This is expressed as loader and exposes custom values in the loader context, as illustrated in the following code block:

use: [
    {
       loader: worker-loader
    }
]

You can see from the preceding code example how this option can be used in the configuration file. This example should look familiar to anyone following this guide and configuring loaders. This example uses worker-loader by way of example only. Some of these options are a Boolean or a binary, such as the profile option, described next.