[Bug] Zoom level not monotonic on mouse wheel (?) event (i.e., mac touchpad)

[ilan-gold]

Description

Hello again! When I log the zoom level from a mouse wheel event (sorry if the name is wrong, I am using a mac touchpad on my laptop), the zoom level is not monotonic. I have a suspicion that this is throwing off some layers I have that rely on the zoom level for rendering.

Flavors

• Script tag
• React
• Python/Jupyter notebook
• MapboxOverlay
• GoogleMapsOverlay
• CartoLayer
• ArcGIS

Expected Behavior

I would expect the zoom level to be monotonic increasing/decreasing, but instead get:

Steps to Reproduce

In my case I altered the DeckGL component in examples/website/orthographic to have onViewStateChange={({viewState}) => console.log(viewState.zoom)} and saw the above screenshot. The interleaving effect of zoom levels was apparent.

Environment

• Framework version: main branch at time of writing (but also dating back somewhat far - the effect seems to be playing out on avivator.gehlenborglab.org on FF with the scale bar or with side-by-side on chrome where they move out of sync).
• Browser: FF 127.0.2 or Chrome 125.0.6422.176
• OS: MacOS 13.6.1 (22G313)

Logs

-0.9221760184089745 app.tsx:198:50
-0.668107634660729 app.tsx:198:50
-0.9221760184089745 app.tsx:198:50
-1.1586145932543173 app.tsx:198:50
-0.9221760184089745 app.tsx:198:50
-1.1586145932543173 app.tsx:198:50
-1.3831254525200256 app.tsx:198:50
-1.1586145932543173 app.tsx:198:50
-1.3831254525200256 app.tsx:198:50
-1.5955684191940207 app.tsx:198:50
-1.3831254525200256 app.tsx:198:50
-1.5955684191940207 app.tsx:198:50
-1.7958028571084879 app.tsx:198:50
-1.5955684191940207 app.tsx:198:50
-1.7958028571084879 app.tsx:198:50
-1.9836876969406194 app.tsx:198:50
-1.7958028571084879 app.tsx:198:50
-1.9836876969406194 app.tsx:198:50
-2 app.tsx:198:50
-1.9836876969406194 app.tsx:198:50
-2