[BUG] Dash 2.11 triggers build recommended for @plotly/dash-jupyterlab

[melanopsis]

Greetings,

After upgrading to Dash v2.11, I see a build recommended pop-up window for @plotly/dash-jupyterlab.

jupyter-labextension list shows

Other labextensions (built into JupyterLab)
   app dir: /usr/local/share/jupyter/lab
        @plotly/dash-jupyterlab v0.4.3 enabled OK

Build recommended, please run `jupyter lab build`:
    @plotly/dash-jupyterlab needs to be included in build

Here are the installed dash packages

dash                         2.11.0
dash-bootstrap-components    1.4.1
dash-core-components         2.0.0
dash-daq                     0.5.0
dash-extensions              1.0.1
dash-html-components         2.0.0
dash-table                   5.0.0

Observed both with JupyterLab v3.6.4 and v3.6.5

Secondary build shouldn't be required

[likewei92]

I'm seeing this too, is it possible to switch to using a prebuilt extension?

[Coding-with-Adam]

hi @likewei92
Are you seeing this in later versions of Dash as well? version 2.12 or 2.14?

[likewei92]

yes. Actually it only happens after 2.11. But this should not be a surprise? It's mentioned in the docs here: https://dash.plotly.com/dash-in-jupyter#display-modes

"To use jupyterlab mode, you'll also need to build the @plotly/dash-jupyterlab extension. When you launch a new JupyterLab notebook after installing Dash, you'll be prompted to build @plotly/dash-jupyterlab."

[gvwilson]

Hi - we are tidying up stale issues and PRs in Plotly's public repositories so that we can focus on things that are most important to our community. If this issue is still a concern, please add a comment letting us know what recent version of our software you've checked it with so that I can reopen it and add it to our backlog. (Please note that we will give priority to reports that include a short reproducible example.) If you'd like to submit a PR, we'd be happy to prioritize a review, and if it's a request for tech support, please post in our community forum. Thank you - @gvwilson

[krassowski]

Hi @gvwilson, a JupyterLab maintainer here. Just FYI using source extensions is deprecated and I would warmly encourage you to ship a prebuilt extension instead as it is much better UX for users. Otherwise, you are just missing out on anyone who cannot find a right combination of node.js and other tooling (or cannot install them altogether).

Of note, plotly itself ships a prebuilt extension since plotly/plotly.py#3142 (with a follow up fix in plotly/plotly.py#3231).

The prebuilt extensions are documented in https://jupyterlab.readthedocs.io/en/latest/extension/extension_dev.html#overview-of-extensions

This was previously tracked in plotly/jupyter-dash#49.

[gvwilson]

cc @marthacryan