Add + as fragmented list item (without bullets)

[ludos1978]

I wanted the + to function as fragmented list item. But it should be differently styleable. So this script elements should help you to

add to engine

// ---
// create fragmented list for + list items
// ---
const fragmentedListMarkupsPlus = ['+']

function _fragment_plus(md) {
  // Fragmented list
  md.core.ruler.after('marpit_directives_parse', 'marpit_fragment', (state) => {
    if (state.inlineMode) return
 
    for (const token of state.tokens) {
      if (
        token.type === 'list_item_open' &&
        fragmentedListMarkupsPlus.includes(token.markup)
      ) {
        token.meta = token.meta || {}
        token.meta.marpitFragment = true

        token.attrSet('style', 'marpit-fragments-plus')
      }
    }
  })
 
  // Add data-marpit-fragment(s) attributes to token
  md.core.ruler.after('marpit_fragment', 'marpit_apply_fragment', (state) => {
    if (state.inlineMode) return

    const fragments = { slide: undefined, count: 0 }

    for (const token of state.tokens) {
      if (token.meta && token.meta.marpitSlideElement === 1) {
        fragments.slide = token
        fragments.count = 0
      } else if (token.meta && token.meta.marpitSlideElement === -1) {
        if (fragments.slide && fragments.count > 0) {
          fragments.slide.attrSet('data-marpit-fragments', fragments.count)
        }
      } else if (token.meta && token.meta.marpitFragment) {
        fragments.count += 1
 
        token.meta.marpitFragment = fragments.count
        token.attrSet('data-marpit-fragment', fragments.count)
      }
    }
  })
}
// ---

module.exports = ({marp}) =>
  marp.use(_fragment_plus);

add to your css

ul:has([style*="marpit-fragments-plus"]) {
	margin-block-end: 0;
    padding-inline-start: 0;
}

/* for + list items */
[style*="marpit-fragments-plus"] {
	list-style-type: none
}

maybe it's helpful for somebody else.