Models – AngularJS

Using ng-model directive you bind value of input controls to the application data.

Validating Input using ng-model:
ng-model can be used to validate user input values.

You can get status of application data using ng-model directive.

ng-model provides css according to status.

Given classes can be applied using ng-model directive.
ng-empty
ng-not-empty
ng-touched
ng-untouched
ng-valid
ng-invalid
ng-dirty
ng-pending
ng-pristine

Data Binding:

In AngularJS, data is synchronized between HTML view and model. This synchronization is called Data Binding. This is two way binding. Means, as soon as value of HTML controller is changed, it is reflected in view. And when value of HTML view changes, it is updated in the model.