.babelrc

{
    "presets": [
        [
            "@babel/preset-env",
            {
                "targets": [
                    "last 3 Chrome major versions",
                    "last 3 ChromeAndroid major versions",
                    "last 3 Firefox major versions",
                    "last 3 Edge major versions",
                    "last 3 Safari major versions",
                    "last 3 iOS major versions"
                ],
                "useBuiltIns": false,
                "shippedProposals": true,
                "modules": false,
                "bugfixes": true
            }
        ]
    ],
    "plugins": [
        ["@babel/plugin-proposal-class-properties"],
        ["@babel/plugin-proposal-decorators", { "decoratorsBeforeExport": true }]
    ],
    "assumptions": {
        "setPublicClassFields": true
    }
}