[Bug] TypeError: Cannot read properties of undefined (reading 'extend') in pydeck Jupyter Widget

Description

Description:

The error in question occurs on loading the jupyterlab UI, is present in the browser console, and prevents the deck.gl widget from loading when used in notebooks.

Actual Behavior:

The following error message appears in the browser console:

index.out.js:687 TypeError: Cannot read properties of undefined (reading 'extend')

Flavors

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

Expected Behavior

Expected Behavior:

The jupyter widget should load successfully without errors.

Steps to Reproduce

Steps to Reproduce:

1. Run the following commands (from https://deckgl.readthedocs.io/en/latest/contributing.html):

   # Build and prepare pydeck + jupyter extension
   git clone https://github.com/ClayMav/deck.gl # My fork contains some fixes to even get this far
   cd deck.gl/bindings/pydeck
   make setup-env
   . env/bin/activate
   make init
   make prepare-jupyter
   
   # Run jupyter lab
   jupyter lab
   

2. Open the web UI and inspect the console

Additional Information:

Output from jupyter labextension list: (to show that the extension is being loaded successfully)

Note: The extension is also shown in the extensions section of the jupyterlab interface.

JupyterLab v4.1.3
/opt/homebrew/share/jupyter/labextensions
        jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
        jupyter-leaflet v0.18.1 enabled OK
        @jupyter-widgets/jupyterlab-manager v5.0.10 enabled OK (python, jupyterlab_widgets)

Other labextensions (built into JupyterLab)
   app dir: /Volumes/CaseSensitive/deck.gl/bindings/pydeck/env/share/jupyter/lab
        @deck.gl/jupyter-widget v9.0.0-beta.6 enabled OK*


   local extensions:
        @deck.gl/jupyter-widget: /Volumes/CaseSensitive/deck.gl/modules/jupyter-widget

We suspect the issue might be related to a missing dependency in the jupyter-widget module but are unable to pinpoint the exact cause.

Request:

Any insights or suggestions to help identify the cause of this error and potential solutions would be greatly appreciated.

Environment

• Framework version: deck.gl@9.0.0-beta.6
• Browser: Chrome 1.62.162
• OS: MacOS 13.6.3 (22G436) (Arm)

Logs

No response

Reproduce the failure from bindings/pydeck using make setup-env, make init, make prepare-jupyter, then run jupyter lab and inspect the browser console. Compare the jupyter-widget module and the index.out.js location named in the error, focusing on the suspected missing dependency. Done means the @deck.gl/jupyter-widget loads in JupyterLab without the TypeError.