The ch 2, p 89 label magnet exercise solution seems incorrect. In fact, I think there is no correct solution. The arrow from the showUsernameStatus() method to the registration form is labeled, according to the solution, as "When the user leaves a field, an event event function creates a request object." The action of the showUsernameStatus has nothing to do with creating a request. This label would be better applied to the box pointing to the 'request = createRequest()" box, except that box already has a suitable label, "The request object has been created, ...".
Also, the statement "At this stage, data is downloading to the request object, but it's not quite ready to be used yet.", I think 'response' should replace 'request'.
Is there an errata for this book? I don't see any.












