How do you disable the submit button after a single click to prevent multiple submissions in Angularjs?

Question

I\'ve looked all over the web including several stack overflow examples for a solution to the question. To be specific, I tried this:

Answer 1

Add and add isDisabled in ng-disabled attribute ng-disabled="isDisabled" , so when you select checkbox button is disabled and deselect checkbox, enable button.

Please see link http://plnkr.co/edit/e3w54TZEmfj8h5O6BX7B?p=preview