allow multiple theme on a page

[orkeilius]

allow multiple theme on a page

why

I could be useful to make theme that add custom layout, animation, feature... while using a "classic" theme

Example of a class to make a centered layout

section.center > * {
  margin-left:auto;
  margin-right: auto;
  text-align:center;
}
section.center > footer {
  margin: 0;
  text-align:left !important;
}

how

allow multiple element in theme
theme : default, my-layout

currently

I use a basic style tag in my slide. Maybe an @import could work

[yhatt]

In Marp (Marpit framework) theming system, the theme is always unique in a slide document.

Allowing multiple themes would lead to many race conditions, such as different slide sizes and CSS @import definitions that are globally defined beyond the scope of Marp slides. Therefore, we do not plan to support that.

[orkeilius]

You could just ignore Marp comment after the first theme. So that only the first theme apply rule.

Also, do you plan to support marp setting per item ?
I could be useful to:

• add class on element
• Tailwind styling on element
• set element specific option
• to delay element showing (like in list who show item one by one)

[yhatt]

The class for each slide page sections already can change by <!-- _class: xxx --> directive. For Markdown elements, you can use raw HTMLs or plug the suited markdown-it plugin to Marp engine, such as markdown-it-attrs.

[orkeilius]

I totally miss the fact that marp have plugins. Thanks for the response, I'm going to use that