webio-jupyterlab-provider broken with JupyterLab v4

[baumgold]

The bug

It appears that the webio-jupyterlab-provider extension is incompatible with JupyterLab v4.0.8

Context

When I upgraded to JupyterLab v4.0.8 the webio-jupyterlab-provider stopped working (notice the "X"):

$ jupyter labextension list
JupyterLab v4.0.8
~/miniconda3/share/jupyter/labextensions
        webio-jupyterlab-provider v0.1.0 enabled  X (python, webio_jupyter_extension)
        @jupyter-widgets/jupyterlab-manager v5.0.9 enabled OK (python, jupyterlab_widgets)
        @jupyter-notebook/lab-extension v7.0.6 enabled OK


   The following extensions are outdated:
        webio-jupyterlab-provider

   Consider checking if an update is available for these packages.

After I downgraded back to JupyterLab v3.6.7 the extension started working again (notice the "OK"):

JupyterLab v3.6.7
~/miniconda3/share/jupyter/labextensions
        webio-jupyterlab-provider v0.1.0 enabled OK (python, webio_jupyter_extension)
        @jupyter-widgets/jupyterlab-manager v5.0.9 enabled OK (python, jupyterlab_widgets)

Julia info:

julia> Pkg.status("WebIO")
Status `~/.julia/environments/v1.10/Project.toml`
  [0f1e0344] WebIO v0.8.21

julia> versioninfo()
Julia Version 1.10.0
Commit 3120989f39b (2023-12-25 18:01 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 48 × Intel(R) Xeon(R) Gold 6136 CPU @ 3.00GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, skylake-avx512)
  Threads: 5 on 48 virtual cores
Environment:
  JULIA_NUM_THREADS = 4

[andrew-at-rotor]

I experienced the same thing with jupyterlab v4 and julia 1.9.3. After downgrading to jupyterlab 3.6.7, I see that the extension is "OK" but see

The WebIO Jupyter extension was not detected

when using PlotlyJS in the REPL.

Do you see this error with using julia 1.10?

[baumgold]

@andrew-at-rotor - I somehow managed to get my system into the same state as you. Julia v1.10 with WebIO v0.8.21 and JupyterLab v3.6.7. jupyter labextension list says the webio-jupyterlab-provider is 'enabled OK' but when I try to use it from Jupyterlab notebook I get:

WebIO not detected.

Please read [the troubleshooting guide](https://juliagizmos.github.io/WebIO.jl/latest/troubleshooting/not-detected/) for more information on how to resolve this issue.

https://juliagizmos.github.io/WebIO.jl/latest/troubleshooting/not-detected/

It's unclear to me what part of my system is problematic.

[archisman-panigrahi]

I came across this issue in Arch Linux. As workaround is to use the package jupyter-nbclassic, with which this package is compatible.

[kdheepak]

There's a number of breaking changes in Jupyter Lab 4.

https://jupyterlab.readthedocs.io/en/latest/extension/extension_migration.html#api-breaking-changes

When I open the console I get these errors:

This particular error might be easy to fix (based on https://discourse.jupyter.org/t/model-metadata-get-is-not-a-function/19758):

the API has changed in this respect between jlab 3 and 4

you should now use model.getMetadata()
as well as similarly setMetadata() and deleteMetadata()

But I'm not sure how many more breaking changes are there.

I naively tried to run the upgrade extension to start working on a PR but got different errors in every folder.

https://jupyterlab.readthedocs.io/en/latest/extension/extension_migration.html#upgrading-extension-using-the-upgrade-script

I can try to help with this change to get it working, but I don't have any experience in jupyter lab extensions. Can anyone offer some direction on how to go about this?

[kdheepak]

I wanted to give a friendly bump on this thread. Currently no widgets work in jupyter v4 e.g. JuliaGizmos/Interact.jl#421

I have some time I can put toward looking into this this week, but I'm coming in with no knowledge of jupyter widgets or even observables. If someone can offer some insight that'd be great!

[paulnakroshis]

This is my biggest issue with Jupyterlab --- no working widgets. I am using the jupyterlab-desktop app and If I try to make a plot with a slider, the plot displays but without a slider. This is why I end up using Pluto notebooks when I need this capability. Does ANYONE know if a fix is in the works? This is a hugely useful feature to have....