.babelrc

{
    "presets": [
        // "env",
        [
            "@babel/preset-env",
            {
                "corejs": 3,
                "modules": false, // `false` will not transform ES6 module syntax
                "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
            }
        ],
        [
            // https://www.npmjs.com/package/babel-plugin-ng-hot-reload
            "babel-plugin-ng-hot-reload",
            {
                // TODO: determine if this should be `true`
                "angularGlobal": false, // "angular" would be the on state
                "forceRefresh": true,
                // If true, the library attempts to preserve some state in scope and controller instances when they are reloaded.
                // Preserving state is an experimental feature and quite "hackish" so it may cause problems in some cases.
                // Setting this to false might help if you run into weird errors.
                "preserveState": true,
                "angularReference": "require('angular'), angular"
            }
        ]
    ]
}