Fragmented list don’t export animations in PowerPoint

[reparke]

(I posted this in Marp VSCode but was told it belonged here instead)

When I used the Fragmented unordered list and export to PPTX, the "fragmented" / animation part doesn't work--that is, all the items appear at once. The fragmented effect works fine in HTML, but not in PPTX
Markdown example:

Title
* item 1
* item 2

My system
OS: Windows 10 Pro version 1803 (build 17134.885)
VSCode: 1.37.1
Marp extension: 0.9.0

[yhatt]

Thank you for your helping to translate the issue from marp-team/marp-vscode#66 to marp-cli.

We have two approaches to realize:

• 🅰️ Add pre-rendered images of all steps provided by fragmented list as new slide pages. It's a realistic appraoch but the page index of exported slides may not match to real pages in Markdown.

• 🅱️ Add step images as slide animations. Most user would expect this behavior. However, @marp-team/pptx (based on PptxGenJS) is not supported the animation and PptxGenJS is not too. We also cannot expect the implementation of animation in future version of PptxGenJS.

And we have to support rendering images of all animation frames by fragmented list in either case.