Embed doesn't work anymore? (e.g: Syncing error: no comm channel defined)

[hainm]

Hi there,

I am trying to embed nglview-js-widgets 3.1.0 in my application but getting below error:
https://www.npmjs.com/package/nglview-js-widgets

You could try to download index.html.txt (-> index.html) and open it to see the error message
index.html.txt

If I change the nglview-js-widgets version from 3.1.0 to 3.0.8 in the index.html, thing just work.

3.1.0 version works fine in the notebook and lab.

Do you have idea how to resolve this? Thanks.

[hainm]

Another way to reproduce is

pip install nglview==3.1.0 # ipywidgets 8, notebook 7

And in notebook

# 1st cell
import nglview as nv
view = nv.demo()
view

# 2nd cell
nv.write_html("index.html", view)
!open index.html

[hai-schrodinger]

Syncing error: no comm channel defined'

ipywidgets/packages/base/src/widget.ts

Lines 478 to 482 in b253179

	sync(method: string, model: WidgetModel, options: any = {}): any {
	// the typing is to return `any` since the super.sync method returns a JqXHR, but we just return false if there is an error.
	if (this.comm === undefined) {
	throw 'Syncing error: no comm channel defined';
	}

[hainm]

Seems like an issue with the NGL release instead: nglviewer/ngl#1014