app.component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  author = getAuthor();
  title = `my-app by ${this.author}`;
}

function getAuthor() {
  const obj = { name: 'songthamtung' };
  return obj;
}