I got a problem while scrolling down and load content into my page.
The ajax executions load too fast, so the second, third and so... does not get correct information from the first ajax call, which are loaded into the DOM.
How do I make it, so the script only run if last ajax call is done and a success.
It should skip every scrolling up and down until the last ajax call is done. And then the ajax is allow to be executed.
And then over and over again until there no more to load though ajax.
Here is my jQuery script.
<script type="text/javascript">
$(document).ready(function(){
$(window).scroll(function(){
if ($(window).scrollTop() <= $(".wrapper_ac").offset().top + $(".wrapper_ac").height()) {
$(document).ajaxStart(function () {
var ajaxURLvalue = '../../modules/language_text_loading/load_content.php';
var langID = 'x';
var onID = 'x';
var setLimit = 'x';
var setIn = 'after';
var theme = 'x';
var setInWhere = 'x';
var conID = 'x';
loadInstant(ajaxURLvalue, langID, onID, setLimit, setIn, theme, setInWhere, conID);
});
}
});
});
</script>
This is my function.
function loadInstant(ajaxURLvalue, langID, onID, setLimit, setIn, theme, setInWhere, conID) {
var temp_s = $(".ltlID:last").attr("id");
var split_ltlID = temp_s.split(':');
var ltlID = split_ltlID[0];
var acContentBoxID = split_ltlID[1];
var dataString = {
action: 'load',
last_ltlID: ltlID,
//sharedID:acContentBoxID_sharedID,
langID:langID,
setInWhere: setInWhere,
onID:onID,
theme:theme,
conID:conID
};
$.ajax({
type: "POST",
url: ajaxURLvalue,
data: dataString,
cache: false,
success: function(html){
$("#accordionContent"+acContentBoxID+":last").after(html);
});
};
Thank you for your help.
Well what I would do is store the ajax function into a global variable like this:
global_variable = $.ajax({
type: "POST",
url: ajaxURLvalue,
data: dataString,
cache: false,
success: function(html){
$("#accordionContent"+acContentBoxID+":last").after(html);
});
and before the ajax call check if the variable is tru like this:
if(global_variable){
return false;
}
this will stop any ajax call to be called before the one running is over. I hope it helps you!
Related
I'm trying to call an AJAX query and have had lots of trouble recently.
Im trying to call a api that I have custom made myself, it displays this when the url api/reverse/test - tset (is just uses a php function to reverse the text given in the slug3.
That function works fine, just wanted to give some back on what gets requested.
reverse.php - HTML File
<textarea id="input"></textarea>
<div id="output">
</div>
index.js - All of my jQuery and AJAX
$(document).ready(function(){
var $input = $('#input');
var $output = $('#output');
$input.on('keyup', function(){
var text = $input.val();
var url = 'http://coder.jekoder.com/api/?area=reverse&text='+text;
$.ajax({
type: 'GET',
url: url,
dataType: 'text',
success: function(data) { var output = data; },
error: alert('fail')
}) // End of AJAX
$output.html = output;
});
});
api.php - PHP file being called
<?php
$area = $_GET['area'];
if ($area == 'reverse') {
if (isset($_GET['text']) ) $text = $_GET['text'];
else $text = 'Hello';
echo strrev($text);
}
It's then supposed to take the output variable and display that in a div but that's not the main thing that matters.
error removed - was trying to see if it fixed it
There are several issue I found:
Jquery:
var text = $('#input').val(); // if you are getting value from any inputbox - get value using .val() function
var url = 'http://localhost/test.php?data='+text; // pass data like this ?data='+text
// AJAX START
$.ajax({
type: 'GET',
url: url,
dataType: 'text',
async: true,
success: function(data) { var output = data; alert(output)},
error: function(data) { alert('fail') }
});
In php you ca get data like this:
echo $_GET['data'];
exit;
Try this. Scope of variable output is within the success call and you are using it outside the ajax call.
