类型“Observable<any>"上不存在属性“interval" [英] Property &#39;interval&#39; does not exist on type &#39;Observable&lt;any&gt;&#39;

问题描述

我的 Angular2 组件类的构造函数中有以下代码:

I have the following code inside the constructor of my Angular2 component class:

Observable.from([1,2,3]).interval(2000).subscribe(e=>{
         console.log(e);
       });

我导入了以下内容:

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/from';
import 'rxjs/add/observable/interval';

我在使用 Angulat CLI 构建我的项目时收到以下错误消息:

I have the following error message while building my project using Angulat CLI:

Property 'interval' does not exist on type 'Observable<any>

我错过了什么?

推荐答案

没错.interval 方法是一个静态方法，只存在于 Observable 类中.换句话说，它不是运算符.

That's correct. The interval method is a static method that exists only on the Observable class. In other words, it's not an operator.

所以你可能想要 delay 或 timeout 代替.

So you probably want delay or timeout instead.

Observable.from([1,2,3])
    .concatMap(val => Observable.of(val).delay(2000))

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