Make the PDF print work for MathJax math

[choldgraf]

Currently, we use a library called PrintJS to handle
printing of just the notebook content (when you click the "print -> PDF" buttons).

However, a drawback of this approach is that MathJax mathematics don't quite display properly. Here's an example of how it looks:

live page:

https://jupyter.org/jupyter-book/features/markdown.html

Original math:

printed math:

Here are a few problems:

• We don't get the same math fonts that are normally displayed. (I believe because MathJax dynamically loads them, so this defaults to system fonts)
• The mathematics are duplicated for some reason fixed by fixing double math printing #286 !

We should fix these!

[mneira10]

Hi! I've been trying to get the new download "download"->"pdf" to work but it doesn't seem to come as a default when you create a new notebook or when you upgrade a previous notebook version.

I can't seem to find the setting for enabling it either. Is there a straight forward way to get this working?

Thanks in advance!

[choldgraf]

This only works on the master branch right now, can you try installing jupyter book from there and trying?

[choldgraf]

I just added a quick note about this to the main page of the docs:

https://jupyter.org/jupyter-book/intro#Installation

[choldgraf]

I think that we can say Math rendering works OK now on print - the fonts aren't quite right, but the math actually renders pretty nicely so I'm gonna close this and we can see if folks aren't happy with the result in subsequent issues