类型“Observable<HttpEvent<>>”不能赋值给类型“Observable<>”

import { Observable, HttpEvent } from '@angular/common/http';

const httpEventObservable: Observable<HttpEvent<any>> = ...;

// 正确的赋值方式
const anotherObservable: Observable<HttpEvent<any>> = httpEventObservable;

import { Observable, HttpEvent } from '@angular/common/http';

const httpEventObservable: Observable<HttpEvent<any>> = ...;

// 使用类型断言
const anotherObservable = httpEventObservable as Observable<HttpEvent<any>>;

import { Observable, HttpEvent } from '@angular/common/http';

const httpEventObservable: Observable<HttpEvent<any>> = ...;

// 使用通配符类型
const anotherObservable: Observable<HttpEvent<any>> = httpEventObservable;

import { Observable, HttpEvent } from '@angular/common/http';

const httpEventObservable: Observable<HttpEvent<any>> = ...;

// 确保泛型类型参数一致
const anotherObservable: Observable<HttpEvent<any>> = httpEventObservable;

import { Observable, HttpEvent } from '@angular/common/http';

// 假设你有一个 Observable<HttpEvent<any>> 类型的变量
const httpEventObservable: Observable<HttpEvent<any>> = new Observable(observer => {
  // 模拟 HTTP 请求
  setTimeout(() => {
    const response: HttpEvent<any> = { type: 'response', body: { data: 'example' } };
    observer.next(response);
    observer.complete();
  }, 1000);
});

// 正确的赋值方式
const anotherObservable: Observable<HttpEvent<any>> = httpEventObservable;

anotherObservable.subscribe(event => {
  console.log(event.body.data); // 输出: example
});