JQuery :: AJAX Calls Acting Syncronously?
Aug 10, 2009
I am a newbie to using jquery and have been exploring it developing a new app. At the moment I have a number of AJAX calls to the server which I have been queueing in an array and using a single $.ajax call to handle all of them. However I know about the browser limitations of two calls per page (at the same time and want to implement this to speed up page updating). To test concurrent ajax requests I have setup various asp pages to with delays 1sec, 5sec, 10sec etc etc. and a test html file with the follwing javascript
[Code]...
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Jul 19, 2010
I'm trying to use the jqmodal dialog plugin and everything is working OK except for one minor problem. It seems when I click on the link, the expected action does not occur until I click the second time. Essentially I set up a small test form with a single line put into a table. In that data line is an href, which when clicked calls an AJAX function and returns text, which displays as a dialog. Like I said, this works fine except for the fact that the dialog does not show until the second time I click on the link. I added an alert box to the code, so I know the function is executed the first time the link is clicked
<script>
$().ready(function() {
$("#hrefClick").click(function(e) {
e.preventDefault();
[Code]....
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Nov 22, 2011
I've a js with a loop wich generate ten ajax calls, but I aboslutely need that the first will be executed before the others. how to ?
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Apr 14, 2009
I'm creating an AJAX page that is built using a PHP Class, ie the php looks a bit like this: PHP Code:
$wp_page->addjs('../var/savepolicies.js')
$wp_parser->page = "userpolicywindow.php";
$wp_parser->addlink("Home","../index.php","");
$wp_parser->addlink("Logout","javascript:logout();","");
$wp_parser->getpageid("501");
[Code]...
within this page that has been created, there is an AJAX tree folder which calls another page to be loaded into a DIV by AJAX again. Code:
[Code]...
I don't know why it doesn't work because the page has been loaded with the JS file, but as soon as the link is added afterwards it doesn't work. I take it this is because it doesn't know where to find the JS, but how can I overcome this?
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Feb 27, 2010
I'm experiencing a weird problem when trying to do a $.ajax call. When I pass 5 variables, with either GET or POST, the script runs as I would like. However, when I use 6 or more variables, the script does not run. Does anyone know why this is?
Relevant code (stops1-5 are defined as JS variables earlier in my script, and the alerts are for testing)
$(".barcrawl-stop-id").each(function(){
alert("running ajax function");
$.ajax({
url: "/handlers/ajax/barcrawl_reorder.php",
[Code]....
So, the way it is now, it works fine (I get the first alert for each instance of .barcrawl-stop-id, and get an alert at the end with the returned data). However, when I add another variable to the data, like stop4: stop4, the script does not run (all I see is one alert with "running ajax function").
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Nov 3, 2010
I know about the same-origin policy and that one of the only ways to load data from a cross-domain is to load it as JSON. However, all I am trying to do is access data from a server on another port (which I believe the browser still treats as cross-domain). I need to do this because the server my application is on is a map server and the other server (Apache) is the only one that can handle php scripts. I have also tried out the plug-in from [URL] and while it works when I do $('#phpContent').load('http://www.google.com'); it doesn't work when I try $('#phpContent').load('http://localhost:80/mapScripts/getFiles.php'); I have also tried$.get('http://localhost:80/mapScripts/getFiles.php', function(data) { $('#phpContent').html(data); });
So here I am breaking my brain and do not know what else to attempt.
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Aug 26, 2009
is there a possibility to chain AJAX Requests? By now i have 5 AJAX Functions where one calls the next (Button Click
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Jul 30, 2009
I am developing quite a complex user interface in jQuery that relies on an AJAX call to retrieve JSON.We have noticed that the code runs slow in IE7. IE8 and IE6 are acceptable. Firefox and Chrome really quick. I have traced the problem back to the AJAX call, which IE7 seems slow o process. What takes less than a second in the other browsers will take IE7 3 or 4. I have googled for an answer it seems there is some consensus that the native XHR in IE7 is slow, so it may not be a specific jQuery problem.Has anyone else experienced this? Does anyone have a solution? Please consider that this will be a public website, so the solution cannot involve altering settings on users' machines.
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Oct 27, 2010
I have a jquery based system with ajax calls instead of page refreshes. Every time I return some ajax content, it replaces the content on the main div.
function execcmdcallback(data, textStatus, XMLHttpRequest)
{
$("#divmain").html(data);
data = null;
}
Each time this executes, the browser memory increases by about 600-900kb. Can anyone suggest a way of doing this where the old memory is freed so there is no significant increase in browser memory on each ajax call ?
