Angular2中的NPM安装错误

Question

当我键入npm install时，我是angular2的初学者，出现以下错误：

npm WARN optional Skipping failed optional dependency /chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.0.14
npm ERR! Windows_NT 10.0.10586
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install"
npm ERR! node v6.3.0
npm ERR! npm  v3.10.3
npm ERR! file C:\Users\SIDAHMED\AppData\Roaming\npm-cache\chalk\1.1.3\package\package.json
npm ERR! code EJSONPARSE

npm ERR! Failed to parse json
npm ERR! Unexpected token '\u0000' at 1:1
npm ERR!
npm ERR! ^
npm ERR! File: C:\Users\SIDAHMED\AppData\Roaming\npm-cache\chalk\1.1.3\package\package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! This is not a