Top 100+ Ajax Interview Questions And Answers
Question 1. What Is Ajax?
Ajax isn’t a technology. It’s absolutely several technology, each flourishing in its own proper, coming collectively in effective new ways. Ajax consists of:
* standards-based presentation the use of XHTML and CSS;
* dynamic show and interaction using the Document Object Model;
* records interchange and manipulation the usage of XML and XSLT;
* Asynchronous data retrieval the usage of XMLHttpRequest;
Question 2. Who Is Using Ajax?
Google is creating a large investment in developing the Ajax approach. All of the foremost merchandise Google has added during the last yr like Orkut, Gmail, the contemporary beta model of Google Groups, Google Suggest, and Google Maps are Ajax programs. (For greater at the technical nuts and bolts of those Ajax implementations, take a look at out those fantastic analyses of Gmail, Google Suggest, and Google Maps.) Others are following suit: many of the capabilities that human beings love in Flickr rely upon Ajax, and Amazon’s A9.Com seek engine applies comparable techniques.
These projects display that Ajax isn't handiest technically sound, however additionally realistic for real-global programs. This isn’t every other generation that handiest works in a laboratory. Ajax applications can be any size, from the quite simple, unmarried-characteristic Google Suggest to the very complicated and sophisticated Google Maps.
At Adaptive Path, we’ve been doing our very own paintings with Ajax during the last numerous months, and we’re knowing we’ve handiest scratched the surface of the wealthy interplay and responsiveness that Ajax programs can provide. Ajax is an crucial improvement for Web programs, and its significance is growing. The biggest demanding situations in creating Ajax packages are not technical. The center Ajax technologies are mature, stable, and properly understood. As there are such a lot of builders obtainable who already understand the way to use those technologies, we count on to see many extra companies following Google’s lead in reaping the competitive gain Ajax presents.
The challenges are for the designers of these packages to neglect what we assume we know approximately the restrictions of the Web, and begin to assume a wider, richer variety of opportunities
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Question 3. How Ajax Is Different?
An Ajax utility eliminates the begin-forestall-start-stop nature of interplay on the Web with the aid of introducing an middleman — an Ajax engine — between the person and the server. It seems like adding a layer to the software might make it less responsive, however the contrary is genuine.
The synchronous interaction sample of a conventional web utility (pinnacle) as compared with the asynchronous pattern of an Ajax application (bottom).
Question four. Where Should I Start?
Question five. Do Ajax Applications Always Deliver A Better Experience Than Traditional Web Applications?
Not always. Ajax offers interaction designers extra flexibility. However, the greater energy we've got, the greater caution we should use in exercise it. We must be cautious to apply Ajax to decorate the person revel in of our packages, not degrade it.
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Question 6. Are Ajax Applications Easier To Develop Than Traditional Web Applications?
Question 7. Does Ajax Work With Java?
Absolutely. Java is a amazing healthy for AJAX! You can use Java Enterprise Edition servers to generate AJAX customer pages and to serve incoming AJAX requests, manipulate server side state for AJAX customers, and join AJAX clients in your employer resources. The JavaServer Faces thing model is a tremendous in shape for outlining and the usage of AJAX components.
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Question 9. Won't My Server-facet Framework Provide Me With Ajax?
You can be making the most of AJAX already. Many current Java primarily based frameworks have already got some level of AJAX interactions and new frameworks and issue libraries are being developed to provide better AJAX support. I may not listing all of the Java frameworks that use AJAX here, out of worry of missing a person, but you can discover a top listing at www.Ajaxpatterns.Org/Java_Ajax_Frameworks.
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Question 10. Did Adaptive Path Invent Ajax? Did Google? Did Adaptive Path Help Build Google's Ajax Applications?
Neither Adaptive Path nor Google invented Ajax. Google’s recent merchandise are honestly the very best-profile examples of Ajax packages. Adaptive Path turned into not involved within the improvement of Google’s Ajax packages, but we had been doing Ajax work for a number of our different clients.
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CSS Interview Questions
This is working code, it would assist you.
xmldoc = req.ResponseXML;
//IE does no longer take the responseXML as.
XML Interview Questions
Question 13. What Do I Need To Know To Create My Own Ajax Functionality?
If you intend now not to reuse and existing AJAX element, right here are some of the matters you will want to recognize.
DOM - An API for having access to and manipulating structured documents. In maximum cases DOM constitute the shape of XML and HTML documents.
