.babelrc

{
    "env": {
        "production": {
            "presets": ["es2015", "stage-2"],
            "plugins": [
                "transform-export-extensions",
                ["transform-runtime", {
                    "polyfill": true,
                    "regenerator": true
                }]
            ],
            "comments": false
        },
        "development": {
            "presets": [
                ["env", {
                    "targets": {
                        "chrome": 52
                    }
                }]
            ],
            "plugins": [
                "transform-object-rest-spread",
                 ["transform-runtime", {
                    "polyfill": true,
                    "regenerator": true
                }]
            ]
        }
    }
}