.babelrc

{
    "env": {
        "cjs": {
            "presets": [
                ["env", {
                    "targets": {
                        "browsers": ["last 2 versions"]
                    }
                }],
                "react"
            ],
            "plugins": [
                "transform-react-jsx",
                "add-module-exports",
                ["babel-plugin-transform-builtin-extend", {
                    "globals": ["Error"]
                }],
                ["transform-runtime", {
                    "polyfill": false,
                    "regenerator": true
                }],
                "transform-class-properties",
                "transform-object-rest-spread",
                "transform-export-extensions",
                "transform-async-to-generator",
                "syntax-trailing-function-commas"
            ]
        },
        "esm": {
            "presets": [
                ["env", {
                    "modules": false,
                    "targets": {
                        "browsers": ["last 2 versions"]
                    }
                }],
                "react"
            ],
            "plugins": [
                "transform-react-jsx",
                ["babel-plugin-transform-builtin-extend", {
                    "globals": ["Error"]
                }],
                ["transform-runtime", {
                    "polyfill": false,
                    "regenerator": true
                }],
                "transform-class-properties",
                "transform-object-rest-spread",
                "transform-export-extensions",
                "transform-async-to-generator",
                "syntax-trailing-function-commas"
            ]
        },
    },
}