doneit-web/src/app/services/functions/initials.service.ts

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

@Injectable({
  providedIn: 'root'
})
export class InitialsService {

  constructor() { }

  getInitials(name:string){
    let names = name.split(' '),
    initials = names[0].substring(0, 1).toUpperCase();
    if (names.length > 1) {
      initials += names[names.length - 1].substring(0, 1).toUpperCase();
    }
    return initials;
    }
}