i have problem with refreshing content in wrapper after it is loaded by ajax.
When i check with firebug - XHR is showing request and i can see elements loaded but it isn't showing on page.
This is what i am using for pullDown function to get ajax content
function pullDownAction () {
setTimeout(function () {
var el, li, i;
el = document.getElementById('thelist');
var http = new XMLHttpRequest();
var url = window.location;
http.open("GET",url,true);
http.send();
myScroll.destroy();
myScroll = null;
loaded();
}, 1000);
}
It looks like as content is stuck between showing on webpage and ajax request.
Any idea?
myScroll.refresh() (instead of .destroy() and recalling "loaded()") should do the trick!
If you're using IScroll4 you can try to use the checkDOMChanges:true option of iscroll.
If it still won't work - it could be a CSS issue caused by the scroll-wrapper (#scroller) not expanding with its content. (float,position:absolute; or something like that)
EDIT: it seems to me as you're not handling a responseText of the request at all!
According to this example you need an event handler for the onreadystatechange event:
http.open("GET",url,true);
http.onreadystatechange = function () {
if (http.readyState == 4) {
alert(http.responseText); //handle this response! (i.e. writing to an element's innerHTML)
}
};
http.send(null);
Related
Is it possible to add event listeners for a document before a page has been navigated to using a Bootstrapped add-on? I would like to see what page the user wants to navigate to as well as later after the page loads to inspect the DOM. I need to run code in the HTML content context.
In the past I used a toolbar XUL and included javascript within it and it would load before the HTML page loaded.
i looked into doing stuff before DOMContentLoaded sometime ago and found out there is a document inserted observer.
order of events after running research code at bottom
readystate changes to interactive (i think multiple times, not sure)
readystate changes to complete
DOMContentLoaded event fires
load event fires (Sometimes load doesnt fire, if you might have to change addEventListener with capture arugment (3rd argument) as false or true)
apparently there should be readystate loading before all of this but i can never catch it i dont know why.
after running the code in scratchpad, browser environemnt of course, then load a new page and watch the error console it will throw these reports in this order:
ready state changed! ("interactive") Scratchpad/4:18
02:28:07.873 ready state changed! ("complete") Scratchpad/4:18
02:28:07.874 DOMContentLoaded event fired! Scratchpad/4:53
02:28:07.938 Load event fired! Scratchpad/4:45
here is the research code. it adds a the listeners and observer to see whats firing.
var {classes: Cc, interfaces: Ci, utils: Cu} = Components;
var os = Cc['#mozilla.org/observer-service;1'].getService(Ci.nsIObserverService);
var LMObserver;
function myObserver() {
this.register();
}
myObserver.prototype = {
observe: function (subject, topic, data) {
//Cu.reportError(subject);
//Cu.reportError(data);
//i think subject is window element
subject.onreadystatechange = function () {
//loading
//interactive
//complete
Cu.reportError('ready state changed! ("' + subject.readyState + '")');
//var body = subject.documentElement.querySelector('body')
//you want to change title so you would do that here do something like: if (subject.readystate == 'complete') { subject.title = 'blah blah' }
//Cu.reportError('has body element: ' + body)
}
},
register: function () {
os.addObserver(this, 'document-element-inserted', false);
},
unregister: function () {
os.removeObserver(this, 'document-element-inserted', false);
}
};
//below this is the DOMContentLoaded thing i put this here so we can see what fires in what order
var pageLoad = function(event) {
var win = event.originalTarget.defaultView;
if (win && win.frameElement) {
return;
}
Cu.reportError('Load event fired!');
}
var pageDOMContentLoaded = function(event) {
var win = event.originalTarget.defaultView;
if (win && win.frameElement) {
return;
}
Cu.reportError('DOMContentLoaded event fired!');
}
LMObserver = new myObserver;
gBrowser.addEventListener("load", pageLoad, true);
gBrowser.addEventListener("DOMContentLoaded", pageDOMContentLoaded, true);
//gBrowser.removeEventListener("load", pageLoad, true);
//gBrowser.removeEventListener("DOMContentLoaded", pageDOMContentLoaded, true);
//LMObserver.unregister();
Here's some more indepth research on load events added with true or false as capture argument: https://github.com/Noitidart/event-listener-experiment-DOMC-and-load/blob/master/bootstrap.js
Here is the problem:
By default jQuery Mobile is using GET requests for all links in the application, so I got this small script to remove it from each link.
$('a').each(function () {
$(this).attr("data-ajax", "false");
});
But I have a pager in which I actually want to use AJAX. The pager link uses HttpPost request for a controller action. So I commented the above jQuery code so that I can actually use AJAX.
The problem is that when I click on the link there are two requests sent out, one is HttpGet - which is the jQuery Mobile AJAX default (which I don't want), and the second one is the HttpPost that I actually want to work. When I have the above jQuery code working, AJAX is turned off completely and it just goes to the URL and reloads the window.
