2013 02 05 magic function properties

    var f = function() { };
    f.foo = 'foo'; // sets f.foo to 'foo'

Functions are objects, so you can set properties on them after creation.

    f.name; // is ''
    f.name = 'foo';
    f.name; // is still ''

But not all the time.

    var f = function myFunction() { };
    f.name; // is 'myFunction'

Functions happen to have magic properties. One of them is the non-standard .name, which stores the function's first name and read-only.

— @tmcw