%%javascript cells executing unconditionally for a trusted notebook

Upon experimenting with %%javascript cells in notebooks, I was surprised to discover that they execute unconditionally upon loading a trusted notebook (even with F5).

This is a very pleasant surprise to me, please don't change this behavior!
It's just that I didn't expect it, based on my understanding of this documentation:
http://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/JavaScript%20Notebook%20Extensions.html

I am running Jupyter core 4.4.0

Start with the linked JavaScript Notebook Extensions documentation and compare its explanation with the reported behavior in Jupyter core 4.4.0. Done means the documentation clearly explains whether %%javascript cells execute when a trusted notebook loads, including the F5 case.

Written by the indexing model from the issue text.