This is something I started to think about the other day as I have been diving deeper into MVC. In it’s purest form, at least to what I understand, is that the whole idea of MVC is to have a separation between information handling (controller), information delivery method (model), and the information presentation (View). What this means is that the View itself should only be around to display or return information, but that’s it. Have a form? Great, here’s the information you need to fill out and I’ll send it on it’s way. And even with that idea, the View itself doesn’t really send anything. It just passes what it knows off to the model and it’s back in happy land. (The view gets nervous sometimes… performance anxiety) The whole system works well in actuallity, it does what is expected. There are no events simulated and possibly tangled. There’s no smoke and mirrors when it comes to the display and what the user is seeing. I want a grid of users? Here it is. I want to edit this user? Great! I’ll take you to the page that does that. Life is great and wonderful.
But wait, here comes jQuery, Json, and Asynchronous Calls. Now I can do crazy things with the view that I could never do before. Remember that grid of users? Well you don’t really have to go to another page to edit. Hell, just click this link and a form can appear to take in what you need to change. Even better, the grid itself will change and allow you to edit any row you want, and when you’re done the grid will come back all new an refreshed. What a crazy party this is now. Kind of sounds familiar right? Yeah WebForms. With these three helpers we’ve now cut out the middle man in the Model and passed the savings onto you. Essentially the whole idea has been chucked and jQuery has allowed us to invoke the same event model WebForms was chastised for. In fact, you could go to the logical end and have one page once again that controls everything. The View once again has the power much like it did in WebForms (provided you look at the Page and code behind being more like a View than separate entities). Isn’t that the whole thing we were trying to get away from?
I suppose you could make the argument that no one is putting a gun to your head to use jQuery for anything other that simple things like UI manipulation (date pickers, sliding controls, drag drop, ect) but that wouldn’t be the situation being argued here, now would it?