I'm well aware of how little I changed. If I were coding this in my style I'd also move the shorter key/value pair up above the function definition, or more li

I'm well aware of how little I changed. If I were coding this in my style I'd also move the shorter key/value pair up above the function definition, or more likely simply define the function as a local variable elsewhere. It's very rare that I declare function literals within an object literal. You're right that the comma was the real tragedy. I removed the braces to help illustrate how taking full advantage of the features of the language makes the code stronger. Strictly speaking removing the comma was all that was necessary.