Pluto: how to number equations in LaTeX mode

disberd · July 9, 2021, 1:39pm

@VivMendes
I have been playing a bit with the @tex macro that @fonsp posted a while ago on zulip and was able to recreate automatic equation numbering as well as referencing in other cells of the notebook.

You can find the example notebook here:

github.com

disberd/PlutoExtras.jl/blob/master/src/latex_equations.jl

module LaTeXEqModule

using HypertextLiteral

export texeq, eqref, initialize_eqref, @texeq_str

const js = HypertextLiteral.JavaScript

# LaTeX equation using KaTeX #
## Initialization Function ##
#=
KaTeX [supports](https://katex.org/docs/supported.html) automatic numbering of
*equation* environments.  While it does not support equation reference and
labelling, [this](https://github.com/KaTeX/KaTeX/issues/2003) hack on github
shows how to achieve the label functionality.

Unfortunately, since automatic numbering in KaTeX uses CSS counters, it is not
possible to access the value of the counter at a specific DOM element.  We then
create a function that loops through all possible katex equation and counts
them, putting the relevant number in the appropriate hyperlink innerText to

This file has been truncated. show original

Ad here is a gif of the basic functionality:
82074c75-ceef-4e94-ac72-7a42e4653976

If you don’t need the equation references as hyperlinks you can skip using the big cell with a lot of javascript code and just use the two function definitions eqref and texeq.

Unfortunately you still need to double escape every backslash for putting the text on the equation environment but that can probably be fixed when PR #1032 is merged into Pluto by using a string literal macro

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Pluto: how to number equations in LaTeX mode

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