javascript - rxjs/订阅没有导出成员 'Subscription'

Question

我将我的 Angular 项目和所有依赖项更新为最新版本。没有太多麻烦，我解决了大部分依赖问题，但我仍然停留在 RxJS 上。这是我的 package.json:

  "dependencies": {
    "@angular-devkit/build-angular": "^0.6.0",
    "@angular/animations": "^6.0.0",
    "@angular/common": "^6.0.0",
    "@angular/compiler": "^6.0.0",
    "@angular/core": "^6.0.0",
    "@angular/forms": "^6.0.0",
    "@angular/http": "^6.0.0",
    "@angular/platform-browser": "^6.0.0",
    "@angular/platform-browser-dynamic": "^6.0.0",
    "@angular/router": "^6.0.0",
    "angular-bootstrap-md": "^6.0.1",
    "core-js": "^2.5.5",
    "font-awesome": "^4.7.0",
    "rxjs": "^6.1.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular/cli": "~6.0.0",
    "@angular/compiler-cli": "^6.0.0",
    "@angular/language-service": "6.0.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "electron": "^1.8.3",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.2",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.4.2",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^1.0.0",
    "protractor": "~5.3.1",
    "ts-node": "~6.0.2",
    "tslint": "~5.10.0",
    "typescript": "~2.7.2"

我只从 RxJS 导入两个模块:

import { fromPromise } from 'rxjs/observable/fromPromise';
import { Subscription } from 'rxjs/Subscription';

他们都给出了同样的错误:

    [ts] Module '"***/node_modules/rxjs/Subscription"' has no exported
 member 'Subscription'.

fromPromise 完全一样。这是我从 Subscribtion.d.ts 得到的错误消息(我没有以任何方式修改代码)

更新:

下面的答案解决了 Subscription 的问题，但是 fromPromise 仍然给出同样的问题，即使它被正确导出:

export * from 'rxjs-compat/observable/fromPromise';

Answer 1

RxJS 6 有很多重大变化。例如，原型(prototype)方法为

myObservable.map(data => data * 2)

将不再起作用，必须替换为

myObservable.pipe(map(data => data * 2))

可在此处找到所有详细信息:https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md

---

在修复所有重大更改之前，您可以使用 rxjs-compat ( https://github.com/ReactiveX/rxjs/tree/master/compat ) 使旧代码再次工作。

This package is required to get backwards compatibility with RxJS previous to version 6. It contains the imports to add operators to Observable.prototype and creation methods to Observable.

输入这个来安装它:

npm install -s rxjs-compat