{
    "presets": [
        [
            "@babel/preset-env",
            {
                "useBuiltIns": "usage", // uses browserslist config in package.json to auto-inject polyfills where needed
                "corejs": 3, // use corejs version 3 as the source for polyfills
                "modules": false // don't transform es6 modules; webpack 4 handles them natively
            }
        ]
    ],
    "env": {
        "test": {
            "presets": ["@babel/preset-env"]
        }
    }
}
