Skip to main content

ZoomEvent

Reports the reader's magnification, including changes the reader makes with a pinch or a double tap rather than through setZoom.

scale is relative to the fitted page - 1 means one page sized to the viewport - rather than being a raw platform scale factor, which would depend on the page's own dimensions and so mean something different in every publication (and, in a scanned one, on every page).

Web only. iOS and Android hand a PDF to PDFKit and AndroidPdfViewer respectively, both of which zoom on a pinch by themselves and report nothing back, so there is nothing to relay there.

Properties​

scale​

scale: number;

Current magnification, where 1 is the page fitted to the reader.

min​

min: number;

Smallest scale the current layout allows.

max​

max: number;

Largest scale the current layout allows.