Difference between [(ngModel)] and [ngModel] for binding state to property?

Question

Here is a template example:

Answer 1

It's quite simple [] => component to template () => template to component [(ngModel)] is a contracted form of [ngModel]="currentHero.name" (ngModelChange)="currentHero.name=$event">

More detail here : https://angular.io/docs/ts/latest/guide/template-syntax.html#!#ngModel