Raw content for a cell (slide_type: slide, raw_mimetype: slides) ignored

[alexbarcelo]

I was trying to include some custom slides in a notebook with the intention of exporting that to a Reveal.js presentation.

I am using nbconvert==7.16.6 and jupyterlab==4.4.9

The cell contains

<h1>This is something</h1>

I checked the generated html and has a <section><section></section></section> and no <h1> to be found in the slide.

I tried to tweak metadata, but got nowhere near my goal. The metadata that I expected to work (and gives no content on the

slide) is the following:

{
    "editable": true,
    "slideshow": {
        "slide_type": "slide"
    },
    "tags": [],
    "raw_mimetype": "slides"
}

The content for the raw cell is ignored in most setups, or escaped in some settings (which I forgot, sorry, but still, I want to use raw there, so still, having some escaped or <pre> content is not what I am trying to achieve).

---

(I might have an XY problem so let me be transparent: I am trying to have a custom slide with a different background and some custom images, set up with reveal.js goodies, but the rest of the presentation should be default nbconvert-reveal.js conversion, which is perfect for my needs. I don't want custom CSS nor custom templates on the whole presentation, just some specific hand-crafted slides sparingly used. Raw cells seemed to be a good way to achieve that).