如何使用angular8使自定义管道在反应式表单中工作

ng generate pipe custom-pipe

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

@Pipe({
  name: 'customPipe'
})
export class CustomPipe implements PipeTransform {

  transform(value: string): any {
    // 在这里实现你的转换逻辑
    return value.toUpperCase(); // 示例：将字符串转换为大写
  }

}

import { Component } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  form: FormGroup;

  constructor(private fb: FormBuilder) {
    this.form = this.fb.group({
      name: ['']
    });
  }
}

<form [formGroup]="form">
  <input formControlName="name" type="text">
  <p>Formatted Name: {{ form.get('name').value | customPipe }}</p>
</form>

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

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