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Convert examples/components/pageviewer.js to await/async (issue 14127) #14299

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Nov 24, 2021
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Convert examples/components/pageviewer.js to await/async (issue 14127) #14299

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46 changes: 23 additions & 23 deletions examples/components/pageviewer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,28 +47,28 @@ const loadingTask = pdfjsLib.getDocument({
cMapPacked: CMAP_PACKED,
enableXfa: ENABLE_XFA,
});
loadingTask.promise.then(function (pdfDocument) {
(async function () {
const pdfDocument = await loadingTask.promise;
// Document loaded, retrieving the page.
return pdfDocument.getPage(PAGE_TO_VIEW).then(function (pdfPage) {
// Creating the page view with default parameters.
const pdfPageView = new pdfjsViewer.PDFPageView({
container,
id: PAGE_TO_VIEW,
scale: SCALE,
defaultViewport: pdfPage.getViewport({ scale: SCALE }),
eventBus,
// We can enable text/annotation/xfa/struct-layers, as needed.
textLayerFactory: !pdfDocument.isPureXfa
? new pdfjsViewer.DefaultTextLayerFactory()
: null,
annotationLayerFactory: new pdfjsViewer.DefaultAnnotationLayerFactory(),
xfaLayerFactory: pdfDocument.isPureXfa
? new pdfjsViewer.DefaultXfaLayerFactory()
: null,
structTreeLayerFactory: new pdfjsViewer.DefaultStructTreeLayerFactory(),
});
// Associate the actual page with the view, and draw it.
pdfPageView.setPdfPage(pdfPage);
return pdfPageView.draw();
const pdfPage = await pdfDocument.getPage(PAGE_TO_VIEW);
// Creating the page view with default parameters.
const pdfPageView = new pdfjsViewer.PDFPageView({
container,
id: PAGE_TO_VIEW,
scale: SCALE,
defaultViewport: pdfPage.getViewport({ scale: SCALE }),
eventBus,
// We can enable text/annotation/xfa/struct-layers, as needed.
textLayerFactory: !pdfDocument.isPureXfa
? new pdfjsViewer.DefaultTextLayerFactory()
: null,
annotationLayerFactory: new pdfjsViewer.DefaultAnnotationLayerFactory(),
xfaLayerFactory: pdfDocument.isPureXfa
? new pdfjsViewer.DefaultXfaLayerFactory()
: null,
structTreeLayerFactory: new pdfjsViewer.DefaultStructTreeLayerFactory(),
});
});
// Associate the actual page with the view, and draw it.
pdfPageView.setPdfPage(pdfPage);
return pdfPageView.draw();
})();