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Explaining Ajax

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Information about Explaining Ajax

Published on October 15, 2007

Author: adactio

Source: slideshare.net

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Ajax Jeremy Keith clear:left

buzzword Αἴας

buzzword2 . 0 long tail participation RSS Ajax mashups open data folksonomy APIs

word Sapir–Whorf hypothesis

“It’s really several technologies, each flourishing in its own right, coming together in powerful new ways.”

peak of inflated expectations plateau of productivity slope of enlightenment trough of disillusionment technology trigger

“The name is shorthand for Asynchronous JavaScript + XML”

Asynchronous JavaScript And HTML XML JSON

Asynchronous JavaScript AndDOM Scripting XML DHTML

Asynchronous JavaScript “Not at the same time” And XML

Asynchronous

Asynchronous

speed

“If the traditional web was letter writing, Ajax is instant messaging.”

“Ajax is like roller skates for the Web.”

“Ajax is a way of communicating with the server without refreshing the whole page.”

frames iframe Flash XMLHttpRequest

Microsoft IE5 Mozilla Safari Opera W3C XMLHttpRequest

Ajax in action

documents applications

thin client browser server displaying data processing

fat client browser XHR server displaying data processing

dumb waiter

progressive enhancement Hijax

progressive enhancement using XMLHttpRequest

behaviour JavaScript presentation CSS structureHTML content

browser server displaying data processing

deceptively fat client browser XHR server displaying data processing

Hijax in action

{ navigation search main content browser server on form log shopping cart footer

navigation search main content browser XHR log on form shopping cart footer

paradox? plan for Ajax from the start implement Ajax at the end

pattern recognition add a comment log on add to cart rate this search results? pagination?

beware <a href=quot;javascript:...quot;> <a href=quot;#quot; onclick= quot;...quot;>

design challenges

“Don’t be too proud of this technological terror you have created.”

what’s happening?

what just happened?

beyond the browser the back button bookmarking

user testing

Accessibility Just Ain’t eXciting

“It must still be accessible. It must be usable. If not, it is a cool useless piece of rubbish for some or many people.”

“Unless a way can be found to notify screen readers of updated content, AJAX techniques cannot be considered accessible.”

“This Ajax application is usable by screen-reader users some of the time. They aren’t totally shut out, but it isn’t totally easy for them, either.”

“The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect.”

thank you adactio.com http://flickr.com/photos/flydown/42047131/ http://flickr.com/photos/bizzygirl/291918549/ http://flickr.com/photos/benchan/150094224/ http://flickr.com/photos/rogerjones/121736518/ http://flickr.com/photos/veeliam/243306535/ http://flickr.com/photos/ianlloyd/240719862/ http://flickr.com/photos/doctorow/94673455/ http://flickr.com/photos/chuckbiscuito/161971512/

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