Ipywidgets: widget do not display (7.0.0a3)

[npetitclerc]

The simplest test:
from ipywidgets import *
IntSlider()
returns:

A Jupyter Widget

This is running the notebook from a remote Ubuntu server.
Here's the library version used:

ipywidgets 7.0.0a3
IPython 5.4.1
Python 2.7.6 (default, Oct 26 2016, 20:30:19)
[GCC 4.8.4]
jupyter 1.0.0

It works fine locally on a Mac, with exact same library version but Python version is 2.7.11.

I did run:

jupyter nbextension enable --py widgetsnbextension

But that didn't help. Any idea what could be wrong? I'm running out of ideas. I do need ipywidgets version 7 and above, because I want to use 'SelectionRangeSlider'.
Thanks.

[jasongrout]

Are there any errors in the Chrome console?

[npetitclerc]

Well, well... you are a magician! I just open the console, refresh and it suddenly works...
I feel like I was just missing the "jupyter nbextension enable --py widgetsnbextension" command, because that's what fixed it for me locally.
But after I did that remotely (on the server) it didn't work, I tried to restart the jupyter notebook, the kernel, refreshed countless time before but to no avail... I wonder if opening the console has something to do with it or not?
Thanks!

[jasongrout]

Opening the console can make the browser cache refresh. It sounds like that might have been the problem - your browser was using its local copy of the code, rather than getting it again from the server.

See https://stackoverflow.com/a/7000899

[npetitclerc]

Makes sense, thanks.