babel.config.json

{
    "presets": [
        "@babel/preset-env",
        "@babel/preset-react"
    ],
    "plugins": [
        "@babel/plugin-transform-runtime",
        [
            "@babel/plugin-proposal-class-properties",
            {
                "loose": true
            }
        ],
        [
            "@babel/plugin-transform-spread",
            {
                "loose": true
            }
        ],
        "@babel/plugin-syntax-dynamic-import",
        "@babel/plugin-transform-async-to-generator",
        "@babel/plugin-transform-react-jsx"
    ],
    "sourceMaps": true,
    "env": {
        "production": {
            "presets": [
                "react-optimize"
            ]
        },
        "client": {
            "plugins": [
                "@babel/plugin-syntax-dynamic-import"
            ]
        },
        "server": {
            "plugins": [
                "dynamic-import-node",
                "@babel/plugin-proposal-object-rest-spread"
            ]
        },
        "test": {
            "plugins": [
                "dynamic-import-node"
            ]
        },
        "e2e": {
            "plugins": [
                "@babel/plugin-syntax-dynamic-import",
                "istanbul"
            ]
        }
    }
}