I've studied this a bit, [URL]..., but I have to admit I don't quite understand it I see the same issue on IE8, FF and Chrome. FF comsumes less memory per ajax call and frees some memory seconds later, but still the total working set is increasing on each call by 300k in FF and 600 to 900 in chrome and IE
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Jan 12, 2011
Basically, what I am trying to do is call several ajax requests using jQuery on the same page, i know that all browsers are capable of requesting multiple requests. However in Chrome and Safari my website works fine, but IE, Firefox and Opera all only call the first request then dont call, the second two. I dont know why though?
All of the code for the site is here: [URL]
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Jun 4, 2010
I'm trying to load a Javascript file which contains an array of data using .getScript(). It works fine on my server, but the request is never being made when I run it on my own computer, though the callback function is called. Is this an inherent limitation in JQuery/AJAX, or am I doing something stupid? code...
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Jul 6, 2011
I want to be able to load content of multiple divs in just one click.And after the content has been loaded make a final call to a function on success.I'm using JQuery.when() wich works fine like this
[Code]...
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May 26, 2010
Issues with jquery ajax calls with IE and what the workarounds are?
I'm having users complain about issues of an ajax call not working, however, I've been unable to reproduce this or see the error myself.
Works fine in firefox/safari/chrome. I have windows7 + IE8/IE7 to test and that works.
My call looks like this...
I added the _requestno parameter because i read that IE does some smart caching of ajax calls, but, that didn't solve the problem.
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Dec 7, 2010
I have a code that triggers ajax calls on button click, it all works fine but every now and then, the click triggers 2 AJAX calls. When i look at these calls in FB i see they succeeded (they get the expected response) but i get Timeout (I've set it to 3 seconds).
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Apr 7, 2011
I want to send another ajax request when one request is in process to get the status of first request.
If I call both the request the second request gets blocked till the completion of the first request.
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Mar 14, 2011
I'm actually not sure if this isn't possible to begin with, but thought I should ask as it's better safe than sorry. On a number of my pages, I use jQuery.ajax() using the json data type. For example:
[Code]...
Would it be possible for people to execute this script from their own server? If yes, is there any preventative measures I can take to block any remote execution of the script? And, are there any other safety concerns I need to be aware of?
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Mar 23, 2010
I've managed to use ajax to fetch and display the quotations which associate to a particular rep after i click that rep's name. But the only problem is the speed of response. The first few clicks are ok and very smooth. But after several tries, the response become slow and I cant even scroll down the webpage, and later on the web browser craches....
here it is:
<!-- Data display area -->
<br /><input type="image" id="printbtn" value="Print" src="images/printer.png"/><br />
<div id="container">
[code].....
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Aug 12, 2009
I recently downloaded a tabs plugin demonstrated on thisI tweaked the CSS so it matched my website, and brought in some dynamic content (via. PHP & MySQL). The PHP draws the 4 most recently updated blogs, and the tabbing system is picking which query is shown (news, rant, all)...btw, the 'news' and 'rant' currently just have 2 a piece for testing purposes.If you load it up with Google Chrome or Firefox you'll see it works fine, but if you load it up in IE, you'll see that INITIALLY it looks fine, but then each entries text chunks (title and posted X ago) get dropped underneath and the icon when a tab is clicked...the dashed line (spacer) also shortens momentarily.
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Sep 1, 2010
I've noticed this weird behaviour of jQuery in Safari and Chrome (didn't test on Firefox as I'm using some webkit CSS extensions). After setting up the call like this:
$.ajax( {
'url' : url,
'dataType' : 'json',
data : reqdata,
cache: false,
method: 'get',
timeout: 20000, //10 secs of timeout
success : function(data, textStatus, XMLHttpRequest) { .....
If a timeout occurs (I switch the local webserver off), the 'success' method will be called! More than this in the textStatus parameter there is a string with "success" !!! The error handler doesn't even get called.... (As you may notice the only way I had to tell the problem, was to check the data param if it is null or 0 length. How can I avoid this?
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Apr 23, 2010
I'm trying to build a page that has multiple ajax calls on it. When you do it the old-fashioned way with XmlHttpRequest, you'd create a new xhr object for every call so that they execute simultaneously. If I try to do this in jquery it will only execute a call when the previous one has completed. This makes the page load time completely unacceptable. How to improve the performance?