Understanding the basic request/reaction nature of HTTP is likewise important. Many subtle bugs can result if you forget about the differences between the GET and OIst methods while configuring an XMLHttpRequest and HTTP reaction codes while processing callbacks.
There are many libraries/frameworks out there (and many greater emerging) as a way to assist abstract such things as all the nasty browser differences. Three exact libraries are The Dojo Toolkit, Prototype, and DWR.
Question 15. What Is The Difference Between Proxied And Proxyless Calls?
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XML - Web Services and AJAX appear made for one another. You can use client-aspect API's for downloading and parsing the XML content material from RESTful Web Services. (However remember with a few SOAP primarily based Web Services architectures he payloads can get quite big and complex, and therefore may be inappropriate with AJAX techniqes.)
Plain Text - In this case server-generated textual content may be injected right into a record or evaluated with the aid of client-aspect good judgment.
HTML - Injecting server-generated HTML fragments immediately right into a record is commonly a completely powerful AJAX technique. However, it may be complex retaining the server-aspect issue in sync with what is displayed on the customer.
Mashup is a famous time period for creating a very new net software via combining the content material from disparate Web Services and different online API's. A accurate instance of a mashup is housingmaps.Com which graphically combines housing need-ads from craiglist.Org and maps from maps.Google.Com.
Question 17. Are There Usability Issues With Ajax?
The nature of updating a page dynamically using information retrieved via AJAX interactions and DHTML might also result in notably converting the arrival and state of a page. A consumer might choose to use the browser's lower back or ahead buttons, bookmark a web page, copy the URL from the URL bar and proportion it with a friend via an email or chat patron, or print a page at any given time. When designing an AJAX based totally application you need to consider what the expected conduct could be in the case of navigation, bookmarking, printing, and browser guide as described below.
Bookmarking and URL sharing - Many customers want to bookmark or reduce and paste the URL from the browser bar. Dojo presents patron-side for bookmarking and URL manipulation.
Printing - In a few instances printing dynamically rendered pages can be complicated.
Other concerns as a developer when the use of AJAX are:
Browser Support - Not all AJAX/DHTML capabilities are supported on all browsers or all variations of a browser. See quirksmode.Org for a list of browser aid and possible workarounds.
Latency - Keep in thoughts latency to your design. A walking software might be much extra responsive than while it's miles deployed.
Latency problems: fantasy or truth?
Accessibility - Guaranteeing your web site is out there to humans with disabilities isn't always most effective a noble intention, it is also requited via law in lots of markets. Some superb enabling generation is available to help people use the Web regardless of disabilities together with visual, auditory, physical, speech, cognitive, and neurological disabilities. With a touch forethought, and comprehension of some well documented satisfactory practices, you could assure that your software is well suited with that enabling technology.
Degradability is the time period used to describe techniques utilized by net applications to evolve to the wide range of net browser capabilities. Many AJAX libraries have automatic degradability constructed in. But in case you are coding your own custom AJAX capability, genuinely taking a few care to observe the excellent practices promoted through requirements bodies just like the World Wide Web Consortium (W3C), and grass root moves just like the Web Standards community and plenty of others, your utility can run usefully on browsers which are incapable of AJAX behaviors. Granted, your utility might also unfastened some of the "wow factor" on those much less capable browsers, however your application will still be usable.
Remember to not design with AJAX only for the sake of coolness. The cause you constructed your utility is so human beings will use it. And human beings will now not use your utility in case your application isn't well suited with their web browser.
XSLT Interview Questions
Question 18. Are There Any Frameworks Available To Help Speedup Development With Ajax?
There are numerous browser-side frameworks to be had, each with their personal strong point...
HTML Interview Questions
Question 19. Is Adaptive Path Selling Ajax Components Or Trademarking The Name? Where Can I Download It?
Ajax isn’t some thing you can download. It’s an technique — a way of thinking about the architecture of net packages using positive technology. Neither the Ajax call nor the approach is proprietary to Adaptive Path.
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Question 20. Should I Use An Http Get Or Post For My Ajax Calls?
AJAX requests need to use an HTTP GET request when retrieving information in which the facts will not trade for a given request URL. An HTTP POST should be used whilst country is up to date at the server. This is in keeping with HTTP idempotency guidelines and is distinctly recommended for consistent web application structure.
Java XML Interview Questions
There are not that many equipment out there on the way to guide both purchaser-facet and server-aspect debugging. I am certain this may trade as AJAX applications proliferate. I presently do my patron-facet and server-aspect debugging one after the other. Below is a few records at the customer-facet debuggers on some of the commonly used browsers.
