Pinch to zoom not centred when embedded

[wahlatlas]

Check these examples:

Pinch to zoom on a GridViz instance that takes the whole window works like expected, e.g. this one, where the zoom center roughly stays the same
https://eurostat.github.io/gridviz/examples/DE.html

Pinch to zoom in an embedded view (Observable or other) zooms the map but also moves the map in a north-eastern direction so that the detail you wanted to zoom in moves out of the viewport, e.g. in this example
https://observablehq.com/d/3d1d998ba43e1f69

See video here for detail on an iPad pro (iOS 17.1)
https://wahlatlas.net/experimente/testcases/gridviz_pinch_zoom_issue118.mp4

in the video the issue may look subtle, but there are cases, smaller embed, more removed from window edges, where this makes zooming on touch devices a two part action: first zoom, then drag backwards to the original position

[jgaffuri]

Indeed !
I will have a look. In general, we should make more tests on non-full screen examples for this kind of feature.

[joewdavies]

I believe I may have fixed this: https://eurostat.github.io/gridviz/examples/test/embed/observable.html
As of version 3.0.18
Please check and let us know!
Thanks