The `setContent` command replaces the document with a new one. You can pass JSON or HTML, both work fine. It’s basically the same as setting the `content` on initialization.
By default, it doesn’t trigger the update event. Passing `true` doesn’t prevent triggering the update event.
`parseOptions?: AnyObject`
Options to configure the parsing can be passed during initialization and/or with setContent. Read more about parseOptions in the [ProseMirror documentation](https://prosemirror.net/docs/ref/#model.ParseOptions).