Angular 8:如何获取表的过滤值索引

<input type="text" [(ngModel)]="filterValue" placeholder="Filter">
<table>
  <thead>
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
      <th>Column 3</th>
    </tr>
  </thead>
  <tbody>
    <tr *ngFor="let item of items | filter:filterValue; let i = index">
      <td>{{ item.column1 }}</td>
      <td>{{ item.column2 }}</td>
      <td>{{ item.column3 }}</td>
    </tr>
  </tbody>
</table>

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'filter'
})
export class FilterPipe implements PipeTransform {
  transform(items: any[], filterValue: string): any[] {
    if (!items || !filterValue) {
      return items;
    }
    return items.filter(item => {
      // 这里可以根据需要自定义过滤逻辑
      return item.column1.includes(filterValue) ||
             item.column2.includes(filterValue) ||
             item.column3.includes(filterValue);
    });
  }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { AppComponent } from './app.component';
import { FilterPipe } from './filter.pipe';

@NgModule({
  declarations: [
    AppComponent,
    FilterPipe
  ],
  imports: [
    BrowserModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }