HTML comments shouldn't render in mardkown cells

[fperez]

Describe the bug

context
When I type an html comment in markdown. Consider a cell with this content:

A **repository**: a group of *linked* commits

<!-- offline: 
![](files/images/threecommits.png)

<img src="https://raw.github.com/fperez/reprosw/master/fig/threecommits.png" >
-->

expectation
I expected it not to render the comment, and show only this:

bug
But instead it renders as:

problem
This is a problem b/c we often use comments to temporarily elide parts of a markdown cell or provide extra info not meant to be rendered.

Reproduce the bug

See above - happens with 0.1.3

Edit

Fixed accidentally incorrect screenie.

[mcauthorn]

In the event it helps: I've run into a version of the same bug. I had a markdown cell with the following HTML inside of it to render a resized image, which worked before installation of jupyterlab-mystjs:

<div>
    <img src="attachment:61feef8d-4746-446a-bfbd-191d469fbcdc.png" width="250"/>
</div>

After installation, the raw HTML is rendering instead of the (expected) image:

[rowanc1]

Thanks @mcauthorn and @fperez for the feedback, we will aim to get this fixed up soon, I think we somehow need to enable the html parts:

@fwkoch I have put together a sandbox example here html-comments/images it does looks like they do get parsed to html, but I think we aren't taking them the rest of the way?

[rowanc1]

Hi @fperez and @mcauthorn -- there is a new version v0.1.4 that provides better support for HTML parsing. It does catch the comments, and those are now no longer rendered (thank you @fwkoch!).

There is also a new feature that you can partially disable the full-renderer, and opt instead to open a MyST and a traditional version of the same notebook through the UI. This will require you to explicitly disable the "plugin" part, this will enable the other renderer -- there is more info in the readme!

The other HTML issues I am going to track in jupyter-book/jupyterlab-myst#64 (e.g. @mcauthorn the width isn't preserved).