.babelrc

{
    "env": {
        "development": {
            "presets": [
	            [
	            	"env",
	            	{
	            		"targets": {
	            			"chrome": 45,
	            			"node": "current"
	            		},
	            		"useBuiltIns": false,
	            		"modules": false
	            	}
	            ], 
	            "react",
	            "stage-0"
	        ],
            "plugins": [
                "react-hot-loader/babel"
            ]
        },
        "production": {
            "presets": [
	            [
	            	"env",
	            	{
	            		"targets": {
	            			"chrome": 56,
	            			"node": "current"
	            		},
	            		"useBuiltIns": true,
	            		"modules": false
	            	}
	            ], 
	            "react",
	            "stage-0"
	        ]
        }
    }
}