安装bootstrap 4后，“@ angular / core”出现Angular 5错误

Question

我正在使用visual studio 2017中的angular 5和.net core2构建我的第一个应用程序;我使用.Net core2来创建API并通过模型处理数据......这些API使用angular 5从客户端调用;为了使我的网络应用程序响应，我决定使用Bootstrap 4;在我安装它之前，依赖性工作正常，一切都很好，你可以在这里看到：

但是当我使用此命令成功安装bootstrap之后：npm install bootstrap --save突然出现依赖项中的错误，我无法再构建我的解决方案...

为什么会出现此错误，如何解决？请注意，我使用2017年的visual studio创建了一个纯粹的angular5，我做了同样的事情 - ＆gt;安装成功，我能够使用bootstrap 4;

错误：

更新

为了解决我的错误，我试过这个：

npm install

npm i @angular/core

但是抛出了以下错误：

  

无法安装“”@angular \ core“^ 5.2.0”，“因为它没有   包含package.json文件

这是我的package.json文件：

{
  "name": "angular",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.0",
    "@angular/common": "^5.2.0",
    "@angular/compiler": "^5.2.0",
    "@angular/core": "\"@angular/core\"^5.2.0\",",
    "@angular/forms": "^5.2.0",
    "@angular/http": "^5.2.0",
    "@angular/platform-browser": "^5.2.0",
    "@angular/platform-browser-dynamic": "^5.2.0",
    "@angular/router": "^5.2.0",
    "bootstrap": "^4.1.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.5.6",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "~1.7.3",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.5.3"
  }
}

Answer 1

"@angular/core": "\"@angular/core\"^5.2.0\",",错误。

替换 "@angular/core": "^5.2.0"

与 function searchForArray(haystack, needle){ var i, j, current; for(i = 0; i < haystack.length; ++i){ if(needle.length === haystack[i].length){ current = haystack[i]; for(j = 0; j < needle.length && needle[j] === current[j]; ++j); if(j === needle.length) return i; } } return -1; } var arr = [[1,3],[1,2]]; var n = [1,3]; console.log(searchForArray(arr,n));