Component Props

<PowerPointViewer> follows the Vue binding's contract with two Svelte 5 conventions: events are callback props (onload, not @load), and the content prop is named source.

Props

Prop	Type	Default	Description
source	Uint8Array | ArrayBuffer | null	-	Raw .pptx bytes. Assigning a new value loads the new presentation in place.
theme	ViewerTheme	built-in dark	Partial palette / radius / raw CSS vars; see Theming.
locale	string	'en'	UI locale (BCP 47). Register non-English dictionaries via pptx-svelte-viewer/i18n.
initialSlide	number	0	Slide shown after load (0-based, clamped).
showThumbnails	boolean	true	Show the thumbnail sidebar.
showToolbar	boolean	true	Show the navigation/zoom toolbar.
class	string	''	Extra class on the root element.

Event callbacks

Prop	Signature	Fired when
onload	(detail: { slideCount: number; canvasSize: CanvasSize }) => void	A presentation finishes loading.
onerror	(message: string) => void	A load fails (message is human-readable).
onslidechange	(index: number) => void	The active slide changes (0-based).

Type exports

import type {
	CanvasSize,
	PowerPointViewerProps,
	ViewerLoadDetail,
	ViewerTheme,
	ViewerThemeColors,
} from 'pptx-svelte-viewer';

Theme presets and helpers (vermilionLightTheme, vermilionDarkTheme, defaultThemeColors, defaultRadius, themeToCssVars, defaultCssVars) are re-exported from the package root; i18n helpers (registerTranslations, translate, keyToLabel, translationsEn, and the TranslationKey type) live under pptx-svelte-viewer/i18n.