Markdown Preview is not correctly rendering

[Mosiwi]

The Markdown Preview is not correctly rendering the MyST enhancements.
The following enhanced markdown is ignored and only the content is rendered as plain text.

``` {tip} this is a MyST tip that fails! ```

and

``` {note} this is a MyST tip that fails! ```

The MyST-Markdown extension is enabled since highlighting, intellisense, etc works on the enhanced MyST. However it seems that the enhanced Preview part is either not working or not activated. None of the enhanced MyST markup is previewing as expected.

Desktop:
Windows 11,
VSCodeUserSetup-x64-1.83.1
MyST-Markdown 2.0.0

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[Mosiwi]

Screenshot of Edit and Preview panes in VSCode:

[FernandoBasso]

It is working fine on my side on Arch Linux with VS Code 1.88.0 and all extensions up to date:

[iso2013]

It also works on my machine; maybe you need to rename the file to end in .myst.md for it to enable?

[adam-grant-hendry]

The op states the problem is in Windows 11, not Arch Linux. I have the same issue on Windows 10. Your test suite in your ci.yml only tests on Ubuntu.

[adam-grant-hendry]

Removing alternative extensions one-by-one, the culprit for me seemed to be by having both of the following extensions enabled:

• Markdown Preview Enhanced
• MyST-Markdown

Disabling Markdown Preview Enhanced seems to make the problem go away.

Caveats:

1. You may no longer have a button to render the markdown. Instead, you might have to resort to using ctrl+shift+v. (Reloading the developer window seemed to fix that for me).
2. If you use the code fences syntax (:::) for your admonitions rather than backticks (```), you need to enable code_fences in your `settings.json`

"myst.preview.extensions": [
    "dollarmath",
    "colon_fence"
  ]

3. Also be sure you don't have any other extensions enabled that might make the output look "odd" (e.g. Dark GitHub Markdown Preview)