Angular 5，Observable 和异步函数 [英] Angular 5, Observable and async function

问题描述

我一直在尝试创建一个类似于 http.get(...) 但没有做任何 http 的函数.基本上我所做的是我定义了一个函数

I have been trying to create a function that is similar to http.get(...) but not doing any http. Basically what I have done is that I defined a function

async myFunc(): Observable<string> {
 var myObservable: Observable<string>;

  //.....
  // the rest of the function's code comes here
  // ...

 return myObservable;
}

但是我总是收到一个错误，说它与 ES5/ES3 不兼容，应该返回一个 Promise 对象?但我想知道 Angular 5 的 http.get 函数是如何实现的?显然它返回一个 Observable.

But I always get an error that it is not compatible with ES5/ES3 and should return a Promise object? But I am wondering how it became possible with Angular 5's http.get function? Where clearly it returns an Observable.

谢谢，
阿塔尼斯

Thanks,
Artanis

推荐答案

异步/等待功能与承诺一起工作.您可以使用 Observable.defer 来定义具有异步/等待功能的 Observable.

The async/await functionality works with promises. You can use Observable.defer to define an Observable with async/await functionality.

查看此帖子了解更多信息:https://medium.com/@benlesh/rxjs-observable-interop-with-promises-and-async-await-bebb05306875

See this post for more information: https://medium.com/@benlesh/rxjs-observable-interop-with-promises-and-async-await-bebb05306875

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