Using $(this) In A Callback Function?
Oct 29, 2010
I have created a click event handler on an anchor and can reference it using $(this) just fine until I include a $.post function which processes the return data using a callback function. Once in the callback function, the $(this) no longer works.
How can I refer to the clicked anchor from within the $.post callback function? After way too long trying different combinations of things and making it work and break, I am first of all assuming that is what is going on, i.e. that once I am in the callback function, I no longer have access to $(this).
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Oct 10, 2009
how can i write a function that accepts a callback function?[URL].. i want myFunction to load some data via(an unordored list actually) load method end then somehow to return the wrapped elements for the callback function, exactly like load() does.
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Nov 10, 2011
What I did wrong to make this code not work. Can you put a variable in a function callback?
<script type="text/javascript">
var aaa = prompt('number?')
var obja = new Const(aaa);
functin Const(numb){
this.x=numb;
alert(obja.x);
}
</script>
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May 12, 2009
I'm trying to do some animation designs. Basically where I'm stuck is I have a bunch of things I want to do, but not until the duration of the switchClass method is complete. Looking at the UI documentation site, there doesn't appear to be a callback ability. how I can make a callback on the switchClass?
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Oct 5, 2009
How do I add a callback function to a plugin so that i can execute another function after the plugin completes its own processes.
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Apr 5, 2010
When i use
$(".rateit").click(function(){
$(this).next(".rateoptions").html('My options data here');
});
It works smoothly, But when I use this in a callback function it doesn't work as follow;
$(".rateit").click(function(){
$.get("test.php", function(data){
$(this).next(".rateoptions").html(data);
});
});
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May 9, 2011
I think that in jQuery 1.6 the callback function is failing in IE(8).I've reverted back to jq1.4 and all is okay. Sample code that fails in 1.6 for IE
8;$('#add_edit_contact_content').load('company/ajax/dsp_addEditContactContent.cfm', function(){
alert('loaded');
});
The error reported is; Message: Could not complete the operation due to error
80020101.
Line: 16
Char: 11777
Code: 0
URI: http://localhost:8300/XXXXXXXX/application/scripts/jQuery/jquery-1.6.min.js
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Apr 19, 2011
how i can use a callback function with remove() of jquery api
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Jul 5, 2010
Having a really hard time getting this to work, could use a little guidance on what I'm doing wrong....the code should be fairly self explanatory....
function callbackTest(file, callback)
{
$.get
[code]....
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Sep 30, 2010
I have some problem using the $.post function. I wrote a function that test if a username is already used in my database. That function must return true if the username is free and false in the other case. My problem is that I use the $.post function and I put the return true; and return false; in the callback function. So it's the callback function that returns true/false instead of my function !
Here is my code :
function validateName(){
$.post("ajax_is_name_used.php",
{name: $form_name.val()}, function(data) {
if (data.success == 1) {
$form_name.addClass("error");
return false; // Problem, we are in the callback function !
} else {
return true; // Problem, we are in the callback function !
}}, "json");}
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Aug 5, 2010
I'm a jQuery novice and I think I've gotten myself in over my head here. I have a #Calculatebutton with a click function attached which, when clicked, iterates through a form and sends the users input values, via $_GET, to a php script called'prepsession.php'. Here the inputs are validated and sanitized, a session is started and some session variables are created using the form input values. If there are any errors I want error messages displayed beside the form. Everything works fine up to this point.
If this script runs ok without giving any errors I would like to fire another php script called'printsummary.php'which accesses the previously created session variables and inserts them into a div #PanelContent. The reason I am usingseparatephp scripts for this is that I would like to be able to print my data in various different ways so I have numerous php print scripts accessing the session variables.
[Code]...
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Sep 8, 2011
This is the code. I tried exploring the options of SQL for solving this, but they are limited. I want to pass newSync[i].id to the onsuccess callback function, but I fail
Code:
I fail even if I add newSync[i].id as a third argument to function(tx,results)
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Mar 7, 2011
I am trying to implement the getJSON function.
My code for utilizing the getJSON follows:
Where un in a reference to a Textbox.
I can debug and verify that the call to
Occurs and return correct answers.
My problem is that the "success callback function" of the getJSON function is NEVER called.
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Jan 8, 2007
Is there a way to pass arguments to the callback function used inside an addEventListener? I see that I can only list the name of the callback function. For eg, I use this:
var boldLink=document.getElementById('cmtbold');
boldLink.addEventListener("click", rBold, true);
I need the id of boldLink to be accessible from inside the function
rBold()
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Sep 8, 2010
$("#scroll").hover(function(){
$(this).find(".front").stop().animate({
top:"184px"},500,function(){
$(this).find(".front").stop().animate({ top : "7px"}, 300);
});
});
I try to make a scrolling picture. when mouse roll over the image with .front class will scroll down, but it has to come back after mouse roll out. the scroll down is working but I wrote a callback function, but it doesn't work.
html part
<div id="scroll">
<a href="../images/big_html/babytracker_b.png">
<img src="../images/thumb_html/jukebox.jpg" />
<img src="../images/thumb_html/Tracker.jpg" class="front"/>
</a>
</div>
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Feb 13, 2011
am having a little bit of trouble with a callback function that seems to be executing immediately rather than waiting for the animation to finish.
[Code]...
