Support reactive expressions in arguments and options about hvplot HOT 6 OPEN

Returning a Panel objects; eventually we do want to accepts reactive references and then apply them with .apply.opts().

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Taking the initial example, we can see the object returned is not a HoloViews element but a Panel object:

I think we weren't very happy with non-HoloViews objects returned by .hvplot() calls (there might be an issue on that topic). I also have some vague memory of us talking about deprecating some of that functionality, since it can be done with .interactive():

It seems to me this issue is part of the greater issue of figuring out what to do with .interactive() now param.rx exists that I put on hvPlot roadmap's for this year. Cc'ing @philippjfr since he may have some ideas 🙃

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Ok, noted.

I'm not sure how to undo it cleanly though.

Perhaps with starting to emit a deprecation warning for the current behavior, and add a parameter (maybe global) for users to opt in the new behavior.

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For completeness, note that .apply.opts() can also be used successfully here:

import hvplot.pandas, pandas as pd, panel as pn
df = pd.DataFrame([6,2,9], [1,2,3])
e = pn.widgets.IntSlider(value=2, start=1, end=10, name="e")
pn.Column(e, df.hvplot.line().apply.opts(line_width=e))

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Taking the initial example, we can see the object returned is not a HoloViews element but a Panel object:

This was an exceptionally bad decision on my part and should be undone. I'm not sure how to undo it cleanly though.

from hvplot.

should be undone

Returning a Panel object, or allowing .hvplot() to accept widgets/parameters?

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