Safari - Has a debugger which needs to be enabled. See the Safari FAQ for details.
While debuggers assist a not unusual approach knowing as "Alert Debugging" may be used. In this example you location "alert()" feature calls inline similar to you will a System.Out.Println. While a little primitive it works for most basic instances. Some frameworks which include Dojo provide APIs for tracking debug statements.
Question 22. How Do I Provide Internationalized Ajax Interactions?
Just due to the fact you're using XML does not suggest you can properly ship and obtain localized content material the use of AJAX requests. To offer internationalized AJAX components you want to do the subsequent:
Step 1. Set the charset of the web page to an encoding that is supported by your target languages. I have a tendency to apply UTF-8 because it covers the most languages. The following meta declaration in a HTML/JSP page will set the content material kind:
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
Step three. On the server-side element set the person encoding using the HttpServletRequest.SetCharacterEncoding() method. Before you get entry to the localized parameter the usage of the HttpServletRequest.GetParameter() name. In the case of UTF this would be request .Set Characther Encoding ("UTF-8");.
A server-aspect thing returning AJAX responses desires to set the encoding of the reaction to the same encoding used within the web page.
reaction.GetWriter().Write(" <response>invalid </response>");
For more information on the usage of AJAX with Java Enterprise Edition technologies see AJAX and Internationalization and for developing multi-lingual programs see Developing Multilingual Web Applications Using JavaServer Pages Technology.
Java XML Tutorial
Question 23. Some Of The Google Examples You Cite Don't Use Xml At All. Do I Have To Use Xml And/or Xslt In An Ajax Application?
XMLHttpRequest (XHR) Interview Questions
Question 24. When Do I Use A Synchronous Versus Asynchronous Request?
They do not name it AJAX for nothing! A synchronous request might block in web page occasion processing and I do not see many use cases wherein a synchronous request is finest.
Java Script Interview Questions
Question 25. How Do I Handle Concurrent Ajax Requests?
Characteristic AJAXInteraction(url, callback)
var req = init();
req.Onreadystatechange = processRequest;
return new XMLHttpRequest();
else if (window.ActiveXObject)
return new ActiveXObject("Microsoft.XMLHTTP");
function processRequest ()
if (req.ReadyState == 4)
if (req.Status == 2 hundred)
if (callback) callback(req.ResponseXML);
this.DoGet = feature()
req.Open("GET", url, genuine);
this.DoPost = function(frame)
req.Open("POST", url, proper);
var ai = new AJAXInteraction("processme",
function() alert("Doing Post Process"););
The characteristic makeRequest() in the example above creates an AJAXInteraction with a URL to of "processme" and an inline characteristic that will show an alert conversation with the message "Doing Post Process". When ai.DoGet() is known as the AJAX interaction is initiated and while server-facet component mapped to the URL "processme" returns a report that's surpassed to the callback function that become detailed when the AJAXInteraction changed into created.
Using this closures insures that the right callback feature associated with a particular AJAX interaction is referred to as. Caution need to still be taken whilst creating multiple closure gadgets in that make XmlHttpRequests as to there is a confined variety of sockets that are used to make requests at any given time. Because there are restricted quantity of requests that may be made concurrently. Internet Explorer for instance most effective lets in for two concurrent AJAX requests at any given time. Other browsers can also permit greater however it is commonly among 3 and 5 requests. You may pick out to use pool of AJAXInteraction objects.
One aspect to note when making multiple AJAX calls from the patron is that the calls aren't assured to go back in any given order. Having closures in the callback of a closure item can be used to make certain dependencies are processed effectively. There is a discussion titled Ajaxian Fire and Forget Pattern this is useful.
Question 26. What Do I Do On The Server To Interact With An Ajax Client?
The "Content-Type" header needs to be set to"textual content/xml". In servlets this could be finished the usage of the HttpServletResponse.SetContentType()have to be set to "textual content/xml" when the go back type is XML. Many XMLHttpRequest implementations will result in an blunders if the "Content-Type" header is ready The code beneath suggests the way to set the "Content-Type".
You may also need to set whether or not or now not to set the caches header for cases which includes autocomplete in which you could need to inform proxy servers/and browsers no longer to cache the outcomes.
