How to check for dirty flag - javascript

I was wondering what is the best way of checking if a page is dirty if a user chooses to navigate it from it. For example, there is a registration form and the user enters all his information. Then accidentally clicks on a link to navigate from it.
I found this on the web where it checks if a page is dirty if a person makes changes to any of the form input values.
<script type="text/javascript">
var isDirty = false;
var msg = 'You haven\'t saved your changes.';
$(document).ready(function(){
$(':input').change(function(){
if(!isDirty){
isDirty = true;
}
});
window.onbeforeunload = function(){
if(isDirty){
return msg;
}
};
});
</script>
So this works great. But how do I exclude some links that are pop-ups? Is there a better way of doing this?

You should add onclick event listener on these inputs and "return false;"
Something like
$('a.className="popup"').onclick = function(){return false};
or
Text

Related

Dirty form check - beforeunload confirmation not working

I am attempting to simply capture when my form is dirty and if it has been changed, alert the user before they leave the page without saving.
Here is my current code:
<script>
var form = $('#MyForm'),
originalForm = form.serialize()
$(window).bind('beforeunload', function () {
if (form.serialize() != originalForm) {
return 'You have unsaved changes';
}
});
</script>
Nothing happens above. I can use beforeunload method just fine until I attempt to add the "dirty" field check, then nothing occurs.
Any help?

alerting users before they leave page if they filled some fields

I want to use two javascript events: onbeforeunload and inside it I need to use onhashchange. The point is on leaving the page if user has filled some fields then the confirmation message appear warning user whether they want to stay on page or leave.
My code is following
window.onbeforeunload = function (e) {
window.onhashchange = function (r) { return ''; }
};
But the above code does not seem to be working? what am I doing wrong?
[Updated]
Again, what I am trying to achieve is I want to alert a user if the leave the page and if they have filled some fields on the page
You can try
window.onbeforeunload = function (e) {
if (content on page changed) { confirm("Do you want to leave page?") }
};
window.onhashchange = function (r) { if (content on page changed) { confirm("Do you want to leave page?") } }
I have just given pseudo code, you can replace with actual code.
Basic mistake is you are trying to bind event onhashchange in onbeforeunload.

How to identify when the back button has been hit and do some js operation

Is there any way that I can identify that the user clicked the "Back" button before this page?
This is the none-existed example I have in my head:
window.onload = new function(e){
if(e.type == "back"){
//do some operation
}
}
Is there a way to know that?
Thanks
Within your own site, and with a lot of work, you could do it with a cookie, but you would have to hook every link.
yes, easily.
window.onbeforeunload = askConfirm;
function askConfirm(){
return "You have unsaved changes.";
}

Intercept selection in window.onbeforeunload dialog

in my web application if the user leaves the current page without having saved changes in the form a pop up window is opened to alert him about that.
For the pop up I use some scripts code injected from codebehind (C#):
var Confirm = true;
window.onbeforeunload = confirmClose;
function confirmClose()
{
if (!Confirm) return;
if(/*CHECK CHANGE CONDITION IS TRUE*/)
{ return " + WARN_message + "; }
}
I would need to intercept whether the user click on cancel or ok button.
I tried like:
var button_pressed = window.onbeforeunload = confirmClose;
But it returns always true.
How can get which button was pressed?
Thanks
Not possible. There is no event associated with the buttons.
What you might be able to do was to see if the user came back by setting a value or perhaps a cookie in the page in the onbeforeunload and test if it is there after some time has passed
but see the duplicate Way to know if user clicked Cancel on a Javascript onbeforeunload Dialog?

window.onbeforeunload tips and tricks

I'd like to create an onbeforeunload "You have made edits to the page. Stay On This Page, Leave This Page" jQuery plugin.
The plugin will need to:
Accept a containing element. $(".editableFieldContainer").beforeUnload()
Autodetect changes to not(:hidden) input/textarea/selects.
Prompt user to stay on the page if elements within the containing element have changed.
except if the page was submitted via form.
except if the page/user wants to cancel the changes, e.g., a "Cancel" link/button was pressed.
Something like this (but not quite, it is missing some features):
(function(){
var changed = false;
$.beforeUnloadCanceled = false;
$.fn.beforeUnload = function(){
$.beforeUnloadCanceled = true;
return $(this).delegate("input,select,textarea", "change", function(){
changed = true;
});
});
window.onbeforeunload = function(){
if(changed && !beforeUnloadCanceled){return "You have made edits to the page.";}
};
}());
Is there already a decent plugin that does this?
This could be what your looking for.
jquery.wtFormDirty-2.0.2.js

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