

        semi: 2

    }

}

What do I do now?

Cannot read config file: /Users/eric/af/frontend_app/.eslintrc.json

Error: Unexpected token }

SyntaxError: Cannot read config file: /Users/eric/af/frontend_app/.eslintrc.json

Error: Unexpected token }

    at Object.parse (native)

    at loadJSONConfigFile (/usr/local/lib/node_modules/eslint/lib/config/config-file.js:117:21)

    at loadConfigFile (/usr/local/lib/node_modules/eslint/lib/config/config-file.js:210:26)

    at Object.load (/usr/local/lib/node_modules/eslint/lib/config/config-file.js:437:18)

    at loadConfig (/usr/local/lib/node_modules/eslint/lib/config.js:67:33)

    at getLocalConfig (/usr/local/lib/node_modules/eslint/lib/config.js:129:23)

    at Config.getConfig (/usr/local/lib/node_modules/eslint/lib/config.js:223:22)

    at processText (/usr/local/lib/node_modules/eslint/lib/cli-engine.js:155:27)

    at processFile (/usr/local/lib/node_modules/eslint/lib/cli-engine.js:227:18)

    at executeOnFile (/usr/local/lib/node_modules/eslint/lib/cli-engine.js:603:23)

My EsLint version:

$ eslint -v

v2.4.0

I've tried changing the name of the same config file to .eslintrc.js and I've got this:

Cannot read config file: /Users/eric/af/frontend_app/.eslintrc.js

Error: /Users/eric/af/frontend_app/.eslintrc.js:2

    parserOptions: {

                   ^

Unexpected token :

/Users/eric/af/frontend_app/.eslintrc.js:2

    parserOptions: {

                   ^

SyntaxError: Unexpected token :

    at exports.runInThisContext (vm.js:73:16)

    at Module._compile (module.js:443:25)

    at Object.Module._extensions..js (module.js:478:10)

    at Module.load (module.js:355:32)

    at Function.Module._load (module.js:310:12)

    at Module.require (module.js:365:17)

    at require (module.js:384:17)

    at module.exports (/usr/local/lib/node_modules/eslint/node_modules/require-uncached/index.js:14:12)

    at loadJSConfigFile (/usr/local/lib/node_modules/eslint/lib/config/config-file.js:157:16)

    at loadConfigFile (/usr/local/lib/node_modules/eslint/lib/config/config-file.js:197:22)