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Change behavior of button using AJAX

I'm trying to figure out how to change behaviour of a button using AJAX.
When the button is clicked, it means that user confirmed order recently created. AJAX calls /confirm-order/<id> and if the order has been confirmed, I want to change the button to redirect to /my-orders/ after next click on it. The problem is that it calls again the same JQuery function. I've tried already to remove class="confirm-button" attribute to avoid JQuery again but it does not work. What should I do?
It would be enough, if the button has been removed and replaced by text "Confirmed", but this.html() changes only inner html which is a text of the button.
$(document).ready(function () {
$(".confirm-button").click(function (b) {
b.preventDefault();
var $this = $(this);
var id = this.value;
var url = '/confirm-order/'+id;
$.ajax({
type: 'get',
url: url,
success: function (data) {
$this.empty();
$this.attr('href','/my-orders/');
$this.parent().attr("action", "/my-orders/");
$this.html('Confirmed');
}
})
});
});

The event handler will be still attached to the button, so this will run again:
b.preventDefault();
which will prevent the default, which is opening the href. You need to remove the event handler on success. You use the jQuery #off() method:
$(".confirm-button").off('click');
or more shortly:
$this.off('click');

You can add to your success function something like: $this.data('isConfirmed', true);
And then in your click handler start by checking for it. If it's true, redirect the user to the next page.
$(".confirm-button").click(function (b) {
b.preventDefault();
var $this = $(this);
if ($this.data('isConfirmed')) {
... redirect code ...
}
else {
... your regular code ...
}
}

You need to use .on() rather than .click() to catch events after the document is ready, because the "new" button appears later.
See http://api.jquery.com/on/
$(document).ready(function() {
$('.js-confirm').click(function(){
alert('Confirmed!');
$(this).off('click').removeClass('js-confirm').addClass('js-redirect').html('Redirect');
});
$(document).on('click', '.js-redirect', function(){
alert('Redirecting');
});
});
<button class="js-confirm">Confirm</button>

Trigger AJAX inside an AJAX loaded page [duplicate]

I have a link, myLink, that should insert AJAX-loaded content into a div (appendedContainer) of my HTML page. The problem is that the click event I have bound with jQuery is not being executed on the newly loaded content which is inserted into the appendedContainer. The click event is bound on DOM elements that are not loaded with my AJAX function.
What do I have to change, such that the event will be bound?
My HTML:
<a class="LoadFromAjax" href="someurl">Load Ajax</a>
<div class="appendedContainer"></div>
My JavaScript:
$(".LoadFromAjax").on("click", function(event) {
event.preventDefault();
var url = $(this).attr("href"),
appendedContainer = $(".appendedContainer");
$.ajax({
url: url,
type : 'get',
complete : function( qXHR, textStatus ) {
if (textStatus === 'success') {
var data = qXHR.responseText
appendedContainer.hide();
appendedContainer.append(data);
appendedContainer.fadeIn();
}
}
});
});
$(".mylink").on("click", function(event) { alert("new link clicked!");});
The content to be loaded:
<div>some content</div>
<a class="mylink" href="otherurl">Link</a>

Use event delegation for dynamically created elements:
$(document).on("click", '.mylink', function(event) {
alert("new link clicked!");
});
This does actually work, here's an example where I appended an anchor with the class .mylink instead of data - http://jsfiddle.net/EFjzG/

If the content is appended after .on() is called, you'll need to create a delegated event on a parent element of the loaded content. This is because event handlers are bound when .on() is called (i.e. usually on page load). If the element doesn't exist when .on() is called, the event will not be bound to it!
Because events propagate up through the DOM, we can solve this by creating a delegated event on a parent element (.parent-element in the example below) that we know exists when the page loads. Here's how:
$('.parent-element').on('click', '.mylink', function(){
alert ("new link clicked!");
})
Some more reading on the subject:
https://learn.jquery.com/events/event-delegation/
http://jqfundamentals.com/chapter/events

if your question is "how to bind events on ajax loaded content" you can do like this :
$("img.lazy").lazyload({
effect : "fadeIn",
event: "scrollstop",
skip_invisible : true
}).removeClass('lazy');
// lazy load to DOMNodeInserted event
$(document).bind('DOMNodeInserted', function(e) {
$("img.lazy").lazyload({
effect : "fadeIn",
event: "scrollstop",
skip_invisible : true
}).removeClass('lazy');
});
so you don't need to place your configuration to every you ajax code

