I have the following code:
$(document).ready(function({
$(".click").click(function(){
alert(' The Button Was Clicked !');
});
}));
This works fine.But If I add an element with the same class to the web page, as shown here:
$('#clicked').click(function(){
$("#area").append("<button class='click'>Click me</button>");
});
Then the event handler I added before to the .click class won't work for this new element.
What's that best way to add event handlers to elements that were added dynamically ?
UPDATE
It's been a while since I posted this answer and things have changed by now:
$(document).on('click', '.click', function() {
});
Since jQuery 1.7+ the new .on() should be used and .live() is deprecated. The general rule of thumb is:
Don't use .live() unless your jQuery version doesn't support .delegate().
Don't use .delegate() unless your jQuery version doesn't support .on().
Also check out this benchmark to see the difference in performance and you will see why you should not use .live().
Below is my original answer:
use either delegate or live
$('.click').live('click', function(){
});
or
$('body').delegate('.click', 'click', function() {
});
In reference to your code, the way to do it would be.
$('.click').live('click', function(){
... do cool stuff here
});
Using the .live() function allows you to dynamically attach event handlers to DOM objects.
Have fun!
for all the elements added dynamically to DOM at run time , please use live
http://api.jquery.com/live/
After jQuery 1.7 the live method just points to .on() method. And I had alot trouble finding out how to bind event handler to element which is appended to the DOM after its loaded.
$('body').live('click', '.click', function(){
//Your code
});
This worked for me. Just a little tip for those having trouble with it also.
Related
I have to generate some buttons dynamically based on some service response, and also have to attach some handlers on click of those buttons. So I am using jQuery.live() for it, it works well for the first time.
But when i removes all buttons using jQuery("<some container div>").empty() and creates again those buttons, now on click of button "handler calls twice", if I repeat the same it fires thrice and and same.
Can you guys help me, thanx in advance.
$().live() was depreciated in jQuery 1.7 and removed in 1.9
Or try something like
$('#button').die('click').live('click', function(e) {
alert('Button click');
});
Follow jquery website jquery.live() :
Attach an event handler for all elements which match the current
selector, now and in the future.
That's mean : the event that you attach with live will be applied for all element that have same selector. So you must check the event of element and just attach new element if it's not available.
$("SELECTOR").live('click',function(e){
//check the event is already set
e.preventDefault();
if(e.handled === true) return false;
e.handled = true;
//Do something here
//YOUR CODE HERE
return false;
});
Try this, on your removeButton function, try unbinding the click event. And rebind it when you add it again.
function removeButton(){
$("button").unbind("click");
//code for removing button
}
function addButton(){
//code for adding button
$("button").live("click", function(){
//your code
});
}
This is not a direct answer to the question. However it is worth to take a note of it.
.live() vs .bind()
#jAndy says:
You should consider to use .delegate() instead of .live() whereever possible. Since event delegation for .live() always targets the body/document and you're able to limit "bubbling" with .delegate().
And from jQuery:
As of jQuery 1.7, .delegate() has been superseded by the .on() method.
For earlier versions, however, .delegate() remains the most effective means to use event delegation.
Reference:
The Difference Between jQuery's .bind(), .live(), and .delegate()
Jquery live() vs delegate()
Differences Between jQuery .bind() vs .live() vs .delegate() vs .on() Introduction
I am using Jquery 1.11.min and this worked for me:
$(document).ready(function() {
$('#button_id').off('click').on('click', function() {
//enter code here
});
});
This question already has answers here:
Event binding on dynamically created elements?
(23 answers)
Closed 5 years ago.
I've been having a lot of trouble attaching the click event to a JQuery object before adding it to the DOM.
Basically I have this button that my function returns, then I append it to the DOM. What I want is to return the button with its own click handler. I don't want to select it from the DOM to attach the handler.
My code is this:
createMyButton = function(data) {
var button = $('<div id="my-button"></div>')
.css({
'display' : 'inline',
'padding' : '0px 2px 2px 0px',
'cursor' : 'pointer'
}).append($('<a>').attr({
//'href' : Share.serializeJson(data),
'target' : '_blank',
'rel' : 'nofollow'
}).append($('<image src="css/images/Facebook-icon.png">').css({
"padding-top" : "0px",
"margin-top" : "0px",
"margin-bottom" : "0px"
})));
button.click(function () {
console.log("asdfasdf");
});
return button;
}
The button that is return is unable to catch the click event. However, if I do this (after the button is added to the DOM):
$('#my-button').click(function () {
console.log("yeahhhh!!! but this doesn't work for me :(");
});
It works... but not for me, not what I want.
