Doing following in jQuery:
$('#signupbox1').on('click', '#signup1', function() {
var str = $('#signupform').serialize();
// make it look like a waiting button
$('#signup1').addClass("btn_wait");
var btn_val = $('#signup1').val();
$('#signup1').val('');
$.ajax({
type: "POST",
url: "signup_step1.php",
data: str,
success: function(msg) {
//doing stuff here
$('#signup1').removeClass("btn_wait");
$('#signup1').val(btn_val);
}
});
});
How could you disable the click event as well till you receive an answer from the ajax call? So, when you click on the button it not only "transforms" to a waiting button because of the added class, but also the click event will be "paused"... is this possible?
Thank you very much in advance!
$('#signupbox1').on('click', '#signup1', function() {
var str = $('#signupform').serialize();
// make it look like a waiting button
var btn_val = $('#signup1').val();
$('#signup1').addClass("btn_wait").val('').unbind('click');
$.ajax({
type: "POST",
url: "signup_step1.php",
data: str,
success: function(msg) {
$('#signup1').removeClass("btn_wait").val(btn_val);
},
complete: function() {
$('#signup1').bind('click'); // will fire either on success or error
}
});
});
You can add a flag to denote "currently loading". You can use anything like a variable, property or attribute. In this example, I use jQuery .data()
Also, it's advisable that you use submit event instead of adding a click handler to the submit button when you submit a form.
$('#signupform').on('submit', function() {
var form = $(this),
loading = form.data('loading'), //check loading status
str, button, val;
//if not loading
if(!loading){
//set loading to true
form.data('loading',true);
str = form.serialize();
button = $('#signup1', form);
val = button.val();
// make it look like a waiting button
button
.addClass("btn_wait");
.val('');
$.ajax({
type: "POST",
url: "signup_step1.php",
data: str,
success: function(msg) {
//remove loading state
form.data('loading',false);
//return button to normal
button
.removeClass("btn_wait");
.val(val);
}
});
}
});
Related
I am learning jquery and i am stuck with a problem. Here is the code
$(function(){
var gotProducts=new Array();
var productsWithDelete=new Array();
$('.addProducts').on('keyup',function(event) {
var searchVal=$(this).val().trim();
if(searchVal.length > 0) {
$.ajax({
url: 'http://localhost/url',
data: { products: $(this).val(), },
type: 'POST',
dataType: 'html',
success: function(msg) {
$('#printTheProducts').html(msg);
}
});
}
});
$('.productsButton').click(function() {
alert('yes');
});
});
The response I am getting from the ajax call is a button having class productsButton.
Now when i try to click that button I got through ajax then it does not alert yes. I mean it does nothing.
Question:-
What might be the problem?
Try event delegation using .on() for generated button, As they are generated dynamically
$('#printTheProducts').on('click','.productsButton',function(){
alert('yes');
});
Where #printTheProducts is the closest parent element, you can use document or document.body also as a selector!
Syntax:
$(closestparentelement).on('event','targetselector',function(){
});
I have this link:
$('.popup-window').click(function (e) {
e.preventDefault();
$.ajax({
...
})
});
which is a .NET LinkButton (a link that call a javascript, not a real href). I want to prevent Default if ajax return some (let say, false). Else, if true, continue with that link handler.
How can I do it?
P.S. I need that e.preventDefault(); at the beginning, else .NET handler will act immediatly.
You can use the __doPostBack() js function to trigger the postback in your AJAX callback.
The only thing is that you need to pass in the id of the control causing the postback, e.g.
__doPostBack('btnPopup', null);
you can see more on this function in this question: How to use __doPostBack()
I think I understand what you're looking for.
Here's my idea on it: use a data attribute on the DOM element to decide weither default event should be prevented or not. Initially, the event is prevented but the ajax has the power to "unlock?" it, then fire it again. It's a little bit of custom work but it may do the trick:
var $popupWindow=$('popup-window');
// initially "tell" the LinkButton to prevent default
$popupWindow.data('prevent-default', 1);
// the click event (initially prevents default)
$popupWindow.click(function(e){
var $this=$(this);
if ($this.data('prevent-default')==0) { // if "unlocked"
// "lock" it again (default isn't prevented)
$this.data('prevent-default', 1);
} else { // if "locked"
// default is prevented
e.preventDefault();
// test if it should be unlocked
$.ajax({
// ...
}).done(function(data){
if (data.length>0 && data.response==false) {
// set the attribute so it shouldn't prevent default
$this.data('prevent-default', 0);
// trigger this click (should let the event fire completely)
$this.trigger('click');
}
});
}
});
UPDATE:
An alternative could be to add a Page Method.
(See: Using jQuery to directly call ASP.NET AJAX page methods)
This would reduce the mechanics to somethink like this:
$('popup-window').click(function(e){
e.preventDefault();
$.ajax({
// ...
}).done(function(data){
if (data.length>0 && data.response==false) {
$.ajax({
type: "POST",
url: "YourPage.aspx/YourMethod",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
// Replace the div's content with the page method's return.