As of jQuery 1.7, the .live() method is deprecated. Use .on() to attach event handlers.
Example -
$( document ).on( events, selector, data, handler );

For those who are still looking for a solution , the best way of doing it is to bind the event on the document itself and not to bind with the event "on ready"
For e.g :
$(function ajaxform_reload() {
$(document).on("submit", ".ajax_forms", function (e) {
e.preventDefault();
var url = $(this).attr('action');
$.ajax({
type: 'post',
url: url,
data: $(this).serialize(),
success: function (data) {
// DO WHAT YOU WANT WITH THE RESPONSE
}
});
});
});

If your ajax response are containing html form inputs for instance, than this would be great:
$(document).on("change", 'input[type=radio][name=fieldLoadedFromAjax]', function(event) {
if (this.value == 'Yes') {
// do something here
} else if (this.value == 'No') {
// do something else here.
} else {
console.log('The new input field from an ajax response has this value: '+ this.value);
}
});

use jQuery.live() instead . Documentation here
e.g
$("mylink").live("click", function(event) { alert("new link clicked!");});

For ASP.NET try this:
<script type="text/javascript">
Sys.Application.add_load(function() { ... });
</script>
This appears to work on page load and on update panel load
Please find the full discussion here.

Important step for Event binding on Ajax loading content...
01. First of all unbind or off the event on selector
$(".SELECTOR").off();
02. Add event listener on document level
$(document).on("EVENT", '.SELECTOR', function(event) {
console.log("Selector event occurred");
});

Here is my preferred method:
// bind button click to function after button is AJAX loaded
$('#my_button_id').bind('click', function() {
my_function(this);
});
function my_function () {
// do stuff here on click
}
I place this code right after the AJAX call is complete.

I would add one point that was NOT obvious to me as a JS newb - typically your events would be wired within document, e.g.:
$(function() {
$("#entcont_table tr td").click(function (event) {
var pk = $(this).closest("tr").children("td").first().text();
update_contracts_details(pk);
});
}
With event delegation however you'd want:
$(function() {
// other events
}
$("#entcont_table").on("click","tr td", function (event) {
var pk = $(this).closest("tr").children("td").first().text();
update_contracts_details(pk);
});
If your event delegation is done within the document ready, you'll an error of the like:
cant assign guid on th not an boject

How to bind Events on Ajax loaded Content?

I have a link, myLink, that should insert AJAX-loaded content into a div (appendedContainer) of my HTML page. The problem is that the click event I have bound with jQuery is not being executed on the newly loaded content which is inserted into the appendedContainer. The click event is bound on DOM elements that are not loaded with my AJAX function.
What do I have to change, such that the event will be bound?
My HTML:
<a class="LoadFromAjax" href="someurl">Load Ajax</a>
<div class="appendedContainer"></div>
My JavaScript:
$(".LoadFromAjax").on("click", function(event) {
event.preventDefault();
var url = $(this).attr("href"),
appendedContainer = $(".appendedContainer");
$.ajax({
url: url,
type : 'get',
complete : function( qXHR, textStatus ) {
if (textStatus === 'success') {
var data = qXHR.responseText
appendedContainer.hide();
appendedContainer.append(data);
appendedContainer.fadeIn();
}
}
});
});
$(".mylink").on("click", function(event) { alert("new link clicked!");});
The content to be loaded:
<div>some content</div>
<a class="mylink" href="otherurl">Link</a>

Use event delegation for dynamically created elements:
$(document).on("click", '.mylink', function(event) {
alert("new link clicked!");
});
This does actually work, here's an example where I appended an anchor with the class .mylink instead of data - http://jsfiddle.net/EFjzG/

