I am using jupyterlab-myst, a really cool extension.
The MyST documentation on Topography mentions several extensions such as "attrs_block", "attrs_inline", "tasklist", "deflist", and "fieldlist". I believe those are MyST extensions, not JupyterLab extensions.
I copied the markdown text from the examples in Topography into my jupyter notebook and got jupyterlab-myst to render them. The examples do not work in the notebook like they do in the MyST documentation page, except for the Definition List example.
The MyST documentation page refers to a configuration file called "conf.py". I believe that applies to the Jupyter Book tool, not JupyterLab. How can I install / activate / enable / configure / whatever to get MyST extensions to work in JupyterLab?
Although this question is tagged with "myst", I am asking about jupyterlab-myst, not myst.
jupyterlab-myst developer here. You'll get better support opening issues in our GitHub repo in future!
jupyterlab-myst is separate from the Sphinx myst-parser project that feeds into jupyter-book. The common element is the MyST syntax, but even that has extensions that aren't supported everywhere just yet; we're standardising things and building out our JS stack as I write this reply!
Steve's reply refers to our Sphinx stack, but you're asking about our JS stack (via our JupyterLab extension). Right now, we don't have any customisation options; those are planned, but we're initially just getting things off the ground.