Using Webpack ifdef-loader with Laravel Mix

gistfile1.txt

1. Install ifdef-loader
```bash
yarn add ifdef-loader   
```

2. Add the loader to Webpack through Laravel Mix 'webpackConfig' method. Apparently this doesn't overwrite the defaults but merges it nicely.
```js
mix.webpackConfig({
    module: {
        rules: [            
            {
                test: /\.vue$/,
                use: { loader: 'ifdef-loader', options: { "ifdef-fill-with-blanks": true } }
            },
            {
                test: /\.js$/,
                use: { loader: 'ifdef-loader', options: { "ifdef-fill-with-blanks": true } }
            }
        ]
    }
});
```

3. Profit! Only load modules if your env requires it.
/// #if process.env.MIX_THEME == 'ajax'
import axios from "axios";
axios.defaults.headers.common['X-WP-Nonce'] = game_api.nonce;
Vue.prototype.$http = axios;
/// #endif