可观察类型上不存在 mergeMap [英] mergeMap does not exist on type observable

问题描述

我试图在 rxjs6 中使用 mergeMap 并且我收到此错误:

I am trying to use mergeMap in rxjs6 and i am getting this error:

属性mergeMap"不存在于类型Observable<{}>"

我试过 import 'rxjs/add/operator/mergeMap'; 但它不起作用.

I have tried import 'rxjs/add/operator/mergeMap'; and it is not working.

我做错了什么?

import {from, Observable} from 'rxjs';

export class Test {

    public doSomething(): Observable<any> {
        return from(...).mergeMap();
    }

}

推荐答案

没错，从 RxJS 6 开始，运算符的补丁"样式已被删除.您最好更新代码以仅使用可管道"运算符或安装 rxjs-compat 向后兼容 RxJS 5 的包.

That's correct, the "patch" style of operators has been removed since RxJS 6. You should better update your code to use only "pipeable" operators or install rxjs-compat package that provides backwards compatibility with RxJS 5.

更详细的描述见官方文档:https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md

For more detailed description see official doc: https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md

...更具体地说，这部分:https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md#backwards-compatibility

... more specifically this part: https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md#backwards-compatibility

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