Note to the developer: Internet Explorer will automatically use a cached result of any AJAX response from a HTTP GET if this header isn't always set that may make matters difficult for a developer. During improvement mode you can need set this header. Where do I keep country with an AJAX purchaser
As with different browser primarily based web programs you have a few options which include:
On the consumer inside the page - This may be executed securely but can be complex and tough to paintings with. See my blog entry on Storing State at the Client for greater info in this subject matter.
On the customer record machine - This may be carried out if the customer presents get entry to to the browser to put in writing to the local record machine. Depending on your uses cases this could be necessary however caution is advised.
On the Server - This is in the direction of the conventional model where the consumer view is of the nation on the server. Keeping the statistics in sync may be a bit difficult and for that reason we've an answer Refreshing Data in this. As more records processing and control actions to the purchaser where state is stored will need to be re-evaluated.
Question 27. Whats With The -alpha In The Install Instructions?
HTML_AJAX hasn't had a solid launch yet and the pear installer does not installation non solid applications by using default except you specify a version.
Android Interview Questions
Question 28. How Do I Submit A Form Or A Part Of A Form Without A Page Refresh?
<form onSubmit="doAJAXSubmit();return false;" >
<input type="text" id="tf1" />
<input type="submit" id="submit1" value="Update"/>
You can also submit statistics by means of associating a characteristic with a form button in a similar manner.
<form onSubmit="doAJAXSubmit();return false;" >
<input type="text" id="tf1" />
<input type="button" id="button1" onClick="doAJAXSubmit()" value="Update"/>
Note that the form "onSubmit" characteristic is still set. If the consumer hits the input key within the text area the shape will be submitted so you nonetheless want to address that case.
When updating the page it's far endorse you wait to make certain that the AJAX replace of the shape statistics was successful earlier than updating the records within the page. Otherwise, the records won't well update and the consumer won't know. I like to offer an informative message when doing a partial replace and upon a a hit AJAX interaction I will then replace the page.
XML DOM Tutorial
Question 29. How Do I Test My Ajax Code?
XML DOM Interview Questions
Question 30. What Exactly Is The W3c Dom?
The W3C Document Object Model (DOM) is defined by means of the W3C as the following: The Document Object Model is a platform- and language-neutral interface.
Question 31. When Will Html_ajax Have A Stable Release?
Once all the foremost features are entire and the API has been examined, the roadmap gives an idea of what's left to be accomplished.
Question 32. What Parts Of The Html_ajax Api Are Stable?
We do not have a list proper now, however maximum of the API is solid as of zero.3.Zero. There need to be no fundamental modifications at this factor, though there may be plenty of latest additions.
Question 33. What Browsers Does Html_ajax Work With?
We do not have a listing proper now, however maximum of the API is solid asAs of zero.3.Zero, all of the examples that deliver with HTML_AJAX have been established to work with
Internet Explorer five.5+ (5.0 have to work however it hasn't been examined)
Most things paintings with
Opera eight.Five+ of 0.3.0. There need to be no fundamental adjustments at this point, even though there will be masses of recent additions.
CSS Interview Questions
Question 34. Is The Server Or The Client In Control?
It relies upon. With AJAX the solution is greater in among. Control may be more centralized in a server-aspect element or as a mix of customer-side and server-side controllers.
There are a few use cases in which an entire AJAX utility can be written in a single page. Keep in mind in case you select this form of structure that navigation and bookmarking ought to be taken into consideration.
Both strategies are possible relying on what you are attempting to accomplish. I tend to choose spreading the manipulate throughout the customer and server.
Question 35. Is Ajax Just Another Name For Xmlhttprequest?
No. XMLHttpRequest is simplest a part of the Ajax equation. XMLHttpRequest is the technical thing that makes the asynchronous server communique feasible; Ajax is our name for the general method described in the article, which is predicated not only on XMLHttpRequest, however on CSS, DOM, and different technology.
Question 36. How Do I Abort The Current Xmlhttprequest?
Just call the abort() method on the request.
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Question 37. What Is The Minimum Version Of Php That Needs To Be Running In Order To Use Html_ajax?
The oldest PHP model i have fully examined HTML_AJAX is four.Three.11, however it must run on four.2.Zero without any troubles. (Testing reviews from PHP versions older then four.3.11 would be favored.)
Question 38. Why Does Html_ajax Hang On Some Server Installs?
