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In previous chapters, we've gone into detail about the API we're going to be communicating with. There's no denying that it's one of the key parts of any application design; in fact many projects can live or die based on the quality of the API they're integrating with, but we've discussed this in the past two chapters and we've still got a lot to cover. From here on, we're generally going to assume that we're working with a well-designed RESTful API that works well with Ext JS. This'll give us some room to concentrate on some new ideas.

Tip

That's not to say you can skip over the API when designing your application. It is very rare you'll be working with a perfect backend, so keep analyzing whether the server is providing the endpoints you need.

We'll move on to looking at the rest of the application, but in a different way to previous chapters; once the data's been pulled down from the server, we'll try and consider how it's going to move through our app. We'll also look at...