.babelrc

{
  "presets": [
    // "env",
    [
      "@babel/preset-env",
      {
        "corejs": 3,
        "modules": "commonjs", // resolves https://github.com/noppa/ng-hot-reload/issues/31
        "shippedProposals": true,
        "useBuiltIns": "usage"
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-object-rest-spread",
    "@babel/plugin-transform-object-assign",
    [
      // By default, this plugin will attempt to add annotations to common AngularJS code patterns.
      // This behavior can be disabled (requiring you to mark up functions with /* @ngInject */ or 'ngInject')
      // https://www.npmjs.com/package/babel-plugin-angularjs-annotate
      "angularjs-annotate",
      {
        "explicitOnly": false
      }
    ]
  ]
}