IPython javascript widgets in colaboratory?

[ceball]

Hi

I have a short IPython notebook with a simple widget that runs fine under IPython notebook 2.1.0, but which I can't get to work with colaboratory. I'm running the "classic web app" on my own computer i.e. python -m colaboratory, I launch chrome with --disable-web-security, and I visit http://127.0.0.1:8844 to use colaboratory.

The notebook contains the following three cells (the .ipynb file is at https://drive.google.com/file/d/0B2GEeTv36tvTb0FCRWU3eHFqWWM/view?usp=sharing):

from __future__ import print_function
from IPython.html import widgets
from IPython.utils.traitlets import Unicode

class DateWidget(widgets.DOMWidget):
    _view_name = Unicode('DatePickerView', sync=True)

from IPython.display import Javascript
Javascript("$.getScript('test.js');")

DateWidget()

And test.js is just:

require(["widgets/js/widget"], function(WidgetManager){

    var DatePickerView = IPython.DOMWidgetView.extend({
        render: function(){ this.$el.text('Hello World!'); },
    });

    WidgetManager.register_widget_view('DatePickerView', DatePickerView);
});

This works in IPython notebook. For testing in colaboratory, I put test.js in colaboratory/resources/colab/ and I changed the second cell's Javascript() call to Javascript("$.getScript('/colab/test.js');"). When I call DateWidget() I don't see any widget, and the browser console log says:

No such target registered:  WidgetModel comm.js:80
Available targets are:  Object {} 

I'm not familiar with IPython notebook's widgets, so I'm trying to puzzle my way backwards from this error message at the moment. I'd be grateful for any pointers!

Thanks Chris

[KesterTong]

currently coLaboratory doesn't support widgets. This is mainly because we were basing coLaboratory off a version of IPython before widgets were introduced. We have some long term plans for re-syncing coLaboratory with IPython/Jupyter master, but until then we probably won't be adding support for widgets.

[rgbkrk]

This version of colaboratory is no longer supported, please switch to https://colab.research.google.com.