.babelrc

{
  "plugins": [
    ["@babel/plugin-proposal-object-rest-spread", { "useBuiltIns": true }],
  ],

  "env": {
    "development": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "browsers": [
                "last 2 versions",
                "safari >= 7"
              ],
            },
            "modules": false,
            "useBuiltIns": false,
          }
        ]
      ]
    },

    "production": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "browsers": [
                "last 2 versions",
                "safari >= 7"
              ],
            },
            "modules": false,
            "useBuiltIns": false,
          }
        ]
      ],
    },

    "test": {
      "presets": [
        [
          "@babel/preset-env",{
            "targets": {
              "node": "current",
            },
            "modules": "commonjs",
            "useBuiltIns": false,
          },
        ],
      ],
    }
  }
}