JS file from /inst/js/ package directoryThis is triggered from the server to execute on the client
rather than triggered directly on the client.
Unlike include_js_files which includes JavaScript functions,
the run_js actually executes JavaScript functions.
run_js_files(files)NULL, invisibly.
(character) vector of filenames.
system.file should not be used to access files in other packages, it does
not work with devtools. Therefore, we redefine this method in each package
as needed. Thus, we do not export this method.