错误:模板解析错误:在angular中找不到管道'filter‘

<p>{{ 'hello world' | uppercase }}</p>
<p>{{ today | date }}</p>

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { CustomPipe } from './custom.pipe';

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

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

@Pipe({
  name: 'custom'
})
export class CustomPipe implements PipeTransform {
  transform(value: any, arg1: any, arg2: any): any {
    // 这里定义过滤器的逻辑
    return filteredValue;
  }
}

<p>{{ 'hello world' | custom: arg1: arg2 }}</p>