IPywidgets reference guide does not mention you should add "ipywidgets" to pn.extension

[MarcSkovMadsen]

I'm creating a larger app where I optionally want to display Ipywidgets/ IPyleaflet if a button is clicked. I can see that in order for ipyleaflet to get loaded on button click I need to "ipywidgets" when I run pn.extension. This is not mentioned in the reference guide https://panel.holoviz.org/reference/panes/IPyWidget.html#panes-gallery-ipywidget.

Solution

Replace pn.extension with pn.extension("ipywidgets") in the reference guide.

Additional Context

If I instantiate ipyleaflet as a part of serving the application ipyleaflet loads without problems.

[philippjfr]

It's a slightly hairy issue, the problem is that if you load pn.extension('ipywidgets') in JupyterLab this will break the entire JupyterLab UI, which is why for the notebook we use a completely separate ipywidgets implementation. That said the reference guide is exactly the right place to explain those caveats.