sourcePreview

function · packages/mixins-richtext/src/source.ts:200

function sourcePreview<Message>(): SlotView.SlotView<
  typeof SourcePreviewSlots,
  SourcePreviewInput,
  Message
>

The draft as the document it would become, for split mode: drawn beside sourceEditor, it shows what switching back would commit. It is the read-only renderer's output, so it dispatches nothing, and it shares the editor's parse of the draft.