babel.config.json

{
    "presets": [
        "@babel/preset-typescript"
    ],
    "plugins": [
    ],
    "env": {
        "cjs": {
            "presets": [
                "@babel/preset-env",
                "@babel/preset-typescript"
            ]
        },
        "test": {
            "presets": [
                "@babel/preset-env",
                "@babel/preset-typescript"
            ]
        },
        "node": {
            "presets": [
                [
                    "@babel/preset-env",
                    {
                        "targets": {
                            "node": "14"
                        },
                        "modules": false
                    }
                ],
                [
                    "@babel/preset-typescript",
                    {
                        "targets": {
                            "node": "14"
                        },
                        "modules": false
                    }
                ]
            ]
        }
    }
}