Develop Reference

Adding an onClick to image with Jquery fails

I have a link on am image that I include dynamically with this jQuery:
//Add back button code onclick
$("#backLocation").replaceWith(" ");
I then set the onCLikc event for the link with:
$("#backClick").on('click', function (e) {
//go back a page
parent.history.back();
});
But it does not go to the previous page.
I am not sure if its because its a locally hosted web app or what, or If I have just structured something wrong. In the adress bar the page just changes from:
page.html to page.html# when I click the back image link I cerated.

Proper .on structure is $(document).on(action, selector, function() {});
Also, you are click an href, which will tell the browser to navigate to a page, then move back a page, resulting in no action being taken. Try adding preventDefault.
I would also suggest accessing the window to go backward in history.
$(document).on('click', "#backClick", function (e) {
e = e || window.event;
e.preventDefault();
window.history.back();
});
Adding window.event will allow for support on IE 8 and older browsers.

You need to update your click binding to following
$(document).on('click', "#backClick", function (e) {
//go back a page
parent.history.back();
});

How to stop shift + mouseClick opening up a new window in Firefox

I using the Javascript library D3 and I have the ability to select multiple nodes by using shift + left mouse click. When I do this in Firefox (as my nodes have images appended) it opens the image in a new window/tab. I don't really want this happening.
How do I stop this event from firing ?

with jquery:
jQuery(document).keydown(function(e){
if(e.which === 16) {
e.preventDefault();
return;
}
});
update:
How about instead of disabling shift, you try to disable the click. you might stop it if you attach a click event and use an event.preventDefault() on it

This is how in d3 you completely disable clicks
d3.select("#prevent_link").on("click", function() {
var e = d3.event;
if(e.shiftKey) {
// CANCEL THE EVENT, WHICH WILL PREVENT ANY LINKING FROM OCCURING
e.preventDefault()
}
});
If you still want the link to work — but open in current window instead of new window — you can do this:
d3.select("#prevent_window").on("click", function() {
var e = d3.event;
if(e.shiftKey) {
e.preventDefault()
// Get the href of the <a> tag that was clicked
var href = d3.select(this).attr("href");
window.location = href;
}
});
Here's a jsFiddle. The last example doesn't work because jsFiddle doesn't let you save scripts that contain window.location, so I didn't include the last line (window.location = href;) in the fiddle.

Detect browser/tab closing

I know how to display an alert to the user if they attempt to navigate away from the current page asking them if they are sure they wish to do so but I was wondering if there is a way to display this alert ONLY when the window / tab is being closed?
I'd like to only have the confirmation display when the window or tab is being closed, not when the user clicks a link.

Not possible.
the only thing close is the onbeforeunload event, but there isn't a difference (to javascript) between a closed window/tab or a navigation to another page.
Follow-up:
I suppose you could attach a click handler to every anchor on the page and use a "dirty" flag, but that's really hack-ish. something like (forgive me, but using jquery for simplicity):
(function(){
var closingWindow = true;
$('a').on('click', function(){
if (this.href == /* on-domain link */){
closingWindow = false;
}
});
$(window).on('beforeunload',function(){
if (closingWindow){
// your alert
}
});
})();
but that's about as close as you're going to get. note: this isn't going to help if another javascript function uses window.location, etc.

You cannot differentiate between the two.
window.onbeforeunload is triggered immediately before the browser unloads its resources. You do not know the reason for the unload, only that it's about to occur:
From the MDN:
An event that fires when a window is about to unload its resources.
The document is still visible and the event is still cancelable.

How about doing something like this?
Have a global variable set to false (i.e. var hasCLickedLink = false;)
On all your links (<a>), attach an event handler that sets the variable to true
On onbeforeunload, check the value of the variable to see if a link has been clicked or not. If it is still false, then they haven't clicked a link so give them the alert.

