There seems to be a missing browser feature required by Chartjs 3 (ResizeObserver), perhaps would it be necessary to add a new polyfill.

There seems to be a missing browser feature required by Chartjs 3 (ResizeObserver), perhaps would it be necessary to add a new polyfill.

You're right - it WAS missing in the test environment. I polyfilled it there. But I don't think we need to polyfill it for the users, if that's what you meant (let me know if that IS what you were thinking and let's chat).

I have just one more tweak on this one - it's in the "externals" of the built file (if you build the file right now, the dist file will "contain" chartjs instead of just having the import line). I know the fix - I just need to make a nice addition to the build system for it.

This is now ready!

Could you squash your commits? I can't do it automatically due to two authors :)

ChartJS is now at v3.6.2. Is it something to change in this PR since it's based on v3.4.1?

The 3.4.1 only means that it's the minimum version. In reality, if you installed this, you would have ^3.4.1 in your package.json, but yarn/npm would install the latest version 3 (so 3.6.2). It's really not a big deal one way or another, but I'd say just keep it.

I've got it rebased to only 2 commits - that's how (I think) we should keep it.

Thanks @weaverryan.