having a slight problem here. I have a post stream on my site, each post has buttons that execute different actions that are setup in my $(document).ready() now, to add posts I make an AJAX call that returns the html for the new post element, but the actions in the my previous $(document).ready() do not apply to this new element, and adding it in a $(document).ready() for the element causes the buttons from the already posted elements to be duplicated.
Any idea how I can get around this?
The elements that added after documnet ready event don't accept binding events (you call it ations). You may use .click() or .hover() or .bind('click', function(){}) and neither works. You can use jQuery .live() or .delegate()
Using delegate is much better because when you use live for click (for example) it means you'r listening to any click happening on your document and determining if it's that click you where looking for or not? But with delegate you limit the clicks that computer process to find your click.
$('.myinput').live('click', function(){
// do something if a click happened and it was on my input
})
$('.myDiv').delegate('.myinput', 'click', function(){
// do something if a click happened in my div and it was on my input
})
if you use $(selector).live(eventType, handler) it should add events to all elements matching that selector.. even if they are added after the DOM is loaded:
http://api.jquery.com/live/
like #Mohsen said there was a way to solve this using .live()
now its depreciated and there is alternate way:
How to change depreciated method?
$( 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+
link: jQuery .live()
I had thesame problem and this last one with ".on" works fine for me.
Maybe someone have thesame problem and use it too
Related
I have a click event on the body of my document:
$("body").on('click.findElem', function(e) {
e.stopPropagation();
e.preventDefault();
self.hinter(e.target);
return false;
});
It basically catches the clicked target and does something to it. However, there are some targets that already have a click event on them, and they prevent my click from being executed at all. How do I overcome that issue? I tried unbinding it, but the click doesn't even work at all to actually execute the unbinding.
e.stopImmediatePropagation() does the job, but only if your handler executes before whatever other handler exists.
Unfortunately there is no way to insert your own handler in the first position - but you can use this nasty hack if the other handlers were bound using jQuery, too: How do you force your javascript event to run first, regardless of the order in which the events were added?
If you really need this you might want to bind an event handler in capture mode using the native DOM API: https://developer.mozilla.org/en-US/docs/Web/API/EventTarget.addEventListener
Capture handlers are triggered before bubble handlers (which are used by jQuery and most other scripts) so that way you have very high chance to execute your handler first.
try this and see demo
$( "body" ).on( "click", ".clickme:not(.clicked)", function( event ) {
$(this).addClass('clicked');
alert('here');
});
i tend to not use on and stick with the bind/unbind combo.
i have some pages that reload partial content and then has to rebind the events.
i tipically do something like this
$(".theobjectsiwant").unbind("click").bind("click", function() {
alert('hi there');
});
If you want/have to stick with the on() function, you shouldn't mix on() with unbind() and try a similar approach with .off("click").on("click")
Check here for a sample http://api.jquery.com/off/
I am trying to bind click handlers to incoming ajaxed content. I used to use 'live'
$('#div').live('click', function(event) {
alert('I got clicked, Live style');
});
But now as my site is getting more complicated, I am realizing how crazy things can get using live and having everything bubble to the top of the DOM. Which is not ideal.
So I started using on(),
$('#div').on('click', function(event) {
alert('I got clicked, On style');
});
But I miss the fact that using live() I could just initialize the click handlers once and be done with it instead of reinitialize them every time new content is loaded. Is there a best of both worlds?
Is there a better way to "reload" click handlers to recognize new ajax content aside from creating the handlers in the ajax callback function? To me that seems highly suspect. Whats the appropriate way to do this?
As of jQuery 1.7 the following .on() event binding is equivalent to the deprecated live:
$(document).on('click', '#div', function(event) {
alert('I got clicked, On style');
});
You can also bind the event to some fixed element further down the DOM which doesn't get re-generated, this functionality would be the same as .delegate():
$('#parentofdiv').on('click', '#div', function(event) {
alert('I got clicked, On style');
});
It is advisable to use the second form to narrow down the scope of the event binding as much as possible to make it easier to maintain.
Edit: For the record, what you originally did in your post would be the preferred replacement for your .bind() calls in your code.
Have you looked at using .delegate? http://api.jquery.com/delegate/
jQuery's on() method can be used to attach various events to already existing items as well as items added by ajax calls to the DOM in the future:
$(document).on("click", ".ajax-added-content", function(event) {
alert('I got clicked, On style');
});
It is possible to do what you want with
.on()
and it is actually the recommended method.
.live()
is deprecated as of jquery 1.7.
You can attach your event to the body and use this overload of "on" to get the functionality you desire. Check the next to last example in jquery's doco of .on
$("body").on("click", "#div", function(){
alert('I got clicked, On style');
});
I have an group of checkboxes with id's starting with somename and I want catch the click event of these checkboxes. Previously I have done this through jQuery. i.e.:
$("input[id^='somename']").click(function(){
// my code follows here
})
but this is not working this time around. Why?
