Warn on unsaved changes doesn't work

[sejal27]

I replaced my current multi select item with select 2 plug in and it had Warn on Unsaved Changes set to Ignore. But when I refresh the page, it still prompts for unsaved changes.

[steffi80]

I have the same issue. @sejal27 did you find a way to ignore unsaved changes?

[tonupold]

I have the same issue: Apex 19.1.0.00.15 and Select2 version 3.0.3.

Traced down that it happens when "Display null value" is set to NO

So workarund is to leave "Display null value" to YES on SELECT2 item when "Warn on Unsaved Changes" is set to "Ignore".

The reason is that apex.page.isChanged() returns True, because the $('#P1_SELECT2_ITEM').val() returns Null. But on normal select items the $('#P1_SELECT_ITEM').val() returns empty string "".

To repeat it set "Execute when Page Loads" to :

alert(apex.page.isChanged()); // true
alert($('#P1_SELECT2_ITEM').val()); // null

In apex "desktop_all.min.js?v=19.1.0.00.15" the situation happens in function "apex.item(x).isChanged()" here as p():

[rimblas]

@tonupold just a debugging tip, if you turn on Debug on the page, the desktop_all.min.js file will get exploded into all the un-minified individual components making it very easy to track the correct code.
The code you identified is part of apex/item.js and in particular the isChanged function.
Perhaps the plugin should have it's own isChanged callback as highlighted below.
Not sure... have not looked into the issue in detail.

[MichelVogelpoel]

In Apex 18.2 we still found this issue when using Select2 plugin.
As a workaround I have added the following class in the page Item Advanced CSS classes: js-ignoreChange
Now I don't receive the popup any more if I change in the item with Select2 type