If you run into an HTML_AJAX hassle most effective on a few servers, probabilities are your strolling into a hassle with output compression. If the output compression is treated inside the PHP config we locate that and do the proper aspect, but if its finished from an apache extension we haven't any manner of understanding its going to compress the frame. Some times putting HTML_AJAX::sendContentLength to false fixes the problem, but in different cases you'll need to disabled the extension for the AJAX pages.
Question 39. How Do We Get The Xmlhttprequest Object?
Depending upon the browser...
// Internet Explorer http_request = new ActiveXObject("Microsoft.XMLHTTP");
Question 40. Are There Any Security Issues With Ajax?
You want to be cautious not to show your software version in inclusive of manner that your server-side additives are at danger if a nefarious user to opposite engineer your application. As with any other internet application, don't forget the use of HTTPS to relaxed the relationship when personal information is being exchanged.
XSLT Interview Questions
Question 41. What About Applets And Plugins?
Don't be too short to dump your plugin or applet based totally quantities of your utility. While AJAX and DHTML can do drag and drop and different advanced consumer interfaces there still limitations specially with regards to browser guide. Plugins and applets were round for some time and were able to make AJAX like requests for years. Applets provide a high-quality set of UI additives and APIs that provide developers actually anything.
Many humans push aside applets or plugins due to the fact there is a startup time to initialize the plugin and there is no guarantee that the wanted model of a plugin of JVM is set up. Plugins and applets won't be as able to manipulating the web page DOM. If you are in a uniform environment or can depend upon a selected JVM or plugin version being to be had (including in a company surroundings) a plugin or applet answer is excellent.
One issue to don't forget is a mixture of AJAX and applets or plugins. Flickr uses a ombination of AJAX interactions/DHTML for labeling photographs and user interaction and a plugin for manipulating images and photo sets to provide a brilliant user experience. If you design your server-side components properly they can communicate to both sorts of clients.
Question 42. Is Ajax Code Cross Browser Compatible?
Java XML Interview Questions
Question forty three. Techniques For Asynchronous Server Communication Have Been Around For Years. What Makes Ajax A "new" Approach?
What’s new is the prominent use of these strategies in actual-global packages to change the fundamental interplay version of the Web. Ajax is taking preserve now because these technologies and the enterprise’s expertise of a way to installation them maximum correctly have taken time to increase.
Question 44. Is Ajax A Technology Platform Or Is It An Architectural Style?
It’s each. Ajax is a set of technology being used together in a selected way.
Question 45. How Do I Handle The Back And Forward Buttons?
Feature updateOnServer(oldId, oldValue,
var bindArgs =
content material: "component-identification": itemId, "component-price":
mimetype: "textual content/xml",
load: feature(type, records)
alert("old itemid become " + oldId);
alert("forward we must cross!");
The instance above will replace a price at the server using dojo.Io.Bind() with a function as a assets that is responsible for dealing with the browser back button occasion. As a developer you are capable of restoring the cost to the oldValue or taking every other action which you see match. The underlying info of ways the how the browser button event are detected are hidden from the developer by way of Dojo.
Question forty six. How Does Html_ajax Compare With The Xajax Project At Sourceforge?
But it also has the capability to put in writing your very own records managing workouts, automatically sign up lessons and methods the usage of a server "proxy" script, do one of a kind kinds of callbacks along with grabbing faraway urls, select between sync and async requests, has iframe xmlhttprequest emulation fallback competencies for customers with vintage browsers or disabled activeX, and is in active development with extra capabilities deliberate (see the Road Map for information)
If you're asking that's "higher" - as with maximum Hypertext Preprocessor scripts it is a count number of taste and need. Do you want a brief, simple ajax solution? Or do you need some thing it really is bendy, extensible, and looking to comprise even more exceptional functions? It relies upon on the project, you as a writer, and your destiny plans.
Question 47. What Browsers Support Ajax?
Internet Explorer 5.Zero and up, Opera 7.6 and up, Netscape 7.1 and up, Firefox 1.0 and up, Safari 1.2 and up, amongst others.
Question 48. How Do I Send An Image Using Ajax?
While it can appear that snap shots are being sent whilst the usage of AJAX with an utility like Google Maps what is simply happening is that the URLs of photos are being ship because the reaction of an AJAX request and people URLs are being set the usage of DHTML.
In this case an XML document is lower back from an AJAX interaction and the class bar is populated.
<description>Fun to examine</description>
<description>Must have devices</description>
Notice that the image-url detail includes the area of the URL for the image representing a class. The callback approach of an AJAX interaction will parse the reaction XML file and speak to the addCategory function for every class blanketed in the response XML record. The addCategory characteristic seems up a table row element "categoryTable" in body of the page and adds a row to the detail which incorporates the photo.