If the content is appended after .on() is called, you'll need to create a delegated event on a parent element of the loaded content. This is because event handlers are bound when .on() is called (i.e. usually on page load). If the element doesn't exist when .on() is called, the event will not be bound to it!
Because events propagate up through the DOM, we can solve this by creating a delegated event on a parent element (.parent-element in the example below) that we know exists when the page loads. Here's how:
$('.parent-element').on('click', '.mylink', function(){
alert ("new link clicked!");
})
Some more reading on the subject:
https://learn.jquery.com/events/event-delegation/
http://jqfundamentals.com/chapter/events

if your question is "how to bind events on ajax loaded content" you can do like this :
$("img.lazy").lazyload({
effect : "fadeIn",
event: "scrollstop",
skip_invisible : true
}).removeClass('lazy');
// lazy load to DOMNodeInserted event
$(document).bind('DOMNodeInserted', function(e) {
$("img.lazy").lazyload({
effect : "fadeIn",
event: "scrollstop",
skip_invisible : true
}).removeClass('lazy');
});
so you don't need to place your configuration to every you ajax code

As of jQuery 1.7, the .live() method is deprecated. Use .on() to attach event handlers.
Example -
$( document ).on( events, selector, data, handler );

For those who are still looking for a solution , the best way of doing it is to bind the event on the document itself and not to bind with the event "on ready"
For e.g :
$(function ajaxform_reload() {
$(document).on("submit", ".ajax_forms", function (e) {
e.preventDefault();
var url = $(this).attr('action');
$.ajax({
type: 'post',
url: url,
data: $(this).serialize(),
success: function (data) {
// DO WHAT YOU WANT WITH THE RESPONSE
}
});
});
});

If your ajax response are containing html form inputs for instance, than this would be great:
$(document).on("change", 'input[type=radio][name=fieldLoadedFromAjax]', function(event) {
if (this.value == 'Yes') {
// do something here
} else if (this.value == 'No') {
// do something else here.
} else {
console.log('The new input field from an ajax response has this value: '+ this.value);
}
});

use jQuery.live() instead . Documentation here
e.g
$("mylink").live("click", function(event) { alert("new link clicked!");});

For ASP.NET try this:
<script type="text/javascript">
Sys.Application.add_load(function() { ... });
</script>
This appears to work on page load and on update panel load
Please find the full discussion here.

Important step for Event binding on Ajax loading content...
01. First of all unbind or off the event on selector
$(".SELECTOR").off();
02. Add event listener on document level
$(document).on("EVENT", '.SELECTOR', function(event) {
console.log("Selector event occurred");
});

Here is my preferred method:
// bind button click to function after button is AJAX loaded
$('#my_button_id').bind('click', function() {
my_function(this);
});
function my_function () {
// do stuff here on click
}
I place this code right after the AJAX call is complete.

I would add one point that was NOT obvious to me as a JS newb - typically your events would be wired within document, e.g.:
$(function() {
$("#entcont_table tr td").click(function (event) {
var pk = $(this).closest("tr").children("td").first().text();
update_contracts_details(pk);
});
}
With event delegation however you'd want:
$(function() {
// other events
}
$("#entcont_table").on("click","tr td", function (event) {
var pk = $(this).closest("tr").children("td").first().text();
update_contracts_details(pk);
});
If your event delegation is done within the document ready, you'll an error of the like:
cant assign guid on th not an boject

Binding a function that is already bound to another element

I have a bunch of elements that get three different classes: neutral, markedV and markedX. When a user clicks one of these elements, the classes toggle once: neutral -> markedV -> markedX -> neutral. Every click will switch the class and execute a function.
$(document).ready(function(){
$(".neutral").click(function markV(event) {
alert("Good!");
$(this).addClass("markedV").removeClass("neutral");
$(this).unbind("click");
$(this).click(markX(event));
});
$(".markedV").click(function markX(event) {
alert("Bad!");
$(this).addClass("markedX").removeClass("markedV");
$(this).unbind("click");
$(this).click(neutral(event));
});
$(".markedX").click(function neutral(event) {
alert("Ok!");
$(this).addClass("neutral").removeClass("markedX");
$(this).unbind("click");
$(this).click(markV(event));
});
});
But obviously this doesn't work. I think I have three obstacles:
How to properly bind the changing element to the already defined function, sometimes before it's actually defined?
How to make sure to pass the event to the newly bound function [I guess it's NOT accomplished by sending 'event' to the function like in markX(event)]
The whole thing looks repetitive, the only thing that's changing is the alert action (Though each function will act differently, not necessarily alert). Is there a more elegant solution to this?

