No syntax highlighting for fresh install in Jupyter Notebook

[awa5114]

Describe the bug

I installed the .NET interactive kernel as described by this page.. The installation was successful and I can run .NET code no problem, but it looks like the syntax highlighting is missing:

Please complete the following:

Which version of .NET Interactive are you using? (In a notebook, run the #!about magic command. ):

• OS
  • [ ] Windows 11
  • [x] Windows 10
  • [ ] macOS
  • [ ] Linux (Please specify distro)
  • [ ] iOS
  • [ ] Android
• Browser
  • [x] Chrome
  • [ ] Edge
  • [ ] Firefox
  • [ ] Safari
• Frontend
  • [x] Jupyter Notebook
  • [ ] Jupyter Lab
  • [ ] nteract
  • [ ] Visual Studio Code
  • [ ] Visual Studio Code Insiders
  • [ ] Visual Studio
  • [ ] Other (please specify)

Screenshots

[jonsequitur]

Syntax highlighting in Jupyter is not provided or affected by the .NET Interactive kernel, so I'm marking this as external. This must be related to the Jupyter install itself.

[awa5114]

@jonsequitur But it should work right? Provided I fix the Jupyter installation?

[jonsequitur]

Yes, there's usually basic syntax highlighting for C# in Jupyter Notebook and Jupyter Lab.

[awa5114]

Could it be an issue that I'm working with dotnet --version 7.0.102?

[jonsequitur]

No, Jupyter doesn't use .NET.

[awa5114]

Ok. I just posted in https://discourse.jupyter.org/t/net-interactive-syntax-highlighting-issues/18431. Maybe someone will be able to help there.

[jonsequitur]

Are you seeing this with brand new notebooks created in Jupyter?

[awa5114]

Yes, brand new notebooks in a fresh conda environment, with a fresh install of .NET interactive. But the behavior is a bit more subtle than I had initially thought. I might get syntax highlighting on some cells, but not on others. If I refresh my browser using Ctrl + R the highlighting reappears on those other cells.

I can't yet pinpoint/predict all the situations in which the highlighting disappears. But I have noticed that it disappears quite reliably from the topmost cell when I split cells using Ctrl+Shift+-. There may be other situations as well.

As far as I can tell the highlighting for Python kernels is just fine and does not exhibit this behavior. Only the .NET kernels are problematic. So I don't think that this is a Jupyter issue. Perhaps someone could try reproducing this?

[awa5114]

@jonsequitur Any updates on this? It really makes the jupyter .NET scripting experience less than ideal:

Only after I refresh the browser does some syntax highlighting appear:

And even then objects from the System namespace still have no highlighting

[ibobak]

Now is 2024-03-06, I have exactly the same problem as described above. Still not solved.

[XiaomoWu]

Interestingly, I can have R syntax highlighted correctly but couldn't do that for Python (pylance).