It seems to be related to the fact that the object is not yet a part of the DOM.
Oh! By the way, I'm working with OpenLayers, and the DOM object that I'm appending the button to is an OpenLayers.FramedCloud (Which is not yet a part of the DOM but will be once a couple of events are triggered.)
Use this. You can replace body with any parent element that exists on dom ready
$('body').on('click', '#my-button', function () {
console.log("yeahhhh!!! but this doesn't work for me :(");
});
Look here http://api.jquery.com/on/ for more info on how to use on() as it replaces live() as of 1.7+.
Below lists which version you should be using
$(selector).live(events, data, handler); // jQuery 1.3+
$(document).delegate(selector, events, data, handler); // jQuery 1.4.3+
$(document).on(events, selector, data, handler); // jQuery 1.7+
I am really surprised that no one has posted this yet
$(document).on('click','#my-butt', function(){
console.log('document is always there');
})
If you are unsure about what elements are going to be on that page at that time just attach it to document.
Note: this is sub-optimal from performance perspective - to get maximum speed one should try to attach to the nearest parent of element that is going to be inserted.
Try this.... Replace body with parent selector
$('body').on('click', '#my-button', function () {
console.log("yeahhhh!!! but this doesn't work for me :(");
});
Try:
$('body').on({
hover: function() {
console.log("yeahhhh!!! but this doesn't work for me :(");
},
click: function() {
console.log("yeahhhh!!! but this doesn't work for me :(");
}
},'#my-button');
jsfiddle example.
When using .on() and binding to a dynamic element, you need to refer to an element that already exists on the page (like body in the example). If you can use a more specific element that would improve performance.
Event handlers are bound only to the currently selected elements; they
must exist on the page at the time your code makes the call to .on().
To ensure the elements are present and can be selected, perform event
binding inside a document ready handler for elements that are in the
HTML markup on the page. If new HTML is being injected into the page,
select the elements and attach event handlers after the new HTML is
placed into the page. Or, use delegated events to attach an event
handler, as described next.
Src: http://api.jquery.com/on/
You have to append it. Create the element with:
var $div = $("<div>my div</div>");
$div.click(function(){alert("clicked")})
return $div;
Then if you append it will work.
Take a look at your example here and a simple version here.
Complement of information for those people who use .on() to listen to events bound on inputs inside lately loaded table cells; I managed to bind event handlers to such table cells by using delegate(), but .on() wouldn't work.
I bound the table id to .delegate() and used a selector that describes the inputs.
e.g.
HTML
<table id="#mytable">
<!-- These three lines below were loaded post-DOM creation time, using a live callback for example -->
<tr><td><input name="qty_001" /></td></tr>
<tr><td><input name="qty_002" /></td></tr>
<tr><td><input name="qty_003" /></td></tr>
</table>
jQuery
$('#mytable').delegate('click', 'name^=["qty_"]', function() {
console.log("you clicked cell #" . $(this).attr("name"));
});
Does using .live work for you?
$("#my-button").live("click", function(){ alert("yay!"); });
http://api.jquery.com/live/
EDIT
As of jQuery 1.7, the .live() method is deprecated. Use .on() to attach event handlers. Users of older versions of jQuery should use .delegate() in preference to .live().
http://api.jquery.com/on/
On event
$('#my-button').on('click', function () {
console.log("yeahhhh!!! but this doesn't work for me :(");
});
Or add the event after append
jQuery .on method is used to bind events even without the presence of element on page load.
Here is the link
It is used in this way:
$("#dataTable tbody tr").on("click", function(event){
alert($(this).text());
});
Before jquery 1.7, .live() method was used, but it is deprecated now.
Maybe bind() would help:
button.bind('click', function() {
alert('User clicked');
});
Say I have this code in my page:
<script language="javascript">
$(document).ready(function() {
$(".test").click(function() {
alert('Hello');
});
});
</script>
Why doesn't the previous code apply to elements with the class "test" which I add later to the document like this for example:
$('body').append('<p class="test">Test</p>');
Because what happens is that when I click the previous <p> tag nothing happens.
Also, if I have this:
<div id="first">Edit me.<div id="second">Save me.</div></div>
Can I do what the text describes? that is, controlling the content of the #first div without affecting the content of the #second div?
Thank you.
The problem is that .click() does only apply a listener for elements that are available in the DOM when the method is executed. You should take a look at .on() instead.
With .on() you can delegate the event, like this for instance:
$("body").on("click", ".test", function() {
alert('Hello');
});
Now any element (current and future) with the class test available within your body will have a click-event listener.
live is deprecated as of 1.7, use on
http://api.jquery.com/on/
try using on() listener:
$(document).on("click",".test", function() {
alert('Hello');
});
When you bind events to elements they only bind to those elements that have already been created. So you need to run the 'bind' command again on the new elements.
