Custom input to MultiChoice widget

[fmfreeze]

The MultiChoice Widget allows to enter values which are predefined in options argument.

Is it possible to allow also custom values as input (and ideally add it to the options list)?
(Without deepdiving into the underlying bokeh/param models and/or going crazy with javascript)

[ahuang11]

I’d also like this feature, maybe you can submit a feature request.

Besides that, a workaround I used is having a separate TextInput to update the options list