Add support for GitLab Flavored Markdown (GLFM) in VS Code / WEB IDE

Problem to solve

When editing markdown files in the Web IDE it supports GitLab Flavored Markdown (GLFM) in the Preview Markdown view.
This is not the case, when I edit the same file locally with VS Code und use the Markdown preview.

The GitHub Markdown Preview extension pack covers many of the additional GitLab features. But they are designed for GitHub flavored Markdown and do not cover all the GitLab styles (e.g. [[_TOC_]] or the math syntax).

Proposal

Add functionality to this extension to change the VS Code markdown preview to match the rendering result from GitLab.com.

As you plan to replace the actual web IDE with VS Code for me it seems to be essential to support GitLab flavored Markdown in VS Code preview.

Links / references

• https://docs.gitlab.com/ee/user/markdown.html
• https://code.visualstudio.com/Docs/languages/markdown#_markdown-preview
• https://about.gitlab.com/blog/2022/05/23/the-future-of-the-gitlab-web-ide/
• Add toggle between legacy and new Web IDE
• gitlab#363608 (closed)