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Jun 25, 2010
I'm currently rewriting all my ajax calls to use the jquery method (much cleaner code! ) and have declared a default ajaxError function, shown below:
$(document).ajaxError(function(event, request, settings){
alert("There was an error while communicating with the server. URL: " + settings.url);
});
However, now I have a few ajax calls where I want to declare an error function in the ajax call. I was hoping that by declaring an error function in the ajax call, it would replace the default error call I have defined. But that does not appear to be the case, as I continue to first get my ajax function error call, then I also see the above code execute.
I tried calling event.stopImmediatePropagation() from within my ajax error function hoping that it would stop further events firing (ie: the default error event) but that didn't do anything except tell me in firefox that "event" was undefined.
I was hoping I wouldn't have to go through and define an error function to EVERY ajax call.
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Jul 6, 2009
I am trying out $.ajax instead of getJSON for debugging purposes. Because getJSON did not report an error in IE (6,7 or 8) and I am
trying to figure out why a jQuery plug-in is not painting my returned images to the screen in IE but is in other browsers. So I tried this. Interestingly enough, it hits the error event in IE but not firefox, safari and the rest and I don't know why (this code works great and renders my data just fine in FireFox and the rest). I know my returned json is valid:
$.ajax({
type: "GET",
url: "http://localhost:59396/sss/sssHandler.ashx?
action=getproducts&ids=" + ids,
[code]....
I don't know what else to do to troubleshoot why IE is having so much trouble with the returned JSON or just executing the function(data)
using either getJSON OR this. I have set the headers not the cache also in the response. IE refuses to enter my function(data) on the response.
[
{
"ImageTag": "u003cdiv class="CarouselItem
"u003e<p><img src="http://www.xxx.com/image/
[code]....
Same result. Firefox and the rest had no issue. IE still exited the $.ajax and my error method kicked in. No rhyme or reason whatsoever and I tried the IE Dev tools... nothing. About the only thing I get is this: Line: 163 Error: System error: -1072896658.Line 163 which is simply the line: function() { alert("An error has occurred. try again."); This has got to be the most f*d up situation I've been in and I need to get this working! I just cannot understand why IE can't parse a getJSON or $.ajax response, that is impossible or else there would be a huge meltdown with jQuery.
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Dec 4, 2011
This is really more a IE issue than jquery but I am using jquery.
Has anyone used this setTimeouts method from the IXMLHttpRequest2 object from IE.
I want to monkey path jquery calls with this call below. I tried this and I still get a property method error even though the method seems to be available. Has anyone experienced this?
With this Javascript code, I get this error "Object does not support this property or method" error. I checked that the methods are available and I do a check that the method is there. Am I sending the wrong number of args? Has anyone used this?
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Sep 28, 2010
I am working on a project that relies heavily on AJAX calls, they are done in dozens of places. There are a number of places where I would want to prevent the user from submitting information multiple times (form submissions etc ). I am trying to think of the best way to accomplish this.
I could simply disable the element that starts the AJAX call upon the first click and re-enable it upon completion of the call. I have also seen examples of developers using a class to handle ajax calls that store an identifier for the call and if it is in progress any new calls with the same identifier will be ignored.
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Aug 10, 2010
I should preface this by saying that this is not for my own site, or my own code; a friend has gone on holiday and needed this project fixing while he was away. Unfortunately my experience with jQuery is almost nil and everything was coded by someone else, so I'm really tearing my hair out. This is a Wordpress installation running Thematic with two child themes, one of which uses Ajax calls to grab page content. The issue is that the Ajaxified calls stop the swfObject content from being loaded. Compare:
[Code]....
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Sep 29, 2010
It felt like 99% of everything I do with jQuery involves a database some tree-structure so I figured I'd try jsTree out. I uploaded the demo and the way it seem to work is for every parent in the tree it calls a function get_children (PHP) with AJAX which makes a SELECT-query for that node to get the immediate children.
Am I missing something or isn't that extremely demanding on the database? The way I always do is get as much as I can from the database in one go then put it into PHP-arrays. With that plugin as I've seen a lot is that they put all the database-calls inside a class, do all those queries get pre-loaded or something when you call "new Database"? Or is a SELECT-query for a few rows just not that demanding at all?
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