Export

The viewer can turn slides into a range of formats and save the document back to .pptx. Raster formats go through an html2canvas-pro pipeline; PPTX goes through the core serializer.

Supported formats

Format	Pipeline
PNG	html2canvas-pro rasterisation (host-supplied rasterizeSlide) -> canvas.toDataURL()
PDF	jspdf (lazy-loaded) + rasterisation -> multi-page PDF (one slide per page)
GIF	Animated GIF frame encoder (lazy-loaded, gif-encoder.ts)
WebM	MediaRecorder API over a canvas capture stream
PPTX	PptxHandler.save() via saveAs(format) -> Uint8Array (save-as)

Narrower than React

The React binding additionally supports JPEG and a vector SVG export path. The Vue viewer does not currently have an SVG DOM-to-vector serializer or a JPEG output option, only PNG raster export. It does support one extra convenience the React docs don't call out: copy slide as image to the clipboard (onCopySlideAsImage, wired to the toolbar).

How export is triggered

Export is driven by the viewer's UI, not by props or the exposed API:

• The toolbar / export dialog invoke the internal useExportWiring composable (which composes useExport for PNG/PDF, useMediaExport for GIF/WebM, and usePrint for printing), with progress reporting via useExportProgress and cooperative cancellation through an AbortSignal.
• The only public, programmatic way to obtain document bytes is the exposed getContent(), which returns the serialized .pptx Uint8Array, equivalent to the PPTX "save-as" path (saveAs('pptx') internally).

No export prop or exposed method

There is no export prop or defineExpose method for raster/PDF/GIF/WebM export. Those are user-initiated through the toolbar/dialog. If you need to drive rasterisation yourself, the underlying composables (useExport, useMediaExport, usePrint) are reachable via pptx-vue-viewer/composables-unstable, though there is no equivalent of React's standalone renderToCanvas utility exported from the package root.

Print

usePrint (composed via useExportWiring) drives a dedicated print dialog and a rasterised print-window flow, covering slides, notes pages, handouts, and an outline view. It reuses the same off-screen rasterizeSlide the export path drives. There is no separate vector print path.

Pipeline limitations

Raster export inherits the html2canvas-pro constraints (see Limitations):

• backdrop-filter, CSS var(), and CSS 3D transforms are not natively supported, some fidelity is lost in the raster capture.
• mix-blend-mode is approximated; path gradients become elliptical radials.
• Canvas size is capped by the browser's maximum (commonly 16384x16384 or 32768x32768 px depending on browser/GPU), bounding maximum export resolution.

For the underlying save/serialize details of the PPTX format, see Core.