Corrupts altair in VS Code

[NickCrews]

Notebook: solara_altair_bug.ipynb.zip

Overview screenshot:

I started with an altair chart (in a venv, in a .ipynb file in VSCode's native notebook editor), which worked (displayed as expected)

import altair as alt
import pandas as pd
import solara

source = pd.DataFrame({"a": ["A", "B", "C"], "b": [28, 55, 43]})
chart = alt.Chart(source).mark_bar().encode(y="a", x="b")
chart

Then, if I import solara; solara.FigureAltair(chart), I don't see any output, and then if I try to just look back at the plain altair chart again, I get
Error loading script: Script error for "./_solara/cdn/vega-embed@6/build/vega-embed.min.js" https://requirejs.org/docs/errors.html#scripterror

Even if I restart the kernel, and just use altair (don't import or run anything solara-related), then I still get this error. I have to reload the VSCode window in order for altair to begin working again.

Running in VSCode:
Version: 1.85.1 (Universal)
Commit: 0ee08df0cf4527e40edc9aa28f4b5bd38bbff2b2
Date: 2023-12-13T09:48:06.308Z (3 wks ago)
Electron: 25.9.7
ElectronBuildId: 25551756
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Darwin arm64 23.1.0

[NickCrews]

If I monkeypatch

solara/solara/widgets/vue/vegalite.vue

Lines 110 to 112 in 8130101

	getCdn() {
	return (typeof solara_cdn !== "undefined" && solara_cdn) || `${this.getBaseUrl()}_solara/cdn`;
	}

and force it to always return "https://cdn.jsdelivr.net/npm", then it works! So something in that logic makes the CDN lookup fail.