Docsify latex in different positions are invalid

[Kwaiyu]

Describe the bug
Docsify latex in different positions of the same file are invalid

To Reproduce
Steps to reproduce the behavior:

1. add code

   <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.css"/>
   <script src="//cdn.jsdelivr.net/gh/upupming/docsify-katex@latest/dist/docsify-katex.js"></script>
   

2. white markdown article, use latex like this PythonTutorial.md

3. add latex to beginning of article, add below latex to middle of the article.

   Latex as:

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

Expected behavior
Latex in all positions are valid

Screenshots
beginning of article latex normal analysis：

markdown file:

show:

Latex doesn't seem to parse at the middle of the article:
markdown file:

show:

Desktop (please complete the following information):

• Browser version:Chrome 87.0.4280.66（正式版本） （64 位）
• docsify version :4.4.1
• docsify-katex version:1.4.3

Additional context
I try latex below code, or latex above code both show nomal.
But also it’s not work in this position：

Please help me check why it doesn't work.

[upupming]

@Kwaiyu Thanks for the feedback, I will take a look soon.

[upupming]

Hi @Kwaiyu, I have confirmed this bug which is caused by the design of docsify-katex is just a find-replace renderer for math equations, which may fail in a complex context. I will try to find another way to extend marked.js to know the context of the KaTeX, which may take some time~ Just a note, we should do something like this

[upupming]

Hi @Kwaiyu , I have inspected your markdown file, which contains ````` can not be recognized well by docsify-katex, you can delete that for a temp workaround:

A fix will come soon~

[Kwaiyu]

Hi @upupming,
Thank you very much for your help, "" means the code part in markdown, deleting "" will not be able to parse the code, how to make a decision? Hope docsify latex and markdown syntax are compatible.
Regards,
kwaiyu

[upupming]

Hope docsify latex and markdown syntax are compatible.

@Kwaiyu I will fix this soon, AKA make docsify-katex behaves the same as Markdown All in One

[Kwaiyu]

@upupming ok, As you said, delete "" can solve the issue, I can still use "```" to mark the code. I will try to avoid using "". Thanks.

[upupming]

@Kwaiyu I have reported an issue to the marked.js repo. It seems the only way to achieve this is to make a PR to mark.js repo and then write our own plugin for math tokenization & rendering.

It will take some time for this bug to be fixed, so please be patient.

[Kwaiyu]

@upupming Thanks for your help!

[Kwaiyu]

Closed