Well, I did discover one very helpful thing in my search for "console.log( )"
This dictionary really helps you to translate the AppleScript commands you know and love into the corresponding JXA syntax. To make it easy to search and read, I copied it all and pasted into an Evernote Note.
For any scripting newbees, to see this,
goto ***Script Editor > File > Open Dictionary...***, and then choose the "ScriptingAdditions.osax"
To use any of these commands, you will need an app reference, like this:
var app = Application.currentApplication()
app.includeStandardAdditions = true