[TODO] Test with HTML widgets

[apreshill]

• [ ] Crosstalk
• [ ] DT
• [x] Leaflet (#50)
• [x] plotly (#74, #47)
• [x] highcharter (#74)
• [ ] reactable

I tagged all the issues I found related to this here: https://github.com/rstudio/revealjs/labels/widgets.

The solution here may be related to the more general problem of embedding elements.

[cderv]

Some of the examples are working fine but sometimes it could be conflict between JS libraries. (like #74)

I think this brings back the question of some tooling like widgetframe (https://cran.r-project.org/web/packages/widgetframe/) to isolate HTMLwidget from the main document. Maybe in documents like revealjs_presentation which heavily depend on another library this could be quite useful as the probability of conflicts could be high.

I'll add manual tests with different example to check that.

[cderv]

Test example for leaflet: 65b5604

[cderv]

Test example for plotly: 44a2037