P.S. The element is created via JavaScript after the page is fully loaded after making some ajax request. I don't know if this may be the problem?
just use live if elements are created after the page is loaded.
$("input[id^='somename']").live('click', function(){ // my code follows here })
P.S : Your search selector is "somename" but you search it on the attribute ID, are you sure that you don't want :
$("input[name^='somename']").live('click', function(){ // my code follows here })
instead?
This indeed could be the problem. Replace .click with .live()
$("input[id^='somename']").live('click', function(){ // my code follows here })
and you should be fine.
Since a call to .click is just a shortcut for .bind('click', fnc), this will not work if the element is not in the DOM when calling this. Even better than using .live() would be to use .delegate(). Have a read:
.live(), .delegate()
Using the standard binding functions only works on elements that exist at the time of the bind. You need to use something called event delegation, where elements further up the DOM tree are notified of events on descendant elements. The best way to do this is with .delegate():
$('#containingElement').delegate("input[id^='somename']", 'click', function(){
// your code here
});
This assumes that you have an element #containingElement that contains all the elements that you want to capture the events on.
NB that other answers recomment live. live and delegate use the same backend code, but for various reasons delegate is more efficient.
I believe that because you want this applied to dynamically created elements in the DOM you are going to have to use the the jQuery .live() method:
$("input[id^='somename']").live('click', function(e) {
// Your code
});
Instead of .click() try .change() event.
What is the appropriate method to get the already-initialized javascript to interact with content loaded using jQuery's load() method?
Example: You have a table with an onclick event for each row, then append() a new row to the table, suddenly the onclick() event does not fire.
Hopefully it is possible to do this without manually re-initializing every event by writing it into the code that executes the load().
I've looked at $.getScript, live(), and bind() - but haven't gotten any to work. Before I head into hours of trial-and-error, I'd appreciate some guidance.
For the event examples you want .live() or .delegate(), for example:
$("table").delegate("tr", "click", function() {
//do something, the table row is this, for example:
$(this).toggleClass("selected");
});
What this does is attach an event handler to the <table> element, which listens for events to bubble up (which elements do regardless of when they were added) and acts upon those events if the element the event came from matches the selector, in this case a <tr>.
Or it's an element with an unknown parent, use .live() like this:
$(".something").live("click", function() {
$(this).toggleClass("selected");
});
.live() works very similarly (in face .delegate() uses .live() internally), it just attaches to document, so a parent higher in the DOM.
i have a code that bind's on click action on page load, it is a link. When i clicking it, it send ajax request and replace content in some div with jquery append() function. This new content has a links and i need to bind some action for them, but i could't.. bind did't work i think, because jquery append doesn't update DOM tree. How could i get a late binding?
There are 3 functions that can do this:
$(selector).live(events, data, handler); - jQuery 1.3+ - version deprecated: 1.7, removed: 1.9 (reference)
$(document).delegate(selector, events, data, handler); - jQuery 1.4.3+ - As of jQuery 1.7, .delegate() has been superseded by the .on() method. (reference)
$(document).on(events, selector, data, handler); - jQuery 1.7+ - preferred (reference)
It's generally adviced to use on() and it's use is simple and probably preferred way.
The first selector must exist when calling the function and may not be deleted or the event will be gone too (this can be document).
The first parameter is the event (e.g. "click")
The second parameter is the selector of which you want to bind the event on.
Then finally you can add some custom data and a function to the event.
Here's some sample code:
// Make sure the DOM is ready
$(function() {
// Bind the click event to the function
$(document).on("click", "a.class", function(event) {
// Put your code here.
});
});
Late binding is now available by utilizing jQuery's live() event:
$('a.my-links-class').live('click', function() {
// do your link action here
});
Method .live in JQuery 1.9 is deprecated.So now u can do like this:
$("body").on("click", ".classname", function() { ... })
the .live() event was deprecated from verions 1.9 up.
For anyone using later version of Jquery they can use the .on() event, it works pretty much in the same way.
You need to use jQuery's live function, which will bind an event to all elements that match a selector, no matter when they were created.
You can use jQuery 1.3+'s $().live(event, function) function. $("a").live("click", myClickFunc) will bind myClickFunc just like $("a").click(myClickFunc) or $("a").bind("click", myClickFunc), but the events will be bound "live", so elements that are added to the DOM after that function call will also be bound.
You can remove live-bound events with $().die().
For more information on $().live, see the documentation for it.
Another option would be to have a function to bind the elements given a certain context (using the $ selector function's rarely-used second parameter):
function myBindEvents(context) {
$("a", context).click(myClickFunc);
}
and call that whenever you update an element with AJAX:
$("<div>").load("...", "...", function(){myBindEvents(this);});
Hope this helps. :)
In my case I am using js library in that I have element variable and code was like
$(element).click(function(){
//some action
});
but that is not working with my late binding element.
So I finally use core js click event
element.addEventListener('click', function() {
//My some action
}, false);