Lecture 16 - Ajax - annotated

Lecture 16 - Ajax - annotated - 1 Ajax INFO/COM S 230...

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Unformatted text preview: 1 Ajax INFO/COM S 230: Intermediate Web Design and Programming Prelim raw scores Prelim stats High: 97.5 Mean: 72.5 Median: 76 Std dev: 16 Section Section Friday is optional. We’ll hand back exams and go over any questions you might have. For sections meeting at the same time, will only have one of them. Lectures next week are also optional. What is it? Ajax isn’t its own technology – it’s just shorthand for a cluster of technologies • XHTML + CSS • JavaScript • DOM • + one more that help web applications work more like desktop applications Easy PDF Creator is professional software to create PDF. If you wish to remove this line, buy it now. 2 Term coined by Jesse James Garrett in Feb. 2005 essay (http://www.adaptivepath.com/p ublications/essays/archives/000 385.php ) to discuss how these technologies work together; shorthand for ‘Asynchronous JavaScript and XML’. What does it do? Typical web application Web application using Ajax Request sent to server while user is still interacting with website. Using JavaScript and the DOM, we can update the page with results from the server. The usual suspects Some of the web applications that gave lots of visibility to the idea of Ajax: • Microsoft Outlook Webmail • Google Suggest • Google Maps Easy PDF Creator is professional software to create PDF. If you wish to remove this line, buy it now. 3 How does it work? What kinds of things will we need to get something like this to work? A special ‘request’ We’ll use an instance ‘request’ of the object XMLHttpRequest to send information ‘asynchronously’ between the browser and the server....
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This note was uploaded on 04/01/2008 for the course INFO 2300 taught by Professor Williamson during the Spring '08 term at Cornell.

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Lecture 16 - Ajax - annotated - 1 Ajax INFO/COM S 230...

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