Event Handling :: EventHandlers For Each Of The 3 Div's Should Be Fired?
Apr 14, 2011
I have a question about event handling in javascript.Let's say I have 3 divs, directly in the body of an html document.
<html>
<body>
<div id="div1black"></div>[code].......
Each of those div's is positioned differently using css, as displayed in the image below: Each div has an event listener for the click event.In the image above I marked a point. If the user would click on that point, are all 3 event listeners supposed to fire? As I understood it, there's a capture and a bubbling phase, but these only go down through and up from the ancestors of the target right? And none of the div's are ancestors of eachother, they just happened to overlap because of the css position.
How would I let all registered eventsHandlers be fired whenever a user clicks on overlapping HTML elements? (so the eventHandlers for each of the 3 div's should be fired).
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Oct 20, 2009
Is it possible to capture the control.event or element.event that was fired to invoke the onbeforeunload event.
For example, if a button is clicked and it causes the onbeforeunload event to fire can i determine which button was clicked.
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Jun 19, 2009
I have several onChange events tied to some html tags. I will like to know which ID fires an event.
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Nov 12, 2010
build that js for a drupal module. The function "Drupal.open_upload_modal" is called on every click (alerts), but why is the click event only working once after page load?
<a href="#upload" onclick="Drupal.open_upload_modal();" title="upload">SAVE</a>
// $Id: automodal_upload.js,v 1.1.2.7 2009/12/28 02:21:20 Exp $
(function ($) {
Drupal.open_upload_modal = function(){
[Code].....
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Feb 10, 2009
I have a text field. when i set data into the text field from other javascript function then the onChange event does not fired of the text field. is there any other way to check the text changed of the text field? My text field is readonly. and date are set here from datepicker.
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Nov 15, 2010
I'm writing an XML generating app here, and i have come across an interesting problem. When i click on any part of the body of the document, the function addRow() is being triggered. This is odd, because the only event handler that should ever fire this is a Button that much be clicked, and it is also triggered once when the document is Loaded.
The biggest question is, ...why when i click anywhere on the document, is this even being triggered.
Here's my code (sorry it's a bit long..but copy and paste and you should be able to replicate what i'm getting)
Some notes:
1. removing the script tabber.js does not change this error. It still happens
2. removing the onLoad= in the body, and manually adding in the first table cell, and row of the table seems to fix this, however, i need to eventually load a list of table cells from a CSV file. So that workaround won't be sufficient
<html>
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May 28, 2011
I am using the following code to load a part of page dynamically using jquery [code]...
The loading part and even changing the browser URL is working. but why is the Pop-state function being fired multiple times?
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May 24, 2009
I have a textarea and a DIV as code below. The way it supposes to work is when I focus on the textarea by clicking it, the DIV will show. Otherwise, it will be hidden. Then when I click the DIV, there will be an alert(). However, right now if I click on the DIV, it will trigger the blur() event first which calls to hide() the DIV. After that, the click event is not called at all. I need to be able to click on the DIV and the DIV is not hide() at all and show alert().
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://
www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
[Code]....
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Apr 27, 2009
In jQuery, how to select a parent element to a child if I attached a click event on the parent but also want a click event on a child within.
Let's say I have a the following code :
HTML Code:
There may be several of those classes in the page. I then use jQuery to replace the inner HTML to the clickclass div when clicked on with some other code and a input button (with an ID of, let's say 'save_button').
This works fine for that part:
HTML Code:
I then want to have the button clickable so that I can replace again the HTML in the div (like a save button). But if I try a separate event listener on the input button, it also fires the parent event. Even if I return false on the child event or use event.stopImmediatePropagation() in the .click child function.
I've managed to almost get it with the following code :
HTML Code:
If the event is triggerd form 'clickclass', then replace with HTML + input button
The problem is that whenever I try using .parent() with jQuery, it always tells me that parent() is not a function. I've tried various other ways of getting the parent object (the clickclass div) but can't get it to work.
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Aug 13, 2009
I have a page with a form, that represent questions and the corresponding answers.I defined the minimum questions, answers, and their maximum.So I added a link in the form to add question (along with the minimum amount of answers), and a link per question to add an answer in it.the "click" event for my links is like:
$(document).ready(function(){
$(".addquestion").click(function(event){...});
$(".addanswer").click(function(event){alert("addanswer");...});
});
the code look more like JS, but basically it.adds the html code in the corresponding divs.The problem is the following: if I add a question, it also add a link to add answers to this question, but this link does not fire the event.Did I miss something to add to make it work?I mean the link in html page is exactly the same, I even tried not
changing the part with the int, it still doesn't work.
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Aug 3, 2010
I'm trying to load dynamically some content and I'd like to fire a function when all the newly added content (including images, iframes and scripts in it) are loaded:
var htmlStr='html string including images, iframes and scripts';
$("#contents").html(htmlStr).load(function(){
alert("all images, scripts and iframes are fully loaded, you can continue");
})
According tohttp:[url]....(at least how I understand it) this should work: Theloadevent is sent to an element when it and all sub-elements have been completely loaded. This event can be sent to any element associated with a URL,images, scripts, frames, iframes, and the windowobject.Unfortunatelly my function is never called. For the meantime I found a workaround:
var html=$('html string including images, iframes and scripts');
var elements=html.find("img,script,iframe,frame");
var loadCounter = elemets.length;[code]....
