Force JavaScript exception/error when reading an undefined object property?

Question

I\'m an experienced C++/Java programmer working in Javascript for the first time. I\'m using Chrome as the browser.

I\'ve created several Javascript classes with fie

Answer 1

Firefox has an option javascript.options.strict (in about:config). If you enable this, warnings will be logged to the console for many common mistakes, including reading an undefined property, using = instead of == in an if, etc.

(Of course, that's not to say such code is necessarily wrong.)