HTML inline style not shown in trusted notebook's markdown cell

[ghost]

Reproduce

• Open jupyterlab v3.2.3, create a new notebook and add a markdown cell:

<span style="font-size:42px">Irrelavant text.</span>

• The style does not apply
  https://stackoverflow.com/questions/68815487/html-inline-style-not-applying-in-jupyter-notebook-cells-anymore

Expected behavior

html should be rendered correctly just like in latest jupyter notebook v6.4.5

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[krassowski]

Thank you for reporting, this is indeed a regression. It worked well in version 3.2.1 and stopped working in 3.2.2. We need to start testing rendering of styled elements in Markdown in the visual regression testing.

I could not narrow it down to any of the PR backports, and I do not see it it on the master either. This is odd.

[meeseeksmachine]

This issue has been mentioned on Jupyter Community Forum. There might be relevant details there:

https://discourse.jupyter.org/t/style-attributes-in-markdown-cells/11761/2

[drewyoungren]

The same effect can be seen in the regular markdown previewer starting with 3.2.2 as well.

[krassowski]

This could be because of an upstream bug in sanitize-html: apostrophecms/sanitize-html#510

[krassowski]

That bug was already fixed in sanitize-html 2.5.3 by removing klona. Now, we did not have any update of sanitize-html recently but an update of klona broke this for us, so we need to pin klona to 2.0.4 or upgrade sanitize-html to 2.5.3. This klona version update happened in the 3.2.2 release indeed.