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Feb 11, 2010
I have a TD element, with a SPAN element inside. I use td-s onmouseover and onmouseout events for a small animation. My problem is, that, when I move the cursor over the SPAN element, the onmouseout event for TD element is fired. I want to prevent this. With other words, I want onmouseout fired, just when the cursor is moved outside the td area. See the code..
[Code]...
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Jan 20, 2008
I have two div elements (both dynamically created, one within the other). The parent div has an event attached to it:
contextmenuDIV.onmouseout = function () {doSomething()}
for example. However the onmouseout event will fire when you mouseover the child div as (of course) I am technically leaving the div layer (despite it being the parent).
Is there anyway to cancel this? I've read all about bubbling and all that, but it's just confusing me even more!
Anyway, at all, to allow me to have divs within another div element but only allow the event to fire for the parent!
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Jan 11, 2009
why I should use the dom level 2 event handling over inline events like ...
Code HTML4Strict:
<a href="http://www.yahoo.com" onClick="myFunction()">click me</a>
I work in a team of developers and our pages are dynamically created using Java.I can at any moment change the inline JS across a site due to this so changes are easier then if the site was just static HTML.As far as reasons to use dom 2 over inline, I looking for something beyond:
it separates behavior from html
it is a best practice
it is the 'modern' way of doing it
I need facts that explain why it is a best practice or why 'modern' is better like : you can only assign one function action to the event.That was just an example which I see but is not true to me.I can either assign multiple functions to it like:
Code HTML4Strict:
<a href="http://www.yahoo.com" onClick="myFunctionA();myFunctionB();myFunctionC()">click me</a>
or I can call my functions from a single function call like
Code HTML4Strict: <a href="http://www.yahoo.com" onClick="myMultiFunctionCall()">click me</a>
and then have a function defined before the inline call like
Code JavaScript:
function myMultiFunctionCall()
{[code].....
Here the second statement overwrites the first.By the way, here is a con for using dom and to me a big one considering debugging: you can't see what event handlers are assigned to what unlike inline where it is obvious because it is in the page. see http:[url].......
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Nov 17, 2011
I am having a list (ul) in which a mouse over will populate its sub categories as list under that(like tree) and so on. My problem is, when passes mouse over a 2nd or 3rd level element, 2 mouse over events will be fired (The actual one and its parent) The sample code is given below
HTML Code:
<ul>
<li>
Root[code]............
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Feb 28, 2007
I have a document with a parent element that has mousedown,mouseup and mousemove events registered to it. The parent element has some child elements as well. I observe inconsistent behaviours between browser types when I hold the mouse button down, move the pointer and release the button.
ie7 - mouseup fires when over a child or parent
op9 - mouseup fires only when over the parent
ff2 - mouseup fires only over a child or parent but only if the pointer has moved since the mousedown occured
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Jan 24, 2009
Because much of the talented JS community doesn't frequent the 'looking to hire' marketplace boards, I wanted to link to my post looking for help in understanding fully a group of functions I would like to use. While much of this I understand, along with some of the OOP principles used, there are some hang-ups I'm running into. Therefore, I'm looking for someone to walk me through the functions and help me understand the logic behind it. And since time is money, especially for those who are more skilled, I would rather respect this and pay for the conversation.
Further, if the person who takes up the task doesn't object, I will document the functions use for the community to benefit, since these are public boards. Of course, giving full credit to the original writers and the person who helped me understand.
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Oct 18, 2006
I have a question regarding how to prevent memory leaks in Internet
Explorer when using closures. I already knew about the circular
reference problem, and until now was able to prevent memory leak
problems. But I needed to store DOM elements and can't solve it
anymore. So I search the group archive to see if I missed any
valuable information. I found some interesting articles, but somehow
could not apply it to my problem or I did not understand it fully.
In particular the articles that talked about setting variables to
NULL seemed as an easy solution, but I think I didn't understand it,
because it didn't seem to work.
So, let me explain my problem in more detail. I am working on some
very dynamic and complex page. It uses AJAX (XMLHttpRequest) to alter
different parts of the page. This already disqualifies the finalize
method solution to cleanup memory leak problems. I use several
"component classes" to do the work of creating DOM elements in some
container element and provide an easy to use interface for
manipulation the content. For example I can call
component.setBackgroundColor("red")
and the component takes care of changing the style on the correct
DOM element that is encapsulated in the component. In reality the
component uses more complex interface method, but I hope you
get the picture of why I do this.
