Version 04 · Console lab
Open Developer Tools → Console. Edit app.js, save and reload this page. The source is the teaching program; this page does not execute any remote requests.
Expected output for the supplied version
-1 => Check the event data 0 => Full 1 => 1 places available 7 => 7 places available Available: 7
Array and object formatting varies between browsers. For version 05, inspect the All output too.