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May 13, 2009
I'm trying to build a confirm dialog box. If found a nice plugin [URL] but the behavior is not like a normal confirm dialog box. You have to add a callback function to react on the ok/cancel buttons. Is it possible the simulate this behavior so I can have a function like this:
function showConfirmation(title, text){
//this displays a jQuery Dialog form and returns true/false
return myjQueryConfirm(title, text);
}
I tried this with the plugin:
function showConfirmation(title, text){
var res;
jConfirm(title, text, function (r) { res = r;});
return res;
}
But after the jConfirm is executed, the function proceeds and immediately returns res which is not defined.
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Nov 18, 2011
I'm trying to execute a simple JSON request using getJSON but I can't get a successful response. My code is below. If I run this I always receive an error. If I add "callback?" (making it JSONP) then I can see the correct results in Firebug but the call back function is never executed.
function getResults(url) {
var gptUrl = "[URL]";
$.getJSON(url, {f: "json"}, function() {
alert("success");
})
.success(function() { alert("second success"); })
.error(function() { alert("error"); })
.complete(function() { alert("complete"); });}
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Jan 2, 2012
I have following code in Javascript. I m calling live handler using jquery and get responsein json format but I get following problem while getting json response:When I call tnSearchClick() function on button’s click at that time the handler will call usinggetJSON method of jQuery but the response will take some seconds of time to returns response so that after few seconds the callback function will call and response can be accessed from callback function but because of handler get some seconds to execute remaining code in tnSearchClick() function after handler call code get executed before callback unction(before resonse will come) The following code will be executed before callback function will call(before response will return from handler)
if
(isValidate == true
)
[code]....
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Oct 8, 2010
I am using a json from a Google spreadsheet and a jquery plugin which is called throught this HTML line <ul id="example">.The thing is that when I dynamically append elements to the <ul id="example"> from within the JSON callback function, these are not recognized by the jquery plugin
Code:
<form>
<ul id="example">BLA BLA BLA</ul>
</form>
[code]....
If I insert an <ul id="example"> plus some <li> in the HTML code the plugin works perfect If I insert dynamically some <li> to the <ul id="example"> throught a javascrypt function before executing the callback (...json-in-script&callback=...) also work perfect.But when I insert dynamically the <li> elements within the callback function (in my case: cm_loadMapJSON) does not work well.
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Jun 3, 2010
I know this is a simple question with a simple answer, but I can't seem to wrap my brain around it.Sorry for the infantile nature of this post. Anyhow, I am making an AJAX call via JQuery and need the function to return a value from a calling function, like so:
[Code]...
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Feb 25, 2010
I have a small piece of code:
$(":input").each(function(){
alert(this.name);
---->OK
[code]....
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Feb 28, 2011
for example:the callback in jQuery.map( array, callback(elementOfArray, indexInArray) ) and the callback in
jQuery.each( collection, callback(indexInArray, valueOfElement) ) Look similar but the parameters are reversed Why not make a uniformstandard
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Mar 4, 2009
I have been trying to figure this out for a few days now and have finally come to the point where I think I got it but may just need a little push to get what I want.
Heres the situation:
I have this function that uses ajax to access a database and returns the results in the responseText. That part is working fine, I have confirmed that the responseText contains the information that I need
**************code*****************************************
//new ajax already created and assigned to the variable xmlhttp//
var response_recieved = "some data";
function get_answer(Table_Name, Field_Name, Data_Type) {
[Code]....
As evidence by my posting, this is not working correctly. The variable response_recieved is coming up undefined outside of the callback function assigned to the onreadystatechangeproperty.
Based on the information that I have gathered online from various forums, I believe this issue has to deal with a problem with closure in the callback function assigned to onreadystatechange property. I don't think it has any. Based on the fact that there is no anonymous function in that function. But my problem is that the call back function is anonymous itself... I think???
get the variable response_recieved to survive outside of this function.
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Aug 4, 2010
I am using jQuery 1.4.2 and I am trying to carry over the global variable totaltabs into my JSON callback function. The code seems to work properly, however, in my loadJSON function after the callback function loads the data, my totaltabs variable will not increment.
Here is a peak at my code.
totalItems is loaded from another function, not relevant to my example.
Code JavaScript:
var totaltabs = 0;
$(document).ready(function(){
resize();
[Code].....
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Mar 26, 2010
I have an unordered list with each LI having an onclick event of "changeTabContent". When the page loads, I trigger the active LI's click. On a click, first thing I do is remove the previous results, which are a UL living under the "li.active" element. Next, I move the "active" class to the LI that was pushed and off the old one. Next, I add a loading animation to the screen. Next I append a new UL to the new "li.active" and use the load() method to insert a bunch of LI's from a different page. onSuccess, I remove the loading animation. [note 1] Next, you'll see a hack I added, more on that in a minute... Last two steps are to add a "more" link to the bottom of the returned li's, if a link was passed into the function, and finally I remove a handful of LI's (excluding more link) so there are only "x" on the screen.
My #1 problem is that the more link is not showing up at times, and the cleanList function is not removing LI's. I believe the problem is that with the load being async, sometimes those last two steps are being hit, but there is no LI's in the DOM yet. You can see I tried to run a hack so the while loop will execute when there is no "ul" yet. [note 1] - I tried to add the final two steps into the load() callback, but the LI's were NEVER loaded in the DOM when the callback function was executed.
[Code]....
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