Menu View → Table of Contents should toggle

[parmentelat]

Description

not sure whether it's a bug or a usability issue, but:

• clicking once in the menu View → Table of Contents does show the TOC
• but clicking a second time does not hide the TOC

and btw same goes for View → Debugger Panel

Reproduce

use the menu entry twice

Expected behavior

I'd expect these 2 functions to behave as togglers, just like how the Show Header thing behaves;
otherwise newby users can only regain their real estate by reloading the page

Context

• Operating System and version: seen on macos and linux
• Browser and version: chrome 118

• Jupyter Notebook version:

jupyter --version
Selected Jupyter core packages...
IPython          : 8.17.2
ipykernel        : 6.26.0
ipywidgets       : not installed
jupyter_client   : 8.5.0
jupyter_core     : 5.5.0
jupyter_server   : 2.9.1
jupyterlab       : 4.0.7
nbclient         : 0.8.0
nbconvert        : 7.10.0
nbformat         : 5.9.2
notebook         : 7.0.6
qtconsole        : not installed
traitlets        : 5.13.0

no output in the browser console

[parmentelat]

PS: i just realized - a couple hours later - that the TOC pane has a small closing cross in the upper right corner
not very conspicuous, I must say
I'd rather if the menu acted as a toggle, just like Show Header does
but maybe that's good enough like that...

[RRosio]

Thank you @parmentelat for opening this issue. After inspecting the file browser option from the view menu and noting that it behaves as you suggest (toggle open/close). Leaving this as a bug! If you would like to contribute to this, please feel free to do so!

[cccindyyyl]

Hi @RRosio ! I have some experience with front-end development, and I have successfully reproduced the bug on my end. Would it be possible for me to work on this issue? Thanks!

[RRosio]

Hi @cccindyyyl! Yes, there is no need to ask, please feel free to work on this or any issue that you would like to contribute!

[cccindyyyl]

@RRosio Hi! We submitted a pull request #7178 that fixes the issue here.