How to track the change of @Input variable in the component?

Question

Angular

Good afternoon,
There is a component, it has an input parameter In the component, the elements of this array are associated with the form like this
@Input() SafetyIncidents: Array<SafetyIncident>;

<mat-form-field class="col-md-1">
        <input name=SafetyIncidentImpactId [(ngModel)]="Incident.ImpactId" matInput placeholder="Impact ID">
</mat-form-field>

But new array elements can also be added through the code:

addSafetySection() {
      this.SafetyIncidents.push(new SafetyIncident());
    //  console.log("add new incedent");
  }

How to track changes to the SafetyIncidents array?
Alas, I could not find an intelligible example with either subject or observable. The problem is that the form is related specifically to SafetyIncidents, which is not an observable.

Answer 1

everything is in the documentation
https://angular.io/guide/component-interaction#int...
Oh, and more

addSafetySection() {
      this.SafetyIncidents = this.SafetyIncidents.concat(new SafetyIncident());
    //  console.log("add new incedent");
}