A form creates a cohesive, effective, and compelling data entry experience. An Angular form coordinates a set of data-bound user controls, tracks changes, validates input, and presents errors.

The Angular 2 form discussed in this chapter takes advantage of the following framework features to provide support for data modification, validation and more:

• An Angular HTML form template.
• A form component class with a Component decorator.
• The ngSubmit directive for handling the form submission.
• Template local variables such as #heroForm, #name, #alter-ego and #power.
• The ngModel directive for two-way data binding.
• The ngControl for validation and form element change tracking.
• The local variable’s valid property on input controls to check if a control is valid and show/hide error messages.
• Controlling the submit button's enabled state by binding to NgForm validity.
• Custom CSS classes that provide visual feedback to users about invalid controls.

• AngularJS - HTML enhanced for web apps!
• Twitter Bootstrap - great UI boilerplate for modern web apps