Enhancement: Provide web debugging support

[dmurdoch]

The rgl package had an issue reported that I could only manage to replicate within a webshot() call. It was a problem in the rgl Javascript code, so I needed to run the browser debugger to diagnose and fix it. It took a while to figure out how to invoke the debugger, so I thought a nice enhancement would be to make this easier (e.g. a new argument to webshot() that made it do what I did).

Or, if this is too obscure, writing this issue will at least record the steps in case anyone else needs to do this.

Here are the details:

This location:

webshot2/R/webshot.R

Line 258 in 6cc8950

s$Page$navigate(url, wait_ = FALSE)

is where the browser is told to navigate to the page where it's taking a snapshot. If you run this command after that:

s$view()

it will open a browser window showing the browser debugger.

The browser window only stays open as long as the delay that was requested in the call to webshot(), so you should set delay = 300 or some other large number to give you enough time to make some debugging progress.