The Safe Navigation Operator helps with preventing null-reference exceptions in component template expressions. It returns object property value if it exists or null otherwise.

<p> I will work even if student is null or undefined: {{student?.name}} </p>

Links

• https://github.com/angular/angular/issues/791

{{a?.b?.c}} 

(_co.a == null)? null: ((_co.a.b == null)? null: _co.a.b.c));