Cannot advance slide in jupyter notebook converted to Reveal.js slides

Question

I am trying to convert my notebook, created with jupyter lab, to Reveal.js slides.

I am using this command:

jupyter nbconvert Initial-Data-Exploration.ipynb --to slides --post serve

taken from this Github issue.

However I am getting the same issue as the original reporter: I only see the first slide and cannot advance to subsequent slides.

In the browser console, I am seeing this error:

Which I assume refers to a custom.css file that I could use to optionally customize the appearance of the slides and not related to the functionality.

The only errors I see on the command-line are these:

WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 1.05ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.90ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.88ms WARNING:tornado.access:404 GET /style.min.css.map (127.0.0.1) 1.32ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.69ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.87ms WARNING:tornado.access:404 GET /style.min.css.map (127.0.0.1) 1.02ms WARNING:tornado.access:404 GET /favicon.ico (127.0.0.1) 0.93ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.82ms WARNING:tornado.access:404 GET /custom.css (127.0.0.1) 0.73ms WARNING:tornado.access:404 GET /style.min.css.map (127.0.0.1) 0.82ms

which I assume refer to the same issue as above and also won't impact functionality.

I'm new to using nbconvert and reveal.js so any help would be appreciated.

EDIT: this seems to only be a problem when using Jupyter Lab and does not appear when using regular jupyter notebooks.

Answer 1

I also had this issue. In Jupyter go to View → Show Right Sidebar and set the Slide Type for each slide.

The problem is when the "cell type" is undefined by default.