Notebook: ENH: Markdown task list management

[VelizarVESSELINOV]

Task list it is nice to have as markdown enhancement:
https://github.com/blog/1825-task-lists-in-all-markdown-documents

[gnestor]

@VelizarVESSELINOV notebook uses marked library to render Markdown. It looks like there is a PR to add task list support to marked but it hasn't been merged yet. I suggest making some noise there. Once merged, come back here and we will make sure that we're using a version of marked that supports it.

[DawnMe]

Is this still in progress or was it merged yet?

[takluyver]

It looks like the marked PR didn't get finished yet: https://github.com/markedjs/marked/pull/587

[Legor]

For what it's worth, you can use HTML checkboxes

# Tasks
<input type="checkbox"> Eat
<input type="checkbox"> Sleep
<input type="checkbox"> Go Fishin

[30Wedge]

HTML checkboxes do the job for me,
but they don't retain their state unless you tell them to

<input type="checkbox" disabled> Eat
<input type="checkbox" disabled> Sleep
<input type="checkbox" disabled checked> Go Fishin

I like typing the gfm syntax better :)
so I'll go make some noise at marked

[30Wedge]

@gnestor
One of the marked devs said gfm tasklists were put in with marked 0.4.0
Looks like Jupyter still uses 0.3.0
https://github.com/jupyter/notebook/blob/56e08333ba9014c97a5fffcb70e0d479bae583af/bower.json#L16

[gnestor]

@30Wedge Excellent! I just submitted a PR to upgrade marked. I tested and it works, so hopefully this doesn't cause any regressions 👍