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jakubfiala / atrament

A small JS library for beautiful drawing and handwriting on the HTML Canvas.
http://fiala.space/atrament/demo
MIT License
1.55k stars 116 forks source link

UncaughtReferenceError: 'Atrament' not defined #44

Closed persinammon closed 4 years ago

persinammon commented 4 years ago

Hi,

Sorry if this is the wrong way to do it, I'm not used to Github issues.

I tried using your library, but I'm getting an UncaughtReferenceError: 'Atrament' not defined error and I'm not sure what I'm doing wrong. I link it in < head > tag as your code saved in my own file, then I do the syntax from the documentation. Am I missing a dependency?

My repo is at https://keybase.pub/mgnica/website/ and the page using it is https://mgnica.keybase.pub/website/you.html for reference.

jakubfiala commented 4 years ago

Hi there @mgnica - thanks for submitting the issue, I had a look and it seems we stopped binding the Atrament class to window at some point. That's why you can't access it when you include the script via the <head> tag.

I'm going to fix this and let you know once the update has been pushed. Happy new year!

persinammon commented 4 years ago

Happy new year! It looks like a great drawing tool, thanks for making it.

jakubfiala commented 4 years ago

Hi @mgnica - I have now published Atrament 1.0.0 with a whole bunch of long-needed updates, including a fix for your issue. If you download the latest atrament.min.js you should be good to go.

Note that some of the updates introduce breaking API changes, so please have a look at the updated readme to see what has changed :)

persinammon commented 4 years ago

Hi @jakubfiala two things a) i wrote a submit button to export image then open in new window. the image is not being exported though, it's just a blank page. as a sidenote, i want to make it so it exports then downloads the image without leaving the page, do you know how to do that? It's a slog to find online. b) is there a draggable palette so users could change colors? i guess i could help code it too seeing that i want it, would that be a fork then add on? edit: Oh yeah, the drawing part works now, yaaay :D

jakubfiala commented 4 years ago

Heya, a) can you console.log the string that's returned by toImage() and paste it here? (if it's not too long) b) I think the palette would be out of the scope of this library - I'm trying to keep the features to a minimum to avoid bloat; the goal is mainly to provide the drawing algorithms and let developers build the UI around them :) but feel free to publish it as a separate package!

persinammon commented 4 years ago

So the error is Not allowed to navigate top frame to data URL: data:image/png;base64,iVBORw0KGgoAAAANS [i truncated] and the string is data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAlgAAAJYCAYAAAC+ZpjcAAAdsUlEQVR4Xu3WMREAAAgDMerfNCZ+DAI65Bh+5wgQIECAAAECBFKBpWvGCBAgQIAAAQIETmB5AgIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBAQWH6AAAECBAgQIBALCKwY1BwBAgQIECBAQGD5AQIECBAgQIBALCCwYlBzBAgQIECAAAGB5QcIECBAgAABArGAwIpBzREgQIAAAQIEBJYfIECAAAECBAjEAgIrBjVHgAABAgQIEBBYfoAAAQIECBAgEAsIrBjUHAECBAgQIEBAYPkBAgQIECBAgEAsILBiUHMECBAgQIAAAYHlBwgQIECAAAECsYDAikHNESBAgAABAgQElh8gQIAAAQIECMQCAisGNUeAAAECBAgQEFh+gAABAgQIECAQCwisGNQcAQIECBAgQEBg+QECBAgQIECAQCwgsGJQcwQIECBAgAABgeUHCBAgQIAAAQKxgMCKQc0RIECAAAECBASWHyBAgAABAgQIxAICKwY1R4AAAQIECBB4CI8CWV89EyAAAAAASUVORK5CYII=

persinammon commented 4 years ago

wow, that's really long. b) ok, yah sure. i'll release when done :D

jakubfiala commented 4 years ago

Okay, the dataURL seems fine, so it must be that the browser is refusing to open the window. I'd suggest finding another way to download the drawing, such as creating an <img> element and setting the src to the dataURL, or using <a href="..." download="image.png"></a>. Anyways, I'm going to close this issue as the import bug has been resolved.