Function addCategory(id, name, imageSrc)
var categoryTable = report.GetElementById("categoryTable");
var row = document.CreateElement("tr");
var catCell = file.CreateElement("td");
var img = document.CreateElement("img");
img.Src = ("photos" + imageSrc);
var link = document.CreateElement("a");
hyperlink.SetAttribute("onclick", "catalog?Command=class&catid=" + identity);
<td width="300" bgoclor="lightGray">
<table id="categoryTable" border="0" cellpadding="0"></table>
<td id="body" width="100%">Body Here</td>
Note that the source of the photograph is ready to the image supply. The image is loaded by way of a next HTTP request for the picture at the URL "photos/books_icon.Gif" or "photos/electronic_icon.Gif" that takes place whilst the img detail is brought to the categoryTable.
Most integration might take area in higher level additives. Its uncertain whether higher level components like that have to be a part of HTML_AJAX delivered through PEAR or in the event that they need to just be supported with the aid of HTML_AJAX and made to be had from http://htmlajax.Org or a few other web site. If your interested in building widgets or components based on HTML_AJAX please let me recognise.
To do this you just want to sign up the library together with your server and cargo add its flag on your include line.
<script type="text/javascrpt" src="server.Php?Client=scriptaculous">
Question 50. When Should I Use A Java Applet Instead Of Ajax?
Applets offer capabilities like custom records streaming, photograph manipulation, threading, and superior GUIs which AJAX can not.
However, with the assist of DHTML, the functionalities of AJAX may be extended in addition.
AJAX requires that the browser be DHTML and AJAX succesful.
AJAX/DHTML works nicely for applications where the cutting-edge browsers are used.
Question 51. What Kinds Of Applications Is Ajax Best Suited For?
We don’t know yet. Because that is a particularly new technique, our knowledge of in which Ajax can nice be carried out continues to be in its infancy. Sometimes the traditional internet utility model is the most appropriate solution to a problem.
Question 52. Does This Mean Adaptive Path Is Anti-flash?
Not in any respect. Macromedia is an Adaptive Path purchaser, and we’ve long been supporters of Flash era. As Ajax matures, we assume that every now and then Ajax may be the higher technique to a selected trouble, and from time to time Flash could be the better solution. We’re also interested in exploring ways the technologies may be mixed (as within the case of Flickr, which makes use of both).
Question 53. Where Can I Find Examples Of Ajax?
While components of AJAX had been around for a while (for instance, 1999 for XMLHttpRequest), it definitely failed to turn out to be that famous till Google took. But Global Guide Line guide all of its visitors to study AJAX from absolute newbie to develop level.
Question 54. What Is The Xmlhttprequest Object?
The solution to all of these questions is “maybe”. Many builders are already working on ways to deal with those worries. We assume there’s more paintings to be finished to determine all the limitations of Ajax, and we expect the Ajax improvement community to uncover more problems like these along the manner.
Question 56. How Do I Access Data From Other Domains To Create A Mashup With Java?
Question 57. Does Java Have Support For Comet Style Server-aspect Push?
Current AJAX packages use polling to talk changes information between the server and customer. Some applications, together with chat applications, inventory tickers, or score forums require more immediately notifications of updates to the purchaser. Comet is an occasion based totally low latency server side push for AJAX applications. Comet conversation keeps one of the two connections available to the browser open to constantly communicate occasions from the server to the client. A Java based totally solution for Comet is being developed for Glassfish on top of the Grizzly HTTP connector. See Enabling Grizzly by way of Jean-Francois Arcand for more info.
Question fifty eight. How Do We Create A Thread To Do Ajax Polling?
// begin AJAX interaction with processCallback because the callback function
// callback for the request
// do post processing
Notice that the checkForMessage will keep to loop indefinitely. You might also need to vary the increment the c program languageperiod primarily based on pastime inside the web page or your use instances. You may pick out to have good judgment that might break out of the loop primarily based on some AJAX reaction processing circumstance.
Question fifty nine. Is The Xmlhttprequest Object Part Of A W3c Standard?
No. Or not but. It is part of the DOM Level three Load and Save Specification suggestion.
Question 61. Can You List Some Examples Of Ajax-based totally Applications?
Some applications and scenarios in which AJAX is utilized include login paperwork, auto-complete (e,g. Google seek ),