numberpbject7.js

import { Component, Input, ChangeDetectionStrategy } from '@angular/core';

@Component({
    selector: 'app-message',
    changeDetection: ChangeDetectionStrategy.OnPush,
    template: `
    <h2>
    Hey {{person.firstname}} {{person.lastname}} !
    </h2>
    `
})
export class MessageComponent {

    @Input() person;
}