Head Rush Ajax

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Chapter 3

What does asynchronous get you?

Both of the applications you’ve built so far are asynchronous.

Still, the server responded so fast to your requests that you

probably didn’t notice any benet from the asynchronous part

of these applications.

But what happens if it takes a really long time to get the data

back from the server? Or what if you really do need to do two

things at one time? You’d like to keep using the application

while that’s happening, right?

That’s when you’ll really see the benets of the “asynchronous”

part of Ajax. In fact, you’re going to build another

application—an Ajax-powered coffee maker—where being

asynchronous makes a big difference. Ready? Let’s get started.

So what’s the point of an

“asynchronous” application if the

server responds so fast that it

doesn’t make a difference anyway?

What applications do you use on

the Web that would be better if

they were asynchronous?

brain

power

asynchrony in the real world