shinyDebuggingPanel for developing and debugging shiny apps

The package shinyDebuggingPanel has been updated to version 0.3,
with a better interface and line counters to recall previous commands.
To check it out,


Put a shinyDebuggingPanel into your app (straight shiny or Rmarkdown shiny).
You can then type some code into the box, either R or JS,
and execute it while the app is running.
(Deployment of an app on seems to prevent a bad actor from
abusing it... or at least they make trouble-making exploitation difficult.)

In developing new apps, I'd be lost without this thing.