How to Detect When a New Element Has Been Added to the Document in Jquery

How can I detect when a new element has been added to the document in jquery?

If you want to do some jQuery on it, you can also do something like livequery (extra plugin):

$('column-header').livequery(function()
{
    // do things here with your column-header, like binding new events and stuff.
    // this function is called when an object is added.
    // check the API for the deletion function and so on.
});

UPDATE:
It seems that the link was broken. Try this link

How to detect new element creation in jQuery?

You can use the .livequery() plugin for this, it runs for each element, including new ones, like this:

$("a").livequery(getLinkCount);

However, this plugin is out-of-date and is not recommended for current versions of jQuery.

It's usually easier to do this when you create the elements though, for example if you're doing it after AJAX requests, the .ajaxComplete() handler may be a good place, for example:

$(document).ajaxComplete(getLinkCount);

This would run after each request, and since you normally create elements in your success handler, they would already be present when this complete handler runs.

Detect newly inserted element in the document

Here is a thought:

var cnt=0;

var f = Element.prototype.appendChild;
Element.prototype.appendChild = function(){
   f.apply(this, arguments);
   console.log("added",++cnt) 
};

However you will need to see if it is the same element that is added and I have not figured out how to check the remove since that is parentNode.removeChild

If you want events on all selects in jQuery all you have to do is delegate

$(document).on("change","select",function() { 
  // all current and future selects will have this event
});

jquery detecting div of certain class has been added to DOM

3 years of experience later, this is how I listen to "element of a certain class added to the DOM": you simply add a hook into the jQuery html() function, like this:

function Start() {

   var OldHtml = window.jQuery.fn.html;

   window.jQuery.fn.html = function () {

     var EnhancedHtml = OldHtml.apply(this, arguments);

     if (arguments.length && EnhancedHtml.find('.MyClass').length) {

         var TheElementAdded = EnhancedHtml.find('.MyClass'); //there it is
     }

     return EnhancedHtml;
   }
}

$(Start);

This works if you're using jQuery, which I do. And it doesn't rely on the browser-specific event DOMNodeInserted, which is not cross-browser compatible. I also added the same implementation for .prepend()

Overall, this works like a charm for me, and hopefully for you too.

How can I be notified when an element is added to the page?

Warning!

This answer is now outdated. DOM Level 4 introduced MutationObserver, providing an effective replacement for the deprecated mutation events. See this answer to another question for a better solution than the one presented here. Seriously. Don't poll the DOM every 100 milliseconds; it will waste CPU power and your users will hate you.

Since mutation events were deprecated in 2012, and you have no control over the inserted elements because they are added by someone else's code, your only option is to continuously check for them.

function checkDOMChange()
{
    // check for any new element being inserted here,
    // or a particular node being modified

    // call the function again after 100 milliseconds
    setTimeout( checkDOMChange, 100 );
}

Once this function is called, it will run every 100 milliseconds, which is 1/10 (one tenth) of a second. Unless you need real-time element observation, it should be enough.

Jquery: how to detect when some element is added to dom?

This is solution to my problem:

$(document).bind('DOMNodeInserted DOMNodeRemoved', function(element){
    if($(this).hasClass('pac-container')){
        console.log(element.target);
    }

});

How to detect element being added/removed from dom element?

Use Mutation Observers as suggested by @Qantas in his answer

---

Following methods are deprecated

You can use DOMNodeInserted and DOMNodeRemoved

$("#parent").on('DOMNodeInserted', function(e) {
    console.log(e.target, ' was inserted');
});

$("#parent").on('DOMNodeRemoved', function(e) {
    console.log(e.target, ' was removed');
});

MDN Docs

Using Jquery to check if items have been added to a list by user

Use DOMSubtreeModified event and check if new element added to DOM.

$("#a").bind("DOMSubtreeModified", function() {
    alert("list updated");
});

Demo:
Fiddle

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