$(document).ready(function()
{
var $input = $('#input');
var $output = $('#output');
$input.on('keyup', function()
{
var text = $input.val();
var url = 'http://coder.jekoder.com/api/?area=reverse&text='+text;
$.ajax({
type: 'GET',
url: url,
dataType: 'text',
success: function(data) { var output = data; $output.html = output;},
error: alert('fail')
}) // End of AJAX
});
});
I'm trying to use setInterval to execute the php script update.php every 10 seconds and refresh div id = verification. For some reason setInterval is preventing the script from functioning. Any suggestions on where to place\change setInterval would be appreciate as I'm stumped (sorry entry level javascript user here). For clarity I omitted all the non-relevant details, such as vars.
<div id="verification"></div>
<script id="verification" language="javascript" type="text/javascript">
$(function() {
$.ajax({
url: 'update.php', //php
data: "", //the data "caller=name1&&callee=name2"
dataType: 'json', //data format
success: function(data) //on receive of reply
{
var foobar = data[2]; //foobar
$('#verification').html("(<b>" + foobar + "</b>)"); //output to html
}
});
});
setInterval(10000); //every 5 secs
</script>
Suggestions/Steps/Bugs:
Create a separate function to perform ajax request
Call this function on page load to run it when page is loaded
Use setInterval() to call the function every n seconds
id should always be unique. You're now using verification as if for <div> and <script>
You can remove id and language attributes of <script>. Those are not required.
Code:
function update() {
$.ajax({
url: 'update.php', //php
data: "", //the data "caller=name1&&callee=name2"
dataType: 'json', //data format
success: function (data) {
//on receive of reply
var foobar = data[2]; //foobar
$('#verification').html("(<b>" + foobar + "</b>)"); //output to html
}
});
}
$(document).ready(update); // Call on page load
// ^^^^^^
setInterval(update, 10000); //every 10 secs
// ^^^^^^
setInterval() takes a function (that it should execute) as it's first argument.
Try this:
setInterval(function(){
$.ajax({
url: 'update.php', //php
data: "", //the data "caller=name1&&callee=name2"
dataType: 'json', //data format
success: function(data) //on receive of reply
{
var foobar = data[2]; //foobar
$('#verification').html("(<b>"+foobar+"</b>)"); //output to html
}
});
}, 10000);
you are using setInterval in a wrong way - you can read about it here:
http://www.w3schools.com/js/js_timing.asp
Also please notice that AJAX calls are asynchronous - when program is going forward it doesn't mean that previous AJAX call has ended. You can "wait" for AJAX completition using some jQuery mechanisms like binding ajaxComplete or using when
You are missing the function block:
setInterval(function() {
// to do
}, 5000);
My suggestion is to go for setTimeout as you are running ajax it is not certain that it would complete within 5 seconds. In case if you wana go for it:
var dispatchUpdates = function() {
setTimeout(pullUpdates, 5000);
};
var pullUpdates = function() {
$.ajax({
url: 'update.php',
data: "",
dataType: 'json',
success: function(data) {
var foobar = data[2];
$('#verification').html("(<b>" + foobar + "</b>)");
dispatchUpdates(); // next updates
},
error: function() {
dispatchUpdates(); // retry
}
});
};
$(dispatchUpdates); //page load
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
I have a javascript function that is called when the user clicks on a button and performs an AJAX query that adds some data to my database. However, I've been getting complaints that a lot of data hasn't been getting through, and I've isolated the problem to be the time between clicks. When they wait long enough between clicks, the data always gets through, but if they don't wait long enough it's a crapshoot.
So I'm pretty much settled that the problem is that the javascript function is being called again while it is already running, which I shouldn't allow. Is there a way I can lock the user's browser at the beginning of the function and unlock it at the end after the AJAX? I know this may irritate my users, but I can't see any other solution.
