LaTeX support. about notable HOT 32 CLOSED

Would also love to see this!

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@umgupta that's what I realised, but sinde I use the executable and don't build from source, I will need a new release containing this commit.

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Right now you have to use \( \) for inline rendering. That is default setting. $$ $$ and \[ \] work for normal math.

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@nc-dtan I've improved the tutorial about KaTeX by using something similar to your provided code: https://github.com/fabiospampinato/notable/blob/master/resources/tutorial/notes/05%20-%20Notes.md/#katex

Thank you.

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It seems there's an extension for showdown (the markdown renderer we are using) already: https://github.com/obedm503/showdown-katex

Support for this should be easy, thanks for the suggestion!

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Hi! I tried to implement this. However, showdown-katex as published on npm registry is old (0.0.5) and doesn't work.

I think (haven't tested) the newer version on the github repo works and can be used. Do you have any policy on how to "copy" this repo into the code as it can't be put into node-modules?

I can also just look at the code and copy the relevant code as an extension.

LMK

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@umgupta Actually you can install packages with NPM from a git repo, look here for instance, would that be enough?

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@fabiospampinato Thanks for the suggestion! I found https://www.npmjs.com/package/showdown-katex-studdown which is v0.4.0 of the same package. However, the rendering is off (see https://imgur.com/dpMMIOT)

The corresponding markdown text is

# Python Notes

`__all__` :


$$x= \frac{-b\pm\sqrt{ b^2-4ac }} {2a}$$

$$a=a+b$$

In particular, it tried to render twice, first with "$$" stripped and later it tries to render latex but fails.

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Would like to second this request. In addition to direct access to the .md files for version control, encryption, etc., this would make Notable a great option for laboratory notebooks.

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It is fairly easy to manually call KaTeX rendering, see https://github.com/will-hart/markdown-server/blob/master/templates/app.hbs#L96 for an example.

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@will-hart Thanks, I was thinking to call katex directly too. Will do :). Thanks!

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Thank you @umgupta for implementing this!

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Hi all, is there an example on how to use this? Or maybe the release I got is just not including this (I got the release for windows).
I tried writing this without any luck:

\\[ a^2 + b^2 = c^2 \\]

$$ a^2 + b^2 = c^2 $$

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That seems to exactly be the case. Here are the commits not in the most recent version v1.0.1.

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There seems to be typo in config.ts#L47, delimilters instead of delimiters. I wasn't able to test it yet but assume that the default config will be used instead.

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@nc-dtan You don't have the updated version, hence it won't work as of now. Use master branch to use this feature.

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@fabiospampinato as @tilmanginzel pointed out, there is a typo in https://github.com/umgupta/notable/blob/e05b6e90ea8b0917e7ac9e350d9ccd469b139e10/src/common/config.ts#L47 where it should be delimiters instead of delimilters.

Correcting this type gives the expected result.

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@joueurh this is fixed in the master branch.

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Would it be possible to have $...$ as a default delimiter for inline latex? See: https://stackoverflow.com/questions/27375252/how-can-i-render-all-inline-formulas-in-with-katex

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@fabiospampinato I think @mjedmonds has a fair request. Do you have a place where people can configure "preferences"?

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@umgupta not yet, but I hope to release something about this in the next couple of releases.

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Is is really fixed now? I found that in the master branch it's still delimilters... @fabiospampinato

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@mjedmonds you can achieve that if you modified delimilters to delimiters, and add a line right below the first delimiter setting, as:

katex: {
    throwOnError: true,
    displayMode: false,
    errorColor: '#f44336',
    delimiters: [
      { left: '¨D¨D', right: '¨D¨D', display: true }, // showdown converts `$$` to `¨D¨D`
      { left: '$', right: '$', display: false },
      { left: '\\(', right: '\\)', display: false },
      { left: '\\[', right: '\\]', display: true },
      { left: '~', right: '~', display: false, asciimath: true },
      { left: '&&', right: '&&', display: true, asciimath: true }
    ]
  }

in src/common/config.ts

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@joueurh yes, sorry I forgot to push the relevant commit.

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Thank you so much! This app is just amazingly useful!

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@fabiospampinato, do you know when you will make the next release?

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@nc-dtan I think V1.1 is already out which has the needed changes.

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@umgupta that is true. Works now :)
How does inline math work?

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Just in case someone is as slow as me, here are some examples:

# Playing with math

\\[ a^2 + b^2 = c^2 \\]

$$  a^2 + b^2 = c^2  $$

Here is som inline math: \\( a^2 + b^2 = 25 \\). Looks nice

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I would like inline LaTeX support with $ ... $.

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@InnovativeInventor this is implemented in the master branch.

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Thanks so much for this! I got inline and display formulas working in the master branch, but KaTeX seems to have spacing issues when rendering:

From the KaTeX homepage:

From master branch:

A few things:

• The limits on the integral are slightly too high in Notable as compared to default KaTeX
• There is no spacing around the = sign, between the function f and the exponential, and the \, between the exponential the d\xi seems to have been ignored completely.
• The \hat that's supposed to go over just f goes over both f and the opening parenthesis.

Maybe something to do with configuration settings passed to KaTeX when it's first loaded?

Code used:

# Maths

Notable has KaTeX support. This supports both inline (\\(3x = 5\\)) and display equations:

\\[f(x) = \int_{-\infty}^\infty \hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi\\]

Inline expressions: \\( e = mc^2 \\), are supported too.

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