Angularjs - Display Button On Successful Input Collection Entry

I can't seem to update my ng-if to update on input entry and completion of entire row of input controls. I want to evaluate ng-if (look at button) each time I enter a new data in

Solution 1:

You can call the method in ng-blur to change a flag attribute. It will be executed when an element has lost focus.

On ng-if you put the flag attribute condition.

ng-blur