在angular 10中使用异步服务方法作为工厂提供程序

import { Injectable } from '@angular/core';

@Injectable()
export class MyService {
  async getData(): Promise<any> {
    // 异步操作，例如从服务器获取数据
    const response = await fetch('https://example.com/api/data');
    const data = await response.json();
    return data;
  }
}

import { NgModule } from '@angular/core';
import { MyService } from './my.service';

@NgModule({
  providers: [
    {
      provide: MyService,
      useFactory: () => {
        const service = new MyService();
        return service.getData(); // 返回一个Promise，在解析时创建并返回服务实例
      }
    }
  ]
})
export class MyModule { }

import { Component } from '@angular/core';
import { MyService } from './my.service';

@Component({
  selector: 'app-my-component',
  template: `
    <div>{{ data }}</div>
  `
})
export class MyComponent {
  data: any;

  constructor(private myService: MyService) {
    this.myService.getData().then(data => {
      this.data = data;
    });
  }
}