Jupyter-book: Standalone pages don't show Plotly figures

[mcmwright]

Describe the bug

Since upgrading jupyter-book the figures produced by Plotly no longer appear when building standalone pages.

To Reproduce

Steps to reproduce the behavior:

1. Create a jupyter notebook mypage.ipynb with a Plotly figure
2. Run jb build path/to/mypage.ipynb
3. View the resulting html file
4. See no figure

Expected behavior

Plotly figures worked with my previous version of jupyter-book, sorry I don't remember the version number but it used jb page ... rather than jb build ... for standalone pages.

Environment

• Python Version [e.g. 3.7.1]: 3.7.7
• Package versions or output of jupyter-book --version: 0.8.2
• Operating System: Windows 10

Additional context

I assume this is because jupyterbooks with Plotly content now need to load require.js in `_config.yml, but I don't see how to do that with a standalone page.

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[chrisjsewell]

Heya, thanks for the report, i did add a mention of how to add this in the documentation https://jupyterbook.org/interactive/interactive.html#plotly
I thought this should still work for standalone, i.e. it should still read the config, is that not case?

[mcmwright]

Hi, thanks for responding so quickly (love jupyterbook btw)

I'd seen that but hadn't realised you could have a _config.yml with a standalone page, since I hadn't had one before. But I just added one and it works fine now. Thanks again. and sorry to bother you.

[choldgraf]

Hmmm this makes me think we should make that message clearer, so folks know that they can do all the same stuff w/ _config.yml. Do you agree @mcmwright ?

[mcmwright]

Agreed

[mcmwright]

BTW, I just built a standalone page from a notebook with a Julia kernel, using the Plotly backend to Plots.jl, and it the resulting figure displays in the html output without the need for a config file.

[chrisjsewell]

Awesome 😀