Alternatively, you can use on('click') which will bind the event to existing and all future elements.
Because at the time you attach your event handler the object doesnt exist yet. You cant subscribe to elements that dont exist. You can use the Live method for this.
http://api.jquery.com/live/
It seems those are deprecated (thanks #Anthony Grist). Use On, or delegate() instead.
http://api.jquery.com/on/
http://api.jquery.com/delegate/
$('div').on('click', function()
{
//Do something
});
you should use "on" to bind events with the elements that are added after the script is interpreted.
$(document).on("click", selector, function(e){
//do something
});
If you need to apply the click to later added tags, you should use live on
$(document).on('click','.test',function() { });
EDIT: #Anthony your're right. live is deprecated. Updated the code
I have a simple script that closes a DIV. An example is here: http://jsfiddle.net/22fTm/3/
My problem however, is that the DIV "box" is only produced after an ajax call, which is part of a search php script.
Any idea what I need to make this work? Similar question: How to hide an element on an AJAX call?
Since the element is created dynamically you have to use on or delegate which take care of triggering the event even when the elements are added dynamically.
Using on
$(function(){
$(document).on("click", "div.box a.close", function() {
$(this).parent("div.box").fadeOut();
});
});
on() reference: http://api.jquery.com/on/ JQuery ver 1.7+
Demo
Using delegate
$(function(){
$(document).delegate("div.box a.close", "click", function() {
$(this).parent("div.box").fadeOut();
});
});
delegate() reference: http://api.jquery.com/delegate/
Demo
.live will help :)
http://api.jquery.com/live/
But you could also display the div by default and set it to display:none and then toggle the div a soon as some one does a search...
When you dynamically insert elements with AJAX any handlers registered with the original .bind() or .click() methods won't work, because they only work on elements that are already in the DOM at the time.
You need to either:
re-register the handler after the content has been added to the DOM, or
use .on() (if you're using jQuery 1.7+) to register a "live" handler which will work even on elements that are created after the handler was registered.
e.g.:
$(document).on('click', '.search-sbox .close', function() {
....
});
if using jQuery prior to 1.7, use .live() instead.
try changing it into
$(function(){
$("div.box a.close").live("click", function() {
$(this).parent("div.box").fadeOut();
});
});
live() is for supporting event-handlers, also after the dom is loaded.
That usually depends on When do you want it to hide?
for example you may use
$('.select').live('click',function (){
$('div').hide();
});
you may also use delegate,
also, you can use it on ajax success, if necessary
Below Javascript should work, it uses jquery's delegate function, as live is deprecated in jquery
$("#searchresultdata").delegate("a.close", "click", function() {
$(this).closest("div.box").fadeOut();
});
You need to delagate events. In your case use this code for your site:
$('#searchresultdata').delegate('div.search-sbox a.close', 'click', function() {
$(this).parent("div.search-sbox").fadeOut();
});
I have a simple jQuery('div#star').click(function.
The function works once when the DOM is initially loaded, but at a later time, I add a div#star to the DOM, and at that point the click function is not working.
I am using jQuery 1.4.4, and as far as I know, I shouldn't need to use .live or .bind anymore. There is never more than one div#star in the DOM at any one time. I tried changing from id="star" to class="star" but that didn't help.
Any suggestions on how to get this working or why it isn't working?
I've had the .click inside the jQuery(document).ready, and in an external js file, and neither works after adding the div to the DOM.
This works with jQuery 2.0.3
$(document).on('click', '#myDiv', function() {
myFunc();
});
As of jQuery 1.7, the .live() method is deprecated. The current recommendation is to use .on() which provides all functionality covering the previous methods of attaching event handlers. Simply put, you don't have to decide any more since on() does it all.
Documentation is handily provided in the help for converting from the older jQuery event methods .bind(), .delegate(), and .live()
You still need to use live events.
http://api.jquery.com/live/
try
.on('event', 'element', function(){
//code })
You need to use either live or delegate here. Nothing has changed in this department since jQuery 1.4.4.
Try to think of it like this: click and bind attach an event to the element itself, so when the element disappears, all the information about the event does too. live attaches the event at the document level and it includes information about which element and event type to listen for. delegate does the same thing, except it attaches the event information to whatever parent element you like.
user "live" method $("div#star").live("click", function() {});
Doc
You can use delegate instead on :
$(document).delegate('click', "selector", function() {
//your code
});
I hope it will help.