admonitions and classes

[parmentelat]

Description

I am writing notebooks using MyST I am operating under the assumption that jlab and jbook should behave identically; is that a fair assumption ?

specifically I am trying to style admonitions a little further and have gone this way:

• create a style.css file stored under _static
• create a style.html that is kept in sync with style.css except it has a wrapping <style> tag
• load style.html from the notebook
• the css defines this

  .custom {
    background-color: rgb(251, 231, 234) !important;
    font-size: x-small;
  }

with that in place in my notebook I can create an admonition like so

      ````{admonition} using the custom class
      :class: seealso custom

      some minor comment that should show up with a smaller font
      ````

that renders under jbook as expected, i.e. like this (I have added another one without the custom class for comparison

however the same code produces 2 similarly-looking chunks when rendered under jlab

so at this point I wonder:

• whether again it's a fair assumption on my end that both jlab and jbook should produce similar renderings
• and if so how to achieve that in the specific case described above

additional notes

I am aware that loading styles from _static is not a feature of jlab implicitly, and so I have made sure that was loaded in my jlab browser and for extra safety I have inspected the resulting html in jlab to make sure the custom class did not make it there, as opposed to the html output of jbook