Where is the promise?

[pjebs]

I have a link to a font that does not exist because the internet is down.

let fonts = {
	'Courier Prime': {
		normal: 'https://fonts.cdnfonts.com/s/16424/Courier Prime.woffx' // doesn't exist
	}
};
docDefinition = ...
const pdfDocGenerator = pdfMake.createPdf(docDefinition, null, fonts);
	pdfDocGenerator.getBlob((blob) => {
		// 
	});

Since the font doesn't exist, I see an error on the client side console:

URLBrowserResolver.js:47          GET https://fonts.cdnfonts.com/s/16424/Courier%20Prime.woffx net::ERR_FAILED 404
(anonymous) @ URLBrowserResolver.js:47
fetchUrl @ URLBrowserResolver.js:10
(anonymous) @ URLBrowserResolver.js:61
URLBrowserResolver.resolve @ URLBrowserResolver.js:59
Document._createDoc @ pdfMake.js:61
Document.getBuffer @ pdfMake.js:257
Document.getBlob @ pdfMake.js:244
generatePDF @ pdf.ts:83
savePDF @ index.svelte? [sm]:68
(anonymous) @ index.mjs:996
bubble @ index.mjs:996
click_handler @ SideNavMenuItem.svelte? [sm]:18
URLBrowserResolver.js:23 Uncaught (in promise) TypeError: Failed to fetch (url: "https://fonts.cdnfonts.com/s/16424/Courier Primex.woff")
    at URLBrowserResolver.js:23:1

How can I catch this uncaught promise and act appropriately?

[liborm85]

Versions 0.1.x and 0.2.x not support promises.
Promises are added in version 0.3, which is in beta state, see #2375.

[pjebs]

I'm using 0.2.x. why did the error message say promise not caught. See bottom

[liborm85]

Because fetching fonts uses promises to download file.

[pjebs]

How can I handle that if the internet goes down?

[liborm85]

Is is not possible. Is solved in version 0.3.

[pjebs]

Can v 0.2 be updated? Is v0.3 nearly prod ready?

[liborm85]

Version 0.2 support only callbacks, cannot be changed due to backward compatibility. Version 0.3 is in beta state, date of final release is unknown.

[alxvallejo]

You can wrap it in a promise as such:

const generatePdf = (docInfo) => {
	return new Promise((resolve, reject) => {
		let doc = new PdfPrinter(FONTS).createPdfKitDocument(docInfo);
		let chunks = [];
		let result;

		doc.on('data', function (chunk) {
			chunks.push(chunk);
		});
		doc.on('end', function () {
			result = Buffer.concat(chunks);
			resolve('data:application/pdf;base64,' + result.toString('base64'));
		});
		doc.on('error', (error) => reject(error));
		doc.end();
	});
};