jorendb is a simple command-line debugger for shell-js programs. It is intended as a demo of the Debugger object (as there are no shell js programs to speak of).
To run it:
$JS -d path/to/this/file/jorendb.js
To run some JS code under it, try:
(jorendb) print load("my-script-to-debug.js")
Execution will stop at debugger statements and you'll get a jorendb prompt.