R Under development (unstable) (2025-12-16 r89184 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> message("*** dataURI ...")
*** dataURI ...
> 
> R.devices::devOptions("*", field="dataURI")
> uri <- R.devices::toPNG("foo", tags=c("a", "b"), aspectRatio=0.7, {
+   plot(1:10)
+ })
> str(uri)
 chr "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAeAAAAFQCAMAAABQwF3SAAAAclBMVEUAAAAAADoAAGYAOjoAOmYAOpAAZrY6AAA6A"| __truncated__
> 
> 
> R.devices::devOptions("*", field="pathname")
> png <- R.devices::toPNG("foo", tags=c("a", "b"), aspectRatio=0.7, {
+   plot(1:10)
+ }, force=FALSE)
> uri2 <- R.devices::asDataURI(png)
> str(uri2)
 chr "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAeAAAAFQCAMAAABQwF3SAAAAclBMVEUAAAAAADoAAGYAOjoAOmYAOpAAZrY6AAA6A"| __truncated__
> stopifnot(identical(uri2, uri))
> 
> message("*** dataURI ... DONE")
*** dataURI ... DONE
> 
> proc.time()
   user  system elapsed 
   0.43    0.20    0.82