Let me show you some example code:
function MyComponent()
{
var div;
var handler = null;
this.generate = function generate()
{
div = document.createElement("div");
div.onclick = MyComponent.createClickHandler(this);
// normally more elements are created here
return div;
}
this.setBackgroundColor = function setBackgroundColor(value)
{
div.style.backgroundColor = value;
}
this.getHandler = function getHandler()
{
return handler;
}
this.setHandler = function setHandler(value)
{
handler = value;
}
}
MyComponent.createClickHandler = function createClickHandler(component)
{
return function(event)
{
var handler = component.getHandler();
if (handler != null)
handler(event);
}
}
This "component class" can be used like this:
var container = document.getElementById("container");
var component = new MyComponent();
container.appendChild(component.generate());
....
component.setBackgroundColor("red");
component.setHandler(function(event) {alert("Stop touching me!")});
The problem, of course, is that this code will create a memory leak
in Internet Explorer. I need the component in the event handler to
get the handler dynamically, but the div is stored there too,
creating a circular reference.
One of the things I tried doing is making a DOMStorage "class" like
this:
function DOMStorage()
{
var map = new Object();
this.get = function get(id)
{
return map[id];
}
this.put = function put(id, obj)
{
map[id] = obj;
}
}
var storage = new DOMStorage(); //global
Instead of storing the div element directly in the component, I store
it under an id in the DOMStorage and use it to retrieve it later.
This actually prevented the memory leak. I don't really understand
why, because I still see a circular reference. Maybe Internet
Explorer does not count references in the global scope as a circular
reference? When I move the global storage to inside the container
object I get the memory leak again.
Unfortunately I am unable to use a global DOMStorage, because the
"component class" in instantiated many times, and they must all have
their seperate DOM elements.
Perhaps I have to generate unique ID's when I put a DOM element into
the global storage? It seems so over-the-top for something that works
perfectly fine in Firefox.
What are my alternatives?
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Jul 20, 2005
I create two iframes dynamically to get data from the server.
I want to deal with the data after it's downloaded, so I set the two
iframes' onload event handlers to current document(not the iframe self), the
handlers' JS code is generated dynamically too.
But I found only the second event is triggered and I can't get the first
iframe's onload event.
Why? The data in the first iframe is really arrived, but it doesn't trigger
the onload event.
Is there any other better way to conceal download data from server, not
refresh current document?
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Jan 8, 2010
i'm trying to do some event delegation, and i can't seem to get the onchange event working in IE. i've tried:
$(document).change(function () { alert('fuck. me. IE sux'); }); $(document.body).change(function () { alert('fuck. me. again'); });
and later i have:
<select id="aSelect"> <option value="0">a first option</option> <option value="1">a second option</option> <option value="2">a third option</option> <option value="3">a fourth option</option> </select>
but this doesn't work in IE. i've also tried to wire these up manually: document.body.onchange = function (e) { alert('foo); }; and document.onchange, but those don't work either. what's the story here (other than the fact that IE is sucking balls)?
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Aug 21, 2009
Suppose I have this syntax:
I want tellme() to handle the value of href of the clicked link.
What syntax do I put in tellme()?
I got this far:
Here is question: How would I get this info from the API documentation?
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Aug 4, 2009
I'm working on a small plugin that extends a checkbox to behave as if it has 3 states. Basically it just adds an anchor above the underlying checkbox, intercepts mouse clicks, and cycles the checkbox between:
disabled + unchecked
enabled + unchecked
enabled + checked
It works fine in FF. But in IE7, for some reason, the click events are always sent to the underlying checkbox instead of the overlaid anchor. The anchor is sized to completely overlay the checkbox (and in fact, I made it's slightly bigger so clicking at the very edges
works). Incidentally, I'm using jQuery 1.2.6 since this is part of a much larger web application and we haven't yet worked out the incompatibilities we're seeing with the latest jQuery version.
Here's the plugin code (the alerts are for debugging in IE)
(function($) {
$.fn.checkbox3s = function(options) {
var opts = $.extend({}, $.fn.defaults, options);
return this.each(function() {
var proxy, cbx = $(this), parent = cbx.parent();
parent.css({position:"relative"});
proxy = $("<a href='#'></a>").css({
position:"absolute", .....
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Nov 13, 2007
I understand that when loading a page, the html parser is suspended until any script that it comes across is executed. i also believe that certain browsers will allow user input for those parts rendered whilst the rest of the page is still being parsed. suppose that a user clicks a button that is visible and 'active' and fires off some lengthy javascript execution causing the ui to 'freeze' for a while. my question is, on a page that is still being parsed but allows user input on those parts parsed and rendered, will the parsing of the rest of the page cease whilst the event handler (onclick) is working or will the user see the page render simultaneously as the event handler does its job?
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Nov 17, 2011
I have a nested lists. I'm using hover event to trigger an event. But when I hover child nodes, the event of theancestor list is being fired. How can I get rid of this situation
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Apr 14, 2011
I need to call a function when user copy and paste the text value in the text box. I tried using "mousedown" event. But "mousedown" event handles left and right clicks when user clicks on the paste link on right click unable to handle the event. I am using jquery 1.5.
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Jun 9, 2009
I am currently following the image popup example from:[URL]If I run the demo on Windows XP on Chrome or Safari, the escape keydoesn't close the popup window. How do I handle this in jQuery for
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