I've recently started writing my first Jupyter Lab Extension. I'm using TypeScript cookiecutter with server extension inside Conda environment.

My first task is simply to display HTML report in a seperate widget. However, I cannot get even to that point because of the fact that the report uses JavaScript for plots and toolbox functions.

When I create a new notebook and write some Python code to display report, i.e.

import IPython
IPython.display.IFrame('./report.html', '100%', 600)

everything works fine.

But when I try to click on this HTML report and see it as a seperate tab inside Jupyter Lab, it keeps saying:

Jupyter server requires javascript. Please enable it to proceed

And when I run my widget extension, it says the same thing. That's why I can't move on with my project.

Things that I tried and didn't work:

• Create new Conda environment,
• Install another web browser,
• Install an older version of NodeJS.

There are not many articles about this problem and also JupyterLab extensions developing itself - that's why I'm struggling a lot with this issue..