By Jeremy Keith

Step by step consultant unearths most sensible practices for boosting sites with Ajax
* A step by step consultant to improving sites with Ajax.
* makes use of innovative enhancement strategies to make sure sleek degradation (which makes websites usable in all browsers).
* indicates readers how one can write their very own Ajax scripts rather than hoping on third-party libraries.

Web website designers love the assumption of Ajax--of developing web content within which info may be up-to-date with out fresh the total web page. yet if you aren't hard-core programmers, bettering pages utilizing Ajax could be a problem. much more of a problem is ensuring these pages paintings for all clients. In Bulletproof Ajax, writer Jeremy Keith demonstrates how builders happy with CSS and (X)HTML can construct Ajax performance with no frameworks, utilizing the information of swish degradation and innovative enhancement to make sure that the pages paintings for all clients. all through this step by step advisor, his emphasis is on top practices with an method of development Ajax pages referred to as Hijax, which improves flexibility and avoids worst-case scenarios.

Show description

Read Online or Download Bulletproof Ajax PDF

Best internet books

21 Recipes for Mining Twitter

Millions of public Twitter streams harbor a wealth of knowledge, and when you mine them, you could achieve a few worthy insights. This brief and concise booklet bargains a set of recipes that will help you extract nuggets of Twitter info utilizing easy-to-learn Python instruments. every one recipe bargains a dialogue of the way and why the answer works, so that you can quick adapt it to suit your specific wishes. The recipes comprise suggestions to:
* Use OAuth to entry Twitter facts
* Create and research graphs of retweet relationships
* Use the streaming API to reap tweets in realtime
* Harvest and examine neighbors and fans
* become aware of friendship cliques
* Summarize webpages from brief URLs

This ebook is an ideal significant other to O’Reilly's Mining the Social Web.

@heaven: The Online Death of a Cybernetic Futurist

1994, northern California. the net is simply rising from its origins within the army and collage study labs. teams of idealistic technologists, spotting its power as a device for liberation and team spirit, are operating feverishly to construct the community. within the early chat rooms of 1 such amassing, soon-to-become-famous because the good, a Stanford futurist named Tom Mandel creates a brand new convention.

Internet der Dinge in der Intralogistik

Die imaginative and prescient vom sich selbst steuernden Materialfluss, einem Netzwerk von gleichberechtigten Einheiten, die keine übergeordnete Koordination mehr brauchen, beginnt Gestalt anzunehmen. Experten aus Wissenschaft und Technik fordern ein Umdenken in der Intralogistik: weg von durchgeplanten, vorherbestimmten Systemen, hin zu einem „Internet der Dinge".

Make The Internet Your Warm Market: The Complete Guide to Networking through Instant Messaging (Soft

A useful booklet on connecting with new, present, and power consumers via rapid messaging on the net. Use the web as a strong prospecting device with the information during this needs to learn ebook

Extra info for Bulletproof Ajax

Example text

The error won’t be displayed in the browser. XMLHTTP"); } catch(e) { xhr = false; } } The try block contains the attempt to assign an instance of the ActiveX object to the variable xhr. If that doesn’t work, the catch block sets the value to false. catch statement can be used to refine the getHTTPObject function even further. Later versions of Internet Explorer can use a newer ActiveX object to handle Ajax. XMLHTTP"); } catch(e) { xhr = false; } } } return xhr; } After all that code forking, you now have a bulletproof way of instantiating an instance of XMLHttpRequest.

The send method. ONREADYSTATECHANGE Event handlers let you specify what behavior should occur when an event is triggered. Most events are triggered by the user. When a user places her cursor over an element in a Web page, the mouseover event for that element is triggered. The corresponding event handler is onmouseover. When a user submits a form, its submit event is fired. The event handler for this is onsubmit. Event handlers have been crucial to the success of JavaScript on the Web. For years, the most common uses of JavaScript were image rollovers and form validation.

54 Chapter 3 Asynchronous As well as the two required parameters, request method and URL, the open method also accepts some optional arguments. You can specify a Boolean value as the third argument for the open method. This indicates whether the request should occur asynchronously or not. If you specify a value of true, then the script will make an asynchronous request. This means it won’t wait for a response from the server before moving on to the rest of the script. If you specify a value of false, then the processing of the script will stop at that point.

Download PDF sample

Rated 4.81 of 5 – based on 44 votes