I am using asp.net MVC 3. Thank you
Instead of disabling AJAX-linking, you can hijack clicks on the links and decide whether or not to use $.post():
$(document).delegate('a', 'click', function (event) {
//prevent the default click behavior from occuring
event.preventDefault();
//cache this link and it's href attribute
var $this = $(this),
href = $this.attr('href');
//check to see if this link has the `ajax-post` class
if ($this.hasClass('ajax-post')) {
//split the href attribute by the question mark to get just the query string, then iterate over all the key => value pairs and add them to an object to be added to the `$.post` request
var data = {};
if (href.indexOf('?') > -1) {
var tmp = href.split('?')[1].split('&'),
itmp = [];
for (var i = 0, len = tmp.length; i < len; i++) {
itmp = tmp[i].split('=');
data.[itmp[0]] = itmp[1];
}
}
//send POST request and show loading message
$.mobile.showPageLoadingMsg();
$.post(href, data, function (serverResponse) {
//append the server response to the `body` element (assuming your server-side script is outputting the proper HTML to append to the `body` element)
$('body').append(serverResponse);
//now change to the newly added page and remove the loading message
$.mobile.changePage($('#page-id'));
$.mobile.hidePageLoadingMsg();
});
} else {
$.mobile.changePage(href);
}
});
The above code expects you to add the ajax-post class to any link you want to use the $.post() method.
On a general note, event.preventDefault() is useful to stop any other handling of an event so you can do what you want with the event. If you use event.preventDefault() you must declare event as an argument for the function it's in.
Also .each() isn't necessary in your code:
$('a').attr("data-ajax", "false");
will work just fine.
You can also turn off AJAX-linking globally by binding to the mobileinit event like this:
$(document).bind("mobileinit", function(){
$.mobile.ajaxEnabled = false;
});
Source: http://jquerymobile.com/demos/1.0/docs/api/globalconfig.html
I can run this code in Android app (using PhoneGap adn jQuery Mobile) but not on desktop browsers.
It gives me a syntax error in firebug for this line =
var TicketList = eval("(" + ajax.responseText + ")");
Here is the code
// JScript source code
// ran on body load
function doJsStuff()
{
var ajax = AJAX();
ajax.onreadystatechange = function () {
if (ajax.readyState == 4) {
var TicketList = eval("(" + ajax.responseText + ")");
if (TicketList.ListCount > 0) {
document.getElementById("opencount").innerHTML = TicketList.ListCount +" Open Tickets";
for (Ticket in TicketList.Tickets) {
// add stuff to DOM
//AddTicketToList(TicketList.Tickets[Ticket]);
}
}
else {
document.getElementById("opencount").innerHTML = "All Tickets Reviewed";
DisplayNoresults();
}
}
}
ajax.open("GET", "http://website.com/ListTicketsRequest.ashx?PageNumber=1&PageSize=1&Status=Open", true);
ajax.send(null);
//document.addEventListener("deviceready", onDeviceReady, false);
//event to check for PhoneGap
//$('ul').listview('refresh');
$('#mtickets').page();
//showVars();
}
function AJAX()
{
var xmlHttp;
try
{
xmlHttp = new XMLHttpRequest();
}
catch (e)
{
}
return xmlHttp;
}
**TicketList is a variable in the JSon that comes across like this=
{"Tickets" : [{"TicketID": "1054","Category": "N/A","SubmittedUserID": "bob.thebuilder","ShortDescription": "test question QID:16668","CreationDate": "2/16/2011 12:24:19 PM","TicketStatus": "Open","LongDescription": "Something is wrong with this question I know I hve the right answer but it keeps telling me I'm wrong"},{"TicketID": "1053","Category": "Mission Support","SubmittedUserID": "dave","ShortDescription": "Make courseware revisions","CreationDate": "2/16/2011 9:34:48 AM","TicketStatus": "Open","LongDescription": "Find help tickets generated by users for possible courseware update."}], "PageCount": "6", "ListCount": "11"}
Note about PhoneGap If you are trying to include phoengap functions in a place where the code may also be executed on in a browser make sure you only add the phone gap function with on "deviceready" or your browser will not render. Example:
function onload(){
//event to check for PhoneGap
document.addEventListener("deviceready", onDeviceReady, true);
}
...
function onDeviceReady()
{
// Now PhoneGap API ready
vibrate(90); // vib to ack pg ready
$("a").click(function(event){
vibrate(30); // add 30 sec vib to all links
});
}
My immediate response would be to use jQuery's getJSON method, since you're aready using jQuery. jQuery's AJAX provides a much broader base of browser compatibility. Also, every time you use eval(), a small baby somewhere cries.
var url = "http://website.com/ListTicketsRequest.ashx?PageNumber=1&PageSize=1&Status=Open";
$.getJSON(url ,function(TicketList){
if (TicketList.ListCount > 0) {
$("#opencount").html(TicketList.ListCount +" Open Tickets");
for (Ticket in TicketList.Tickets) {
...
}
} else {
$("#opencount").html("All Tickets Reviewed");
DisplayNoresults();
}
});
If this still doesn't work for you, ensure that the JSON being returned is valid. But please stick to this method, and don't use eval!!
SIMPLIFIED UPDATE
var url = "http://website.com/ListTicketsRequest.ashx?PageNumber=1&PageSize=1&Status=Open";
$.getJSON(url ,function(AnyNameYouWant){
alert(AnyNameYouWant.ListCount + " Open Tickets");
});
UPDATE USING 'DATA'
If your url becomes too long, you might begin to encounter problems. It is suggested to pass the url data via the data argument.
var url = "http://website.com/ListTicketsRequest.ashx";
var data = "PageNumber=1&PageSize=1&Status=Open";
$.getJSON(url, data, function(AnyNameYouWant){
alert(AnyNameYouWant.ListCount + " Open Tickets");
});
Looking at your code, it seems likely to me that the syntax error isn't in the code you posted, but instead is contained in the JSON object you're evaluating in ajax.responseText. Take a look at the data being returned by the AJAX request. Is it valid Javascript? Does the page you're calling return something different to desktop browsers vs mobile? Is there an error message where the JSON code should be?
Another possibility: Is your app running on website.com? If not, Firefox is probably blocking the XMLHttpRequest from functioning properly. Firefox 3 and below block cross-site AJAX requests. Firefox 3.5 seems to allow some exceptions.
I am trying to use colorbox on a page where i have three links each of which have onclick event which call an ajax page and response text is shown in the necessary divs. everything is working fine except colorbox links. After i call the content through ajax the links are not working to appear the colorbox. Here is my code to call the colorbox which is when page is loaded working.
<p>
$(document).ready(
function()
{
$(".editchecklist").colorbox({width:"50%", height:"35%", iframe:true, onClosed:function(){ location.reload(true); } });
}
);
I tried to look for this problem but everything is related to jQuery ajax call not simple ajax call. The are advising to use .live() or rebind methods which i have no idea how and where should i use them.
here is my ajax call code:
function getxmlhttp()
{
var xmlHttp = false;
if (window.XMLHttpRequest)
{
// If IE7, Mozilla, Safari, etc: Use native object
var xmlHttp = new XMLHttpRequest();
}else
{
if (window.ActiveXObject)
{
// ...otherwise, use the ActiveX control for IE5.x and IE6
var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
function process_ajax2(phpPage, objID, getOrPost,clickedLink)
{
xmlhttp = getxmlhttp();
var obj = document.getElementById(objID);
if(getOrPost == "get")
{
xmlhttp.open("GET",phpPage);
xmlhttp.onreadystatechange = function()
{
if(xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
document.getElementById('change_'+clickedLink).innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}
}
Please tell me how would i solve this problem?
thanking you.
if I understand your question correctly, you've loaded content into the page via ajax after pageload.
The javascript that you've got is only going to work for data that is there on page load, so what you'd need to do is use .live() which will work on elements loaded at page load and after.
(note: I don't know what page you're trying to call here - so I am assuming it is in the link href)
Something like this should work
$(function(){
$(".editchecklist").live('click',function(e){
e.preventDefault();
$.colorbox({
width:"50%",
href:$(this).attr('href'),
height:"35%",
iframe:true,
onClosed:function(){
location.reload(true);
}
});
});
});
more on jquery live http://api.jquery.com/live/
Preface: I am sure this is incredibly simple, but I have searched this site & the jQuery site and can't figure out the right search term to get an answer - please excuse my ignorance!
I am adding additional form fields using jQuery's ajax function and need to then apply additional ajax functions to those fields but can't seem to get jQuery to monitor these on the fly form fields.
How can I get jQuery to use these new fields?
$(document).ready(function() {
$('#formField').hide();
$('.lnk').click(function() {
var t = this.id;
$('#formField').show(400);
$('#form').load('loader.php?val=' + t);
});
//This works fine if the field is already present
var name = $('#name');
var email = $('#email');
$('#uid').keyup(function () {
var t = this;
if (this.value != this.lastValue) {
if (this.timer) clearTimeout(this.timer);
this.timer = setTimeout(function () {
$.ajax({
url: 'loader.php',
data: 'action=getUser&uid=' + t.value,
type: 'get',
success: function (j) {
va = j.split("|");
displayname = va[1];
mail = va[2];
name.val(displayname);
email.val(mail);
}
});
}, 200);
this.lastValue = this.value;
}
});
});
So if the is present in the basic html page the function works, but if it arrives by the $.load function it doesn't - presumably because $(document).ready has already started.
I did try:
$(document).ready(function() {
$('#formField').hide();
$('.lnk').click(function() {
var t = this.id;
$('#formField').show(400);
$('#form').load('loader.php?val=' + t);
prepUid();
});
});
function prepUid(){
var name = $('#name');
var email = $('#email');
$('#uid').keyup(function () {
snip...........
But it didn't seem to work...
I think you are close. You need to add your keyup handler once the .load call is complete. Try changing this...
$('#form').load('loader.php?val=' + t);
prepUid();
To this...
$('#form').load('loader.php?val=' + t, null, prepUid);
What you are looking for is the jquery live function.
Attach a handler to the event for all elements which match the current selector, now or in the future
You can do something like this:
$('.clickme').live('click', function() {// Live handler called.});
and then add something using the DOM
$('body').append('<div class="clickme">Another target</div>');
When you click the div added above it will trigger the click handler as you expect with statically loaded dom nodes.
You can read more here: http://api.jquery.com/live/