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I'm never seen the `::: header` or `![Logo](https://...logo.png){width="200"}` kind of syntax before. Is this custom or Frankenstein solution? Or is there some kind of md-extended pattern for defining components that has been gaining steam or smthn? Markdown tooling is always confusing, since everyone has their own standard.


Admonitions are :::, allows you do to do things like this, if you have custom parser, if not, your admonitions can fail gracefully as plain text

:: gallery

![img](https://cats.com/orange-hair1.png) ![img](https://cats.com/orange-hair2.png) ![img](https://cats.com/orange-hair3.png)

::


https://github.com/remarkjs/remark-directive

https://talk.commonmark.org/t/generic-directives-plugins-syn...


Yep both are widely used. I forget which markdowns extensions they originated from. The Pandoc website probably has the details.


Aye, I've seen these both in kramdown and quarto.




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