commit:cfae966 broken on firefox

[micuat]

does not load (window is empty) on firefox 78.0.2 (64-bit) on windows 10.

in console,

[micuat]

inspector:

[baku89]

It's because I used OffscreenCanvas for hit detection (which is for "Click to select a path in viewport" feature) and didn't implement its fallback for environments that don't support OffScreenCanvas yet. So I assume the newest version doesn't work in iOS Safari, too.

At present, I'd like to focus on supporting only Chrome since I've been also working for the Electron version. It might be better to show some alerts for such an environment ;)

[baku89]

Oh, I just noticed I don't need to use OffscreenCanvas because I didn't implement HitDetector (for detecting hovering item by cursor's position on the viewport) so that it runs in the Worker thread yet.

[micuat]

commit:198294a works on firefox. should we close this issue...?

[baku89]

Look that way.
For cases like this, it might be better to show the alert message showing the recommended environment for viewers using mobile, IE, and so on.