It's not really clear to me what caused the CI to fail here.

From local testing, however, it seems to me that there is some incompatibility with the panel master branch and bokeh 2.3 (?)

@philippjfr Is there something I should be doing to fix this PR?

I'm also trying to set up a development version of bokeh and panel side-by-side (using python setup.py install to build the JS libraries for both bokeh and panel; tried both with bokeh 2.2 and 2.3.0.dev1) but I'm getting issues like those in the browser console and am not sure how to continue:

Hmm, that sounds like problem with bokeh 2.3.0dev1 rather than anything in Panel.

@philippjfr Thanks, indeed this was an issue in my development setup.

The following example seems to work fine

import panel as pn
import bokeh.models.widgets as bw
import panel.widgets as pw
from bokeh.models.widgets import PreText
from bokeh.layouts import column
from bokeh.plotting import curdoc

pn.extension()

txt = bw.PreText(text="")
input_box = pw.AutocompleteInput(restrict=False)
input_box.title = "Foo Bar"
input_box.value = "400"
input_box.completions = ["100001", "12344556", "3194567289", "209374209374"]

def update():
    txt.text = f"Autocomplete value is {input_box.value}"

input_box.param.watch(lambda new_val: update(), 'value')

col = pn.Column()
col.extend([input_box, txt])
col.servable()

It's still not clear to me why the CI on this PR failed and whether I need to make any modifications.

That's not caused by you, I'll have to adjust the CI setup.

Thanks again for this. I don't want to require bokeh 2.3 yet. So two favors, please add a version check which defines an entry in the AutocompleteInput ._rename which renames it to None when bokeh<2.3. Secondly please document the restrict keyword in the AutocompleteInput notebook in examples/reference/widgets.

Done!

Here just a check that the version selector does what it is supposed to do:

>>> from distutils.version import LooseVersion
>>> LooseVersion('2.3.0') < '2.3.0'
False
>>> LooseVersion('2.3.0dev1') < '2.3.0'
False
>>> LooseVersion('2.2.0') < '2.3.0'
True

Thanks!