With an Ajax-enabled application,
after the initial loading of the page, subsequent requests can be handled
behind the scenes. Then the Web browser can be updated without the user
being aware
of the server
requests, the
downloading
of data, and so
on. In short,
Ajax provides
a nicer experience
for the
end user.
request
request request
response
response
response
response
response response
request
request
request
Ajax
var a=
var xl
if(xls
x introduction
what you??™ll learn
Ajax isn??™t really a ???thing??? in its own right so much as the combination of many
technologies. In this book, those are (X)HTML, CSS, JavaScript, XML, PHP,
MySQL, and SQL. The heart of an Ajax application is JavaScript and, in particular,
a little thing called an XMLHttpRequest object. The XMLHttpRequest object
wraps up all the functionality required to circumvent the old-fashioned clientserver
process.
However, this book won??™t teach you how to create just an Ajax-enabled application.
You??™ll see how to create a Web site that also works for those users who
can??™t take advantage of Ajax (because their browser doesn??™t support JavaScript
and XMLHttpRequest).
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
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14
15
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