Scrolling cells off screen prevents rendering widgets

[rchiodo]

Have a notebook with enough cells that cells scroll off screen.

Render something like bqplot graphs off screen.

Scroll up.

Expected:

• Plots show up
  Actual:
• There's no output.

[rchiodo]

With this prerelease version:

Name: Jupyter
Id: ms-toolsai.jupyter
Description: Jupyter notebook support, interactive programming and computing that supports Intellisense, debugging and more.
Version: 2022.6.1001691033
Publisher: Microsoft
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter

The expected results happen.

[rchiodo]

This notebook will repro the problem:
bqplot_crash.zip

It does crash the extension host, but that's a separate issue:
#10386

[rchiodo]

After about 60 seconds a bunch of errors start popping up

[DonJayamanne]

@rchiodo please could you:

• Provide the first error from the logs
• Look at the network tab and find the first error for failures to download static files (looks like some widget wasn't downloaded)
• Also can you provide the output from your Jupyter console (need to check if its using CDN or not)

[rchiodo]

Here's a log after it didn't render offscreen:
jupyterlog.txt

[rchiodo]

Seems like undoing 94de3cd fixes the problem

[DonJayamanne]

I'd just undo the changes to the `src/webviews/webview-side/ipywidgets/kernel/index.ts`` file

[DonJayamanne]

removing the regression label as it hasn't been shipped yet.

[rchiodo]

Verification steps:

1. Install bqplot, numpy, and pandas into a python environment
2. Open this notebook
   bqplot_test.zip
3. Select the environment you created as the kernel
4. Scroll to the bottom and run all the cells above (there's a button on the notebook cell for running cells above)
5. Scroll back up and there should be plots showing up.

[rebornix]

I'm not able to verify on my machine due to #10386

[rchiodo]

There's a workaround for #10386:

"jupyter.disableZMQSupport": true

[rebornix]

That works great!