Markdown / Markdown Preview improvements

[nathansobo]

All Markdown issues

LSP

Investigate this, this may solve multiple other requests

• Markdown LSP support #5243

Syntax highlighting

• . breaks bold markup in Markdown files #5217
• _ breaks highlighting
• MDX extensions#203
• Syntax highlighting for markdown fenced code blocks #5761

Render / Embed

• Render bold text bold, italic text italic, etc.
• Document embedding via multibuffers (@Kethku's suggestion)
• Allow opening links from markdown files in the default browser #992
• Markdown link creation improvements #5087
• Render markdown in comments/doc comments #5313
• Markdown - Support GFM callouts (formerly github admonitions) #10022
• Mermaid diagram rendering in Markdown preview #10696
• Markdown Tables are Misaligned in Preview #11024
• Support images in Markdown preview #13246
• Footnote support in Markdown #13603
• markdown preview code block is not monospace #15379
• Markdown preview: list items should indent #18540
• Markdown preview: code blocks: more horizontal padding #18542
• Markdown preview: Copy button for source code blocks #19061
• Markdown code block font size is too large #19157

Autocomplete / Autoformatting

• Detect lists and automatically insert the appropriate item #5089
• Format Shorthand Markdown Tables #5382
• CMD + Click checkboxes (- [ ]) in MD to fill them #5226

Misc

• Markdown preview in browser window #4791
• Spell Checking #5305
• Custom markdown header color #14115
• Markdown outline and folding support #4924

[iamnbutler]

I'd love for us to detect checklists as well (- [ ]) and add a new one when making a new line.

[fdionisi]

Not sure if the following should be added here on in a separate bug ticket.

When adding italic styling using _ to the last word of a sentence on the last line of the editor, syntax highlight is not applied until you enter a new line below.

Kapture.2022-07-27.at.12.43.44.mp4

[srl295]

• should support backticks (`backticks`) also

(didn't seem to be exactly covered by the above.)

[bbkane]

Inline image rendering would make a HUGE impact on how I write Markdown (it's currently the main reason I use https://typora.io/ ) (see my blog for more ranting information about what I need to take notes)

[red-co]

Can we add support for id anchor jumps in Markdown, // If possible, allow this specific syntax to jump directly into the editor in any source code comment block.

Some editors allow setting ids or aliases for headers.

It may be implemented with html like <a id="anchor">name</a>, but this hack only works for page html, and editor inside jumps do not support it.