Hi Mauricio,
Since the flowlet run on the client as a one page application, the back button simply takes you to the previous page rather than the previous visible form. In theory it would be possible to overload the back button event to simulate the 'stepping to previous form behavior'. But for formlets in general it's not obvious what the meaning of clicking back should be.
Joel
Hi Joel,
In the concrete case of a multi-step form as the one in the MVC sample, the back button should take the user to the previous step. Every user expects that. Not complying with this is IMHO a show-stopper bug. Nielsen identified breaking the back button as one of the worst web mistakes 12 years ago.
Running as a one-page application is not reason enough to break the back button, you can use the URL fragment to maintain state, as explained here (site seems to be currently down).
So the original question stands, and I think it's very important to see how the back button can be restored for the flowlet in the sample app.
Cheers,
Mauricio
Hi Mauricio,
Undoubtedly, this is an important issue and as you point out there are various ways to deal with it. The short answer is no, flowlets at this point make no effort to remedy the back button problem automatically. One reason is that the granularity of being able to go back is unclear and that there are technical limits on what can be done in an all-client-side solution.
One might argue that going back to the previous page is the right thing to do. However, this gets slightly less appealing and more of a technical challenge if you have several flowlets on a page, each with its own sequence of formlets.
On a fundamental level, while current flowlets don't handle the back button problem seamlessly, nothing keeps the user to remedy this manually, say between each flowlet page (as expected by most users), or even within a given page on the formlet control level (to provide even more flexibility, most reasonable for dependent formlet pages).
So it's all about deciding what should be able to be reverted on a back button. It also has some technical limitations if you want to encode all state changes all on the client and/or in the URL - but again, posting back to the server between page transitions and fetching those on a back button can provide a quick and robust manual solution.
In either case, we are open to alternatives so feel free to suggest what's on your mind, and we will continue to integrate robust and proven techniques as we go along to enhance our flowlet support.
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Hi, WebSharper newbie here. Kudos to the team for this interesting framework!
I was playing with the ASP.NET MVC sample web app and noticed that the back button is broken in the flowlet. Is this a bug in the sample app or the flowlets feature itself?
Cheers,
Mauricio