Simple Angular directive to force data to be bound even when it's deemed invalid by some validator

forceDatabinding.js

app.directive('forceDatabinding', function() {
  return {
    require: 'ngModel',
    link: function(scope, element, attrs, ngModel) {
      ngModel.$parsers.push(function(value) {
        return value || ngModel.$viewValue;
      });
    }
  };
});