two way binding with safe navigation operator

Question

What is the best way to use two-way-binding (syntax-sugar) in Angular 2 with the safe navigation operator. I've tried the following.

<input [(ngModel)]="x?.y?.z"> 

But this is not supported.

Is there a way to use sth. like this?

Answer 1

You can split up- and downwards-binding like

<input [ngModel]="x?.y?.z" (ngModelChange)="x?.y?.z ? x.y.z = $event : null">