It's not totally necessary, but here's what my javascript function looks like:
function addtolist(thisform, sdata)
{
var scntDiv = $('#p_data');
var request = $.ajax({ async: false, url: "php_addtolist.php", type: "POST", data: {data:sdata}, dataType: "html" });
request.done(function(msg) { outdata = parseInt(msg); });
$(outdata).appendTo(scntDiv);
}
You can disable the button when the function is called, then re-enable it with the complete callback:
function addtolist(thisform, sdata)
{
$('#submit_btn').prop('disabled', true);
var scntDiv = $('#p_data');
var request = $.ajax({
async: false,
url: "php_addtolist.php",
type: "POST",
data: {data:sdata}, dataType: "html" },
complete: function() { $('#submit_btn').prop('disabled', false); }
);
request.done(function(msg) { outdata = parseInt(msg); });
$(outdata).appendTo(scntDiv);
}
Basically it seems like the outdata is async. the following should resolve.
function addtolist(thisform, sdata)
{
var scntDiv = $('#p_data');
var request = $.ajax({ async: false, url: "php_addtolist.php", type: "POST", data: {data:sdata}, dataType: "html" });
request.done(function(msg) {
outdata = parseInt(msg);
$(outdata).appendTo(scntDiv);
});
}
I have this small jquery script that does not work if I remove the 'async:false' part... And I don't understand why (the alert() part is there just to check if it works or not). My guess was it would work asynchronously but it just doesn't. Can somebody explain to me why? And what should I change to make it async?
$(document).ready(function(){
var artistName = new Array();
var artistPlaycount = new Array();
$('#inputForm').submit(function(){
var userName = $('#username').attr('value');
var amount = $('#amount').attr('value');
userName = "someUsername";
$.ajax({
type: "POST",
url: "prepXML.php",
data: "method=getartists&user="+userName+"&amount="+amount,
dataType: "xml",
async:false,
success: function(xml){
var i = 0;
$("artist",xml).each(function(){
artistName[i] = $(this).find("name").text();
artistPlaycount[i] = $(this).find("playcount").text();
i++;
});
}
});
});
alert(artistName[2]); //or any other iteration number
});
thank you
To do this asynchronously you need to move the alert into the callback and remove the async option, like this:
$.ajax({
type: "POST",
url: "prepXML.php",
data: "method=getartists&user="+userName+"&amount="+amount,
dataType: "xml",
success: function(xml){
$("artist",xml).each(function(i){
artistName[i] = $(this).find("name").text();
artistPlaycount[i] = $(this).find("playcount").text();
});
alert(artistName[2]);
}
});
Otherwise that success function populating the array happens after the alert does...so what you want isn't quite there yet. Not until the request comes back from the server does the success handler execute.
Also, the first parameter to the .each() callback is the index, you can use it, no need to keep your own incrementing variable :)
It doesn't work because the callback is fired after the alert. Put the alert in the callback.
you need to move the alert into your success handler.
alert(artistName[2]); //or any other iteration number
should go right after you loop through the xml.
so you should have:
success: function(xml){
var i = 0;
$("artist",xml).each(function(){
artistName[i] = $(this).find("name").text();
artistPlaycount[i] = $(this).find("playcount").text();
i++;
});
alert(artistName[2]); //or any other iteration number
}
I am using jQuery to insert an HTML shell into a page, and populate the shell with XML. Here is the XML in question
<minorPropCategory title="Test Title 1">
<minorProp>FLV</minorProp>
<minorProp>BLV</minorProp>
<minorProp>RLV</minorProp>
