The anchor doesn't work if there's an “й” in it.

[Alexufo]

Describe the bug

The anchor doesn't work if there's an “й” in it.

Reproduction

Please test. "Движок авто" works fine, but "Настройки сессии" will not scroll down

[Движок авто](#движок-авто)
[Настройки сессии](#настройки-сессии)
<br>
<br>
<br>
<br> 300 times...

## Настройки сессии
## Движок авто

Expected behavior

works as other words

System Info

viteress 1.6.3

Additional context

No response

Validations

• Check if you're on the latest VitePress version.
• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[brc-dd]

Hmm, the anchor for heading is being normalized but the link isn't. Bit tricky to solve. A workaround is to specify normalized version - [Настройки сессии](#настроики-сессии) but it might appear as a typo and won't work properly with markdownlint/vscode. Another option is to adjust the slugify function so it behaves similar to your IDE:

// .vitepress/config.ts

import { defineConfig } from 'vitepress'

export default defineConfig({
  markdown: {
    anchor: {
      slugify: (s) => s.replace(/\s+/g, '-').toLowerCase()
    }
  }
})

markdownlint uses this function which used to be the one that github used 👀

      slugify: (s) =>
        s
          .toLowerCase()
          .replace(/[^\p{Letter}\p{Mark}\p{Number}\p{Connector_Punctuation}\- ]/gu, '')
          .replace(/ /gu, '-')

vscode uses this:

https://github.com/microsoft/vscode/blob/2b3cb533550639a43a144968b07576998a880718/extensions/markdown-language-features/notebook/index.ts#L406-L412

[userquin]

@brc-dd I use loadash-es/deburr to normalize search strings, your script is not working, run this in your devtools console (Chrome):

const data1 = 'движок-авто'
const data2 = 'настройки-сессии'
const deburr = await import('https://cdn.jsdelivr.net/npm/[email protected]/+esm').then(m => m.default?.deburr || m.deburr)
console.log(deburr(data1.normalize('NFD'))))
// движок-авто
console.log(deburr(data2.normalize('NFD')))
// настроики-сессии

[userquin]

On firefox you can go to here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/normalize, and replace Try it code with this one and run it:

const data1 = 'движок-авто'
const data2 = 'настройки-сессии'
import('https://cdn.jsdelivr.net/npm/[email protected]/+esm').then(m => m.default?.deburr || m.deburr).then((deburr) => {
  console.log(deburr(data1.normalize('NFD')))
  // движок-авто
  console.log(deburr(data2.normalize('NFD')))
  // настроики-сессии
})

[brc-dd]

No actually we need настройки-сессии there, to align with vscode's intellisense or github's preview.

This is what github generates: (which is similar to markdownlint's function)

VitePress currently generates настроики-сессии (same as what you wrote) using https://github.com/mdit-vue/mdit-vue/blob/main/packages/shared/src/slugify.ts. But it doesn't normalize the url fragments in links.