How to create the Viewer? How to render the content?

[OnkelTem]

I don't understand how to create this viewer thing and there is nothing helpful in the documentation on this.

This is from the docs:

const viewer = new toastui.Editor({
  el: document.querySelector('#viewer'),
  initialValue: content
});

but it doesn't create any Viewer, it just creates the same Editor UI with editable content.

I also found viewer: boolean property among the options, but setting it doesn't make any difference.

So how is it assumed to properly render the content?