$("#Result").text(msg.d);
}
});
}
});
});
$('.popup-window').click(function (e) {
data = '?sample=1' //serialized data here
callback = function(json){
if(json.returnVar!=true){ //check if returnVar is not true
e.preventDefault(); //prevent redirect if not true
}
};
$.ajax({
type: 'POST',
url: "../ajaxcall.php", //the url to call for ajax here
data: data,
success: callback,
dataType: 'json'
});
});
Try this, let me know if you can't understand the code
I was working on a simple form page and I was wondering what happens if someone clicks the submit button many many times (incase my shared hosting somehow seems to be slow at that time).
Also, incase anyone wants to look at my code
$.ajax({
url: "submit.php",
type: 'POST',
data: form,
success: function (msg) {
$(".ressult").html("Thank You!");
},
error: function () {
$(".result").html("Error");
}
});
Is there a way to make it so after the user clicks it once, it won't run it again until the first click is done?
Thank you
You can use jQuery's .one() function:
(function handleSubmit() {
$('#submitBtn').one('click', function() {
var $result = $('.result');
$.ajax({
url: 'submit.php',
type: 'POST',
data: form,
success: function (msg) {
$result.html('Thank You!');
handleSubmit(); // re-bind once.
},
error: function () {
$result.html('Error');
}
}); // End ajax()
}); // End one(click)
}()); // End self-invoked handleSubmit()
*Edit: * Added recursion for multiple submissions.
Use a boolean flag
if (window.isRunning) return;
window.isRunning = true;
$.ajax({
url:"submit.php",
type: 'POST',
data: form,
success: function (msg){
$(".ressult").html("Thank You!");
},
error: function (){
$(".result").html("Error");
},
complete : function () {
window.isRunning = false;
}
});
var $button = $(this);
$button.prop('disabled', true); // disable the button
$.ajax({
url:"submit.php",
type: 'POST',
data: form,
success: function (msg){
$(".ressult").html("Thank You!");
},
error: function (){
$(".result").html("Error");
},
complete: function() {
$button.prop('disabled', false); // enable it again
}
});
Have you considered replacing your submit button with a loader image while the query executes, then re-adding it once the query is complete?
EDIT: Using the loader image is a sort of universal "I'm doing something" indicator, but disabling the button would work too!
You could disable the submit button, before the ajax call is made. And then, if required, enable it on success.
I have some jquery that looks like this,
$('.career_select .selectitems').click(function(){
var selectedCareer = $(this).attr('title');
$.ajax({
type: 'POST',
url: '/roadmap/step_two',
data: 'career_choice='+selectedCareer+"&ajax=true&submit_career=Next",
success: function(html){
$('.hfeed').append(html);
$('#grade_choice').SelectCustomizer();
}
});
});
My problem is that if the user keeps clicking then the .hfeed keeps getting data appended to it. How can I limit it so that it can only be clicked once?
Use the one function:
Attach a handler to an event for the elements. The handler is executed at most once per element
If you wanted the element to only be clicked once and then be re-enabled once the request finishes, you could:
A) Keep a state variable that updates if a request is currently in progress and exits at the top of the event if it is.
B) Use one, put your code inside a function, and rebind upon completion of request.
The second option would look like this:
function myClickEvent() {
var selectedCareer = $(this).attr('title');
var that = this;
$.ajax({
type: 'POST',
url: '/roadmap/step_two',
data: 'career_choice='+selectedCareer+"&ajax=true&submit_career=Next",
success: function(html){
$('.hfeed').append(html);
$('#grade_choice').SelectCustomizer();
},
complete: function() {
$(that).one('click', myClickEvent);
}
});
}
$('.career_select .selectitems').one('click', myClickEvent);
You can either use a global variable like
var added = false;
$('.career_select .selectitems').click(function(){
if(!added) {
// previous code here
added = true;
}
});
or use .one("click", function () { ... }) instead of the previous click function to execute the handler at most once per element. See http://api.jquery.com/one/ for more details.
Right now it contacts the server every time a user toggles "Comments (X)"
I'd like to make it so as soon as a user clicks ".info .reply" (Comments (X)), an ajax loader appears just until the data is finished loading, then the loader disappears.
// Replies - Toggle display of comments
$('.info .reply').click( function() {
$('.reply', this.parentNode.parentNode).toggle();
return false;
});
// Load comments
$('.info .reply', this).mousedown( function() {
var id = $('form #id', this.parentNode.parentNode).val();
$.ajax({ url: location.href, type: 'post', data: 'id=' + id, dataType: 'json',
success: function(data) {
for (var i in data) {
// Do AJAX Updates
}
}
});
return false;
});
What's the proper way to do this?
Thanks!
Basically
Show the image on mousedown using show() or fadeIn() or whatever tickles your fancy, then hide it inside your success callback. Like this
$('.info .reply', this).mousedown( function() {
$("#loading-image").show(); // Show the progress indicator
var id = $('form #id', this.parentNode.parentNode).val();
$.ajax({ url: location.href, type: 'post', data: 'id=' + id, dataType: 'json',
success: function(data) {
$("#loading-image").hide(); // Hide the progress indicator
for (var i in data) {
// Do AJAX Updates
}
}
});
return false;
});
You can use a plugin such as jQuery BlockUI to do this. Just call $.blockUI() before calling $.ajax. Then at the end of the success event, call $.unblockUI().