Confused by extension example in README

[robogeek]

As a reader of Markdown-IT-KaTeX documentation, I want to be enlightened and informed.

In the section Katex extension, this code snippet leaves me confused.

import MarkdownIt from 'markdown-it'
import katex from 'katex'
import 'katex/contrib/mhchem'
import 'katex/contrib/copy-tex'
const md = new MarkdownIt()
katexPlugin(md, {
    katex,
})

From where does the reader derive katexPlugin?

This is the only place that katexPlugin is mentioned.

[Romaxx]

this works for me:

import MarkdownIt from 'markdown-it'
import katex from 'katex'
import 'katex/contrib/mhchem'
import 'katex/contrib/copy-tex'
const md = new MarkdownIt()

md.use(mk,{"katex":katex});

[robogeek]

Yes, I have code like that in my application currently.

But - My goal is getting the maintainer to update the documentation one way or another because this katexPlugin thing simply doesn't make sense.