Angular 4: how to react to @input variable changes [duplicate]

Question

I have an input variable called model for childComponent. @Input () model: any;

I have a parent control parentControl that send the updated input variable to childComponent.

How do I code childComponent to react to model changes? I want a childComponent call made when model changes.

Thoughts?

Answer 1

Consider using ngOnChanges() lifecycle

@Input() model: any;
ngOnChanges(model: any) {
    this.doSomething(model);
}