VS 2015 MVC 项目中来自 Angular 和 typescript 的编译错误

Question

我是 Angular 的新手，并在 ASP.Net MVC 项目中实现小步。我从 github 下载了 Angular 快速入门和 Visual Studio 2015 更新 3 的最新打字稿 v 3.2.2.0。我收到以下错误属性提升类型为“主题不可分配给相同的属性”基本类型 Observable'。

other version used:
npm -v is 6.4.1
node -v is 10.15.2

我从 github 下载的 package.json 引用了旧版本。附件是我正在使用的package.json 文件。

我的npm 正在运行，并且能够通过lift-server 托管该网站。

错误 TS2416：“主题”类型中的属性“提升”不可分配 到基本类型“Observable”中的相同属性。键入'（运算符： Operator) => Observable' 不可分配给类型 '（操作员：操作员）=> 可观察的'。输入“可观察” 不可分配给类型“可观察”。类型“T”不可分配 输入“R”

请帮忙。

Error snippet

{
  "name": "angular-quickstart",
  "version": "1.0.0",
  "description": "QuickStart package.json from the documentation, supplemented with testing support",
  "scripts": {
    "build": "tsc -p src/",
    "build:watch": "tsc -p src/ -w",
    "build:e2e": "tsc -p e2e/",
    "serve": "lite-server -c=bs-config.json",
    "serve:e2e": "lite-server -c=bs-config.e2e.json",
    "prestart": "npm run build",
    "start": "concurrently \"npm run build:watch\" \"npm run serve\"",
    "pree2e": "npm run build:e2e",
    "e2e": "concurrently \"npm run serve:e2e\" \"npm run protractor\" --kill-others --success first",
    "preprotractor": "webdriver-manager update",
    "protractor": "protractor protractor.config.js",
    "pretest": "npm run build",
    "test": "concurrently \"npm run build:watch\" \"karma start karma.conf.js\"",
    "pretest:once": "npm run build",
    "test:once": "karma start karma.conf.js --single-run",
    "lint": "tslint ./src/**/*.ts -t verbose"
  },
  "keywords": [],
  "author": "",
  "license": "MIT",
  "dependencies": {
    "@angular/common": "~4.3.4",
    "@angular/compiler": "~4.3.4",
    "@angular/core": "~4.3.4",
    "@angular/forms": "~4.3.4",
    "@angular/http": "~4.3.4",
    "@angular/platform-browser": "~4.3.4",
    "@angular/platform-browser-dynamic": "~4.3.4",
    "@angular/router": "~4.3.4",

    "angular-in-memory-web-api": "~0.3.0",
    "systemjs": "0.19.40",
    "core-js": "^2.4.1",
    "rxjs": "5.0.1",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "concurrently": "^3.2.0",
    "lite-server": "^2.2.2",
    "typescript": "~2.1.0",

    "canonical-path": "0.0.2",
    "tslint": "^3.15.1",
    "lodash": "^4.16.4",
    "jasmine-core": "~2.4.1",
    "karma": "^1.3.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~4.0.14",
    "rimraf": "^2.5.4",

    "@types/node": "^6.0.46",
    "@types/jasmine": "2.5.36"
  },
  "repository": {}
}

Answer 1

尝试升级：

npm install --save rxjs@^6.4.0 这个问题应该已经在 RxJS 6 中修复了。

Answer 2

这里有几个问题。
首先，您的 Typescript 是最新版本。我不确定 Angular 7 是否支持 Typescript 3.2.2。我认为他们会在 Angular 8 很快发布时。 其次，你的 Angular 包已经过时了。如果可能，您应该更新到 Angular 7。
第三，Visual Studio 有时会对您的 ts 配置挑剔。如果上述两个不起作用，请发布您的 ts 配置，以便我们查看。我从 VS 2017 中的 Web 表单模板构建 Angular 应用程序。我使用 Angular CLI 而不是任何 VS 扩展。如果您想了解更多详情，请告诉我。

这是我最近开始的一个项目的 package.json：

  "private": true,
  "dependencies": {
"@angular/animations": "~7.1.0",
"@angular/common": "~7.1.0",
"@angular/compiler": "~7.1.0",
"@angular/core": "~7.1.0",
"@angular/forms": "~7.1.0",
"@angular/platform-browser": "~7.1.0",
"@angular/platform-browser-dynamic": "~7.1.0",
"@angular/router": "~7.1.0",
"classlist.js": "^1.1.20150312",
"core-js": "^2.5.4",
"d3": "^4.10.2",
"d3-array": "^1.2.1",
"d3-brush": "^1.0.4",
"d3-color": "^1.0.3",
"d3-force": "^1.1.0",
"d3-format": "^1.2.0",
"d3-hierarchy": "^1.1.5",
"d3-interpolate": "^1.1.5",
"d3-scale": "^1.0.6",
"d3-selection": "^1.1.0",
"d3-shape": "^1.2.0",
"d3-time-format": "^2.1.0",
"rxjs": "~6.3.3",
"tslib": "^1.9.0",
"web-animations-js": "^2.3.1",
"zone.js": "~0.8.26",
"bootstrap": "4.3.1"
  },
  "devDependencies": {
"@angular-devkit/build-angular": "~0.11.0",
"@angular-devkit/build-ng-packagr": "~0.11.0",
"@angular/cli": "~7.1.3",
"@angular/compiler-cli": "~7.1.0",
"@angular/language-service": "~7.1.0",
"@types/node": "~8.9.4",
"@types/jasmine": "~2.8.8",
"@types/jasminewd2": "~2.0.3",
"codelyzer": "~4.5.0",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~3.1.1",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~1.1.2",
"karma-jasmine-html-reporter": "^0.2.2",
"ng-packagr": "^4.2.0",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tsickle": ">=0.29.0",
"tslib": "^1.9.0",
"tslint": "~5.11.0",
"typescript": "~3.1.6"
  }
}