There's no need to constantly bind and unbind the event handler.
You should have one handler for all these options:
$(document).ready(function() {
var classes = ['neutral', 'markedV', 'markedX'],
methods = {
neutral: function (e) { alert('Good!') },
markedV: function (e) { alert('Bad!') },
markedX: function (e) { alert('Ok!') },
};
$( '.' + classes.join(',.') ).click(function (e) {
var $this = $(this);
$.each(classes, function (i, v) {
if ( $this.hasClass(v) ) {
methods[v].call(this, e);
$this.removeClass(v).addClass( classes[i + 1] || classes[0] );
return false;
}
});
});
});
Here's the fiddle: http://jsfiddle.net/m3CyX/

For such cases you need to attach the event to a higher parent and Delegate the event .
Remember that events are attached to the Elements and not to the classes.
Try this approach
$(document).ready(function () {
$(document).on('click', function (e) {
var $target = e.target;
if ($target.hasClass('markedV')) {
alert("Good!");
$target.addClass("markedV").removeClass("neutral");
} else if ($target.hasClass('markedV')) {
alert("Bad!");
$target.addClass("markedX").removeClass("markedV");
} else if ($target.hasClass('markedX')) {
alert("Ok!");
$target.addClass("neutral").removeClass("markedX");
}
});
});
OR as #Bergi Suggested
$(document).ready(function () {
$(document).on('click', 'markedV',function (e) {
alert("Good!");
$(this).addClass("markedV").removeClass("neutral");
});
$(document).on('click', 'markedX',function (e) {
alert("Bad!");
$(this).addClass("markedX").removeClass("markedV");
});
$(document).on('click', 'neutral',function (e) {
alert("Ok!");
$(this).addClass("neutral").removeClass("markedX");
});
});
Here document can be replaced with any static parent container..

How to properly bind the changing element to the already defined function, sometimes before it's actually defined?
You don't bind elements to functions, you bind handler functions to events on elements. You can't use a function before it is defined (yet you might use a function above the location in the code where it was declared - called "hoisting").
How to make sure to pass the event to the newly bound function [I guess it's NOT accomplished by sending 'event' to the function like in markX(event)]
That is what happens implicitly when the handler is called. You only need to pass the function - do not call it! Yet your problem is that you cannot access the named function expressions from outside.
The whole thing looks repetitive, the only thing that's changing is the alert action (Though each function will act differently, not necessarily alert). Is there a more elegant solution to this?
Yes. Use only one handler, and decide dynamically what to do in the current state. Do not steadily bind and unbind handlers. Or use event delegation.

Is it possible to use .preventDefault() in the trigger() in jQuery

I created a custom event called slides.swap but I want to prevent the event coming from a click in the trigger(). It's not working. How do I do that from the trigger()?
I know I can prevent it in the click function but I just want to keep everything "encapsulated".
JS:
tabs.on('click', 'a', function(e){
$(this).trigger('slides.swap', e);
});
//Custome event
tabs.find('a').bind('slides.swap', function(e){
var self = $(this),
selfIndex = self.parent().index(),
targetSlide = slides.eq(selfIndex);
e.preventDefault(); //somehow this doesn't work
//fade in/out slides
slides.filter('.active').stop(true, false).fadeOut(speed, function(){
$(this).removeClass('active');
});
targetSlide.stop(true, false).fadeIn(speed).addClass('active');
tabs.removeClass('selected');
self.parent().addClass('selected');
});

You're calling preventDefault() on the Event object for the swap event, which is different to the click event. Try calling preventDefault() on the event object you pass to the slides.swap handler;
tabs.find('a').bind('slides.swap', function(e, clickEvent){
if (typeof clickEvent === "object" && typeof clickEvent.preventDefault === "function") { // Check the parameter was provided and that it was an event object.
clickEvent.preventDefault();
}
// everything else
});
It must be said though that this isn't great program design. It's wrong to manipulate another event chain/ object from another.