Angular filter and sorting employee list

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

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  name = 'Angular';
  sortName = '';
  employees: Array<any> = [
    { id: 1, name: 'hardik', age: 29, salary: '60000' }, 
    { id: 2, name: 'parth', age: 27, salary: '50000' }, 
    { id: 3, name: 'deepak', age: 29, salary: '50000' },
    { id: 4, name: 'john', age: 29, salary: '50000' }
  ];

  filterValue: Array<any> = [];
  order: boolean = false;
  constructor() {
    this.filterValue = this.employees;
  }

  ngOnInit() {

  }

  filterByText(initial: string) {
    this.employees = this.filterValue;
    this.employees = this.employees.filter(i => i.name.toLowerCase().indexOf(initial.toLocaleLowerCase()) !== -1);
    console.log(this.employees);
  }

  sortData() {
    if (this.order) {
      this.employees = this.employees.sort((i, j) => (j.id > i.id ? -1 : 1));
    }
    else {
      this.employees = this.employees.sort((i, j) => (j.id > i.id ? 1 : -1));
    }
    this.order = !this.order;
    console.log(this.order);
  }
}
<ul>
  <li *ngFor="let e of employees">{{e.name}}
  </li>
</ul>
filter : <input type="text" (keyup)="filterByText($event.target.value)">
<input type="button" (click)="sortData(order)" [value]="order ? 'Asc' : 'Desc'">