modules/frontend/.babelrc

{
    "presets": [
        ["@babel/env", {
            "targets": {
                "browsers": [">1%", "not ie 11", "not op_mini all"]
            }
        }],
        "@babel/preset-typescript"
    ],
    "plugins": [
        ["@babel/plugin-proposal-class-properties", { "loose" : true }],
        "@babel/plugin-proposal-object-rest-spread",
        "@babel/plugin-syntax-dynamic-import",
        "@babel/plugin-transform-parameters"
    ]
}