.babelrc

{
    "presets": [
        [
            "@babel/preset-env",
            {
                "targets": [
                    "last 2 versions",
                    "not dead",
                    "not < 2%",
                    "not ie 11"
                ]
            }
        ],
        "@babel/preset-react"
    ],

    "plugins": [
        "react-hot-loader/babel",
        "@babel/plugin-proposal-class-properties",
        "@babel/plugin-syntax-dynamic-import"
    ]
}