Listen for changes and display a loading view

[Christian]

While creating the canvas would be nice to display some kind of loading view instead of a blank view

[Jeremy Harris]

So, I'm not the maintainer, but I was stuck with the same issue, and see that it's possible to await the raw data, via:

qrCode.getRawData("svg").then(data => console.log(data));

That might give you what you need to trigger a loader while you're awaiting it to render.