Tooltip does not disappear when 'disabled' toggled programmatically

[spc16670]

Bug description:

Button tooltip does not disappear when 'disabled' flag is toggled programmatically.

Link to minimally-working plunker that reproduces the issue:

Version of Angular, UIBS, and Bootstrap

Angular:
angular-1.5.7
UIBS:
2.3.1
Bootstrap:
3.3.7

Plunker that reproduces the issue: http://plnkr.co/edit/ImxzzVoS29QYD46OtMQ7?p=preview
Hover over the button to see the tooltip
Hover out to see that the tooltip disappears

Then hover over the button again and click on it. You will see the angular-promise-buttons spinner. But when you hover out the tooltip won't disappear because the button is [disabled]

How to fix:
https://github.com/angular-ui/bootstrap/blob/master/src/tooltip/tooltip.js#L403

It looks like attrs.$observe('disabled') is never triggered

so replace

            attrs.$observe('disabled', function(val) {
              if (val) {
                cancelShow();
              }

              if (val && ttScope.isOpen) {
                hide();
              }
            });

with

            scope.$watch(function() {
              return element.attr('disabled');
            }, function(val){
              if (val) {
                cancelShow();
              }

              if (val && ttScope.isOpen) {
                hide();
              }
            });

I'm not 100% sure if it's a correct way but it works. I hope contributors will take a look at this.

Plunker with fixed code http://plnkr.co/edit/ImxzzVoS29QYD46OtMQ7?p=preview
fix is on line 5272

[wesleycho]

@coolfeature can you explain how the disabled is being added/removed? I highly recommend doing so via jqlite, and not any other mechanism (i.e. raw HTMLElement.prototype.setAttribute or HTMLElement.prototype.removeAttribute).

[spc16670]

Hi, I am sorry, I do not work on this code anymore. Please feel free to close if the issue in no longer there.

[tmcgann]

Tooltips in general don't work for me on disabled buttons.

Angular:
1.5.11
UIBS:
2.5.0
Bootstrap:
3.3.7