Add content classes

[PierreMarchand20]

Coming from remark.js, I used a lot content classes, which allowed to define and compose css style. I did not find any equivalent in marp (but I may be mistaking), apart from writing raw html/css directly in markdown (which is a bit cumbersome when it is just for locally changing words).

Typical use is changing the font for some text: center.alert.left-5.bottom-30.font130[**Thank you!**]would write the text "Thank you!" using all the css styles center, font130, etc.

[yhatt]

That is non standard syntax of Markdown. For compatibility with other Markdown processors, Marp team thinks using raw HTML elements, a part of CommonMark, is good habit rather than introducing the custom syntax.

If you still want that, it should be better to introduce as a plugin.

But currently, I also could not find out the markdown-it plugin or Marp plugin to add that syntax exactly same as remark.js. The most similar syntax is the combination with markdown-it-bracketed-spans and markdown-it-attrs.

[PierreMarchand20]

I understand, I think the issues with raw HTML elements in .md file are

• it is cumbersome to write all the nested <div class="...">...</div> by hand
• linter does not like it :-)

That being said, the first point could be easily tackled adding snippets/autocompletion in the Marp vscode extension. Actually, I just figured out how to use Emmet in markdown files, which would greatly simplifies it I hope.