DiagrammeR Graph not displayed when rendering in Quarto

[meersel]

When I run a R code chunk within a Quarto file (.qmd) the diagram graph is displayed.

When I render the Quarto file the graph is not displayed but the following error message is displayed.

TypeError: Assignment to constant variable.

See code of R chunk below:

a_graph <-
  create_graph() %>%
  add_node() %>%
  add_node() %>%
  add_edge(from = 1, to = 2)


render_graph(a_graph)

RStudio IDE (Windows) information:
RStudio 2023.12.1+402 "Ocean Storm"
Release (4da58325ffcff29d157d9264087d4b1ab27f7204, 2024-01-28) for windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2023.12.1+402 Chrome/116.0.5845.190 Electron/26.2.4 Safari/537.36

Quarto version info: 1.4.59

R version info: R-4.3.1

DiagrammeR package version: 1.0.11

[olivroy]

Hi,

Was this an issue with Quarto 1.3, and DiagrammeR 1.0.10?

[meersel]

I am using Quarto 1.4.59 (the latest release). and DiagrammeR 1.0.11

[jacciz]

I had that issue. That happens when the document is rendered is shown in the viewer/browser (i.e. http://localhost:7340/web/viewer.html). Try opening the rendered document from the actual folder and it should work!

[cderv]

It seems to happen with quarto preview.

Opening the doc with another tool for preview like https://github.com/TheWaWaR/simple-http-server works for me.

Opening with servr::httd() works.

So something conflict in the way quarto preview does run preview server for documents. 🤔

Viz.js 1.8.2 is what is used in this package. Not sure if an update could solve it.

Anyhow, as a workaround, you can preview the documentusing another tool to serve the document (or deploy somewhere)