renderHeadless()
Render a specific spine item document headless. Spine items can have more than one document iframe rendered (PDF for example render an extra canvas to show the page) but the document that matters to you is the one containing the actual content.
const document$ = reader.renderHeadless(3)
Reference
renderHeadless(spineItem)
function locateResource(spineItem: SpineItemReference): Observable<{
doc: Document;
release: () => void;
} | undefined>
Parameters
spineItem
: A reference to a spine item (index, id, ...)
Returns
Observable<{
doc: Document;
release: () => void;
} | undefined>
An observable containing frame document or undefined
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