我将我的角度项目和所有依赖项更新到最新版本。我没有遇到太多麻烦,我解决了大多数依赖问题,但我仍然坚持使用RxJs。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"
我只是从RxJs导入模块:
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
完全相同。以下是我从Subscribtion.d.ts
收到的错误消息(我没有以任何方式修改过代码)
更新:
下面的答案解决了Subscription的问题,但fromPromise
仍然会出现同样的问题,即使它已正确导出:
export * from 'rxjs-compat/observable/fromPromise';
答案 0 :(得分:30)
RxJS 6有很多重大变化。例如,原型方法为
myObservable.map(data => data * 2)
将不再有效,必须由
替换myObservable.pipe(map(data => data * 2))
所有详情均可在此处找到:https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md
在您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)重新使用旧代码。
此软件包需要向后兼容RxJS 它包含要添加运算符的导入
Observable.prototype
和[{1}}的创建方法。
输入以安装它:
Observable
答案 1 :(得分:5)
我希望您的问题能够通过以下声明得到解决
import Subscription from 'rxjs'
答案 2 :(得分:2)
您可以通过以下方式解决此问题:
从“ rxjs”导入{来自};
并且,而不是: return Observable.fromPromise(new Promise((resolve,reject)=> {
现在就做:
从返回(新的承诺((解决,拒绝)=> {
Observable.of
也是如此答案 3 :(得分:0)
afaik Angular 6和rxjs 6尚未兼容,因为他们创建的兼容性https://www.npmjs.com/package/rxjs-compat你必须安装
[UPDATE] fromPromise现在"来自"。 见这里:https://github.com/ReactiveX/rxjs/issues/3525