For testing with ipywidgets >= 5.1
For a development installation (requires npm if you want to update js files)
$ git clone https://github.com/hainm/test_nglview_ipywidget5
$ cd test_nglview_ipywidget5
$ python setup.py install
If you want to update ./js/ folder, make sure to add --npm
$ python setup.py install --npm
jupyter notebook demo.ipynb