I have a bit of an esoteric bug with your progress bar which involves placing it inside the button which opens an ng-bootstrap modal. (This is an actual use case for my web application).
The ng-bootstrap modal (https://ng-bootstrap.github.io/#/components/modal) created by the angular team works just fine in IE11 if there is no round-progress bar embedded in the modal button. However, if I put the round-progress-bar in the modal button, the modal opens but when you close the modal, the background remains and the screen is non-reactive.
The console gives the following error: ERROR TypeError: Unable to get property 'apply' of undefined or null reference
Here is a plunker which demonstrates the problem. Try clicking on your round progress bar to open the modal and then close it (in IE11, of course)
I have a bit of an esoteric bug with your progress bar which involves placing it inside the button which opens an ng-bootstrap modal. (This is an actual use case for my web application).
The ng-bootstrap modal (https://ng-bootstrap.github.io/#/components/modal) created by the angular team works just fine in IE11 if there is no round-progress bar embedded in the modal button. However, if I put the round-progress-bar in the modal button, the modal opens but when you close the modal, the background remains and the screen is non-reactive.
The console gives the following error: ERROR TypeError: Unable to get property 'apply' of undefined or null reference
Here is a plunker which demonstrates the problem. Try clicking on your round progress bar to open the modal and then close it (in IE11, of course)
http://plnkr.co/edit/HMJr7J8fRjF7OhAYXjHu?p=preview