You need to explicitly specify events for which you don't want to show confirmation dialogue box.
var validNavigation = 0;
function bindDOMEvents() {
// Attach the event keypress to exclude the F5 refresh
$(document).keydown(function(e)
{
var key = e.which || e.keyCode;
if (key == 116)
{
validNavigation = 1;
};
});
// Attach the event click for all links in the page
$("a").bind("click", function()
{
validNavigation = 1;
});
// Attach the event submit for all forms in the page
$("form").bind("submit", function()
{
validNavigation = 1;
});
// Attach the event click for all inputs in the page
$("input[type=submit]").bind("click", function()
{
validNavigation = 1;
});
};
$(document).ready(function()
{
bindDOMEvents();
window.onbeforeunload = function () {
console.log(validNavigation);
if (validNavigation == '1')
{
console.log("No Alert.. Continue");
}
else
{
return false;
}
};
});

This solution worked for me in Firefox with Violentmonkey.
It is used like most of all window.onbeforeunload and check if left mouse button was pressed. So if pressed, this mean, click at free space or link opens - not closing tab.
function DetectBrowserExit()
{
if (butpres == 0) {
//your action before closing tab, alert not showing
}
}
window.onbeforeunload = function(){ DetectBrowserExit(); }
// the key is pressed, then when window.onbeforeunload - link is opening, so, tab not closing
document.addEventListener('mousedown',function(e){
if (e.which == 1) { //1-lbutton 2-mb 3-rb
//e.preventDefault();
butpres = 1
setTimeout(function() {
butpres = 0 //if after 3 seconds the script still works then the link has not been clicked, clear the click and continue to catch new clicks
//alert(butpres);
}, 3000); //Two seconds will elapse and Code will execute.
//alert(butpres);
//command_lock();
}
},false);

Javascript Mailto without Href

I have requirement where clicked on link it should open the mail to be sent the user on whose name i clicked. i am doing it by constructing the Anchor tag and by setting the href attribute, problem i am facing is , our platform has a function which shows alert asking do you want to navigate or no. this alert should not come when i click on my link, but unfortunately it comes when i clicked on link. is there alternative for this?
[Note : i cannot change the platform code]
var htmlElement = $('<a class="b">('+_email+')</a>').attr('href','mailto:'+_email);
i also tried jquery click , but no use
$('.b').click(function() {
window.location = $(this).attr('href');
}).click();

You need to change the code that does the onbeforeunload checking. Normally it is done with a flag that you can set.
You can override the onbeforeunload and reapply it after the link is clicked.
Example:
HTML
<a class="mail" href="mailto:foo#example.com">Mail</a>
<br/>
Link
JavaScript
window.onbeforeunload = function(e) {
return 'Dialog text here.';
};
$(".mail").on("click", function () {
var _onbeforeunload = window.onbeforeunload;
window.onbeforeunload = $.noop;
window.setTimeout( function () {
window.onbeforeunload = _onbeforeunload;
},20);
});
Fiddle
http://jsfiddle.net/vE9E6/

You just need one simple change to your code...
$(document).on("click", "a.b", function(e) {
e.preventDefault();
window.open(this.href);
});
That stops the default action caused by clicking the link, and then uses window.open to open the mailto link in a new window, rather than changing the location. This will stop the onbeforeunload event firing.

How do I animate a clicked link before leaving page?

Here's what I want to achieve:
When an HTML link is clicked, I want to animate it before leaving the page
If the link is opened in a new window/tab, the animation should not take place
How on earth do I achieve this?

You could use javascript
$(function(){
$(".btn").bind("click",function(){
$(this).animate({'left': '100px'}, 100, function(){
window.location.href = index.html
})
})
})
But you'll have to stop the default action if your button is a link.

You'll need to capture the click event, prevent the default action, do the animation, then load the new page.
If using jquery (Available as a jsfiddle):
$('a').click(function (event) {
event.preventDefault();
$(this).animate({
//whatever
}, function() {
location.href = $(this).attr("href");
});
});
Update: Here's the new jsfiddle that accounts for the situation mentioned in the comments, go there for the updated code. The trick is to look for the keypress of ctrl or command, and abort the newly defined animated click handler if either key is pressed.
Note: The window needs focus before it can detect a keypress, in jsfiddle, that means the frame needs focus before it'll work.