</minorPropCategory>
<minorPropCategory title="Test Title 2">
<minorProp>LAS</minorProp>
<minorProp>ILV</minorProp>
<minorProp>BIL</minorProp>
</minorPropCategory>
So first, what I do is import an HTML snippet for each minorPropCategory, and add the title using this code
$(xml).find('minorPropCategory').each(function(){
var minorHeader=$(this).attr("title");
var minorId=$(this).attr("title").replace(/ /g,'');
var minorModuleContainerCode = "minorModuleContainer.html";
//names the div with a unique ID
minorDiv = $("<div id='"+minorId+"minorModuleContainer' class='minorModuleGroupContainer'>");
//Sets loading message in case it takes longer than usual to load
minorDiv.html("Loading......");
//After minorModuleContainerCode.html code loads, starts populating module
minorDiv.load(minorModuleContainerCode,"t",
function(){
$("#"+minorId+"minorModuleContainer").find(".minorModuleHeader").html(minorHeader);
}
);
$("#minorModuleContainer").append(minorDiv);
Then, what I want to do is add another HTML snippet, and then populate it. This is where I am having a problem. I can try it like this
//Create the actual minor modules
$(this).find('minorProp').each(function(){
var minorPropCode = $(this).text();
var minorModuleCode = "minorModule.html";
minorModuleDiv = $("<div id='"+minorPropCode+"minorModule' class='minorModule'>");
minorModuleDiv.html("Loading......");
minorModuleDiv.load(minorModuleCode,"b",
function(){
$.ajax({
type: "GET", url: minorPropCode+".xml", dataType: "xml",
success: function(xml3) {
$("#"+minorPropCode+"minorModule").find(".minorPropLogo").attr(
{
src:$(xml3).find('smallImage').text(),
alt:$(xml3).find('smallImageAlt').text()
}
);
}
});
});
$("#"+minorId+"minorModuleContainer").append(minorModuleDiv);
});
});
But it never shows up on the page, because I don't think it is firing at the proper time. Alternatively, I tried moving the creation of the minor modules into the .load function of it's parent, but I run into another problem. The code looks like this.
//MINOR MODULE CODE
$(xml).find('minorPropCategory').each(function(){
var minorHeader=$(this).attr("title");
var minorId=$(this).attr("title").replace(/ /g,'');
var minorModuleContainerCode = "minorModuleContainer.html";
//names the div with a unique ID
minorDiv = $("<div id='"+minorId+"minorModuleContainer' class='minorModuleGroupContainer'>");
//Sets loading message in case it takes longer than usual to load
minorDiv.html("Loading......");
//After minorModuleContainerCode.html code loads, starts populating module
minorDiv.load(minorModuleContainerCode,"t",
function(){
$("#"+minorId+"minorModuleContainer").find(".minorModuleHeader").html(minorHeader);
$(this).find('minorProp').each(function(){
alert("minorPropFired");
var minorPropCode = $(this).text();
var minorModuleCode = "minorModule.html";
minorModuleDiv = $("<div id='"+minorPropCode+"minorModule' class='minorModule'>");
minorModuleDiv.html("Loading......");
minorModuleDiv.load(minorModuleCode,"b",
function(){
$.ajax({
type: "GET", url: minorPropCode+".xml", dataType: "xml",
success: function(xml3) {
alert("test");
$("#"+minorPropCode+"minorModule").find(".minorPropLogo").attr(
{
src:$(xml3).find('smallImage').text(),
alt:$(xml3).find('smallImageAlt').text()
}
);
}
});
});
$("#"+minorId+"minorModuleContainer").append(minorModuleDiv);
});
The problem is, that the line with "$(this).find('minorProp').each(function(){" doesn't fire because "this" has changed. I guess, by now, my noob is showing. I feel like I am doing this in the wrong way. Any help would be appreciated. Thanks.
Posted below is the full .js file of what I am trying to do.
