如何过滤特定搜索框中的数据，而不是使用angular过滤整个数据集

<!-- HTML 模板 -->
<input type="text" [(ngModel)]="searchKeyword" (input)="filterData()" placeholder="请输入搜索关键词">
<ul>
  <li *ngFor="let item of filteredData">{{ item }}</li>
</ul>

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

@Component({
  selector: 'app-filter',
  templateUrl: './filter.component.html',
  styleUrls: ['./filter.component.css']
})
export class FilterComponent {
  data: string[] = ['Apple', 'Banana', 'Orange', 'Mango'];
  filteredData: string[] = [];
  searchKeyword: string = '';

  filterData() {
    this.filteredData = this.data.filter(item => item.includes(this.searchKeyword));
  }
}