// JavaScript Document<script language="JavaScript" type="text/javascript">
$(document).ready(function(){
//gets the code for the ad from the URL. Using URL jQuery add-on to make this super-easy
var adCode = $.url.param("adCode");
if (adCode != null){
//gets the ad code's XML file
$.ajax({
type: "GET", url: adCode+".xml", dataType: "xml",
success: function(xml) {
//Set the header image
$("#headerImg").attr(
{
src:$(xml).find('headerImage').text(),
alt:$(xml).find('headerImageAlt').text()
}
);
//set the header text
$("#headerText").html($(xml).find('adText').text());
//set the top image
$("#topImg").attr(
{
src:$(xml).find('topImage').text(),
alt:$(xml).find('topImageAlt').text()
}
);
//MAJOR MODULE CODE - This code reads all of the major modules, then adds a majorModule div, and populates it
//Gets all majorProps from ad XML
$(xml).find('majorProp').each(function(){
var propCode=$(this).text();
var majorModuleCode = "majorModule.html";
//names the div with a unique ID
div = $("<div id='"+propCode+"majorModule' class='majorModule'>");
//Sets loading message in case it takes longer than usual to load
div.html("Loading......");
//After majorModule.html code loads, starts populating module
div.load(majorModuleCode,"t",
function(){
//Get the XML for the prop, which contains prop specific stuff
$.ajax({
type: "GET",
url: propCode+".xml",
dataType: "xml",
success: function(xml2) {
$("#"+propCode+"majorModule").find(".propImg").attr(
{
src:$(xml2).find('smallImage').text(),
alt:$(xml2).find('smallImageAlt').text()
}
);
$("#"+propCode+"majorModule").find(".propLogoImg").attr(
{
src:$(xml2).find('smallLogo').text(),
alt:$(xml2).find('name').text()
}
);
$("#"+propCode+"majorModule").find(".viewCalendarLinkA").attr(
{
href:"https://www.harrahs.com/AvailabilityCalendar.do?propCode="+propCode+"&showHotDeal=Y"
}
);
$("#"+propCode+"majorModule").find(".learnMoreLinkA").attr(
{
href:$(xml2).find('homeLink').text()
}
);
$("#"+propCode+"majorModule").find(".propText").html(
$(xml2).find('bodyText').text()
);
}
});
//Get the lowest rate for the prop
$.ajax({
type: "GET",
url: "lowest_rate\\"+propCode+".xml",
dataType: "xml",
success: function(xml3) {
$("#"+propCode+"majorModule").find(".roomRate").html(
"$"+($(xml3).find('roomtype').filter(
function (index) {
return $(this).attr("lowest") == "Y";
}).text()).slice(0, -3)
)
}
});
}
);
$("#mainModuleContainer").append(div);
});
//MINOR MODULE CODE
$(xml).find('minorPropCategory').each(function(){
var minorHeader=$(this).attr("title");
var minorId=$(this).attr("title").replace(/ /g,'');
var minorModuleContainerCode = "minorModuleContainer.html";
//names the div with a unique ID
minorDiv = $("<div id='"+minorId+"minorModuleContainer' class='minorModuleGroupContainer'>");
//Sets loading message in case it takes longer than usual to load
minorDiv.html("Loading......");
//After minorModuleContainerCode.html code loads, starts populating module
minorDiv.load(minorModuleContainerCode,"t",
function(){
$("#"+minorId+"minorModuleContainer").find(".minorModuleHeader").html(minorHeader);
}
);
$("#minorModuleContainer").append(minorDiv);
//Create the actual minor modules
$(this).find('minorProp').each(function(){
var minorPropCode = $(this).text();
var minorModuleCode = "minorModule.html";
minorModuleDiv = $("<div id='"+minorPropCode+"minorModule' class='minorModule'>");
minorModuleDiv.html("Loading......");
minorModuleDiv.load(minorModuleCode,"b",
function(){
$.ajax({
type: "GET", url: minorPropCode+".xml", dataType: "xml",
success: function(xml3) {
$("#"+minorPropCode+"minorModule").find(".minorPropLogo").attr(
{
src:$(xml3).find('smallImage').text(),
alt:$(xml3).find('smallImageAlt').text()
}
);
}
});
});
$("#"+minorId+"minorModuleContainer").append(minorModuleDiv);
});
});
}
});
}
});
To fix this problem just before running minorDiv.load do something like this
var elem = $(this);
minorDiv.load(minorModuleContainerCode,"t", function(){
$("#"+minorId+"minorModuleContainer").find(".minorModuleHeader").
html(minorHeader);
// replace $(this) with elem here
elem.find('minorProp').each(function(){
...
}
...
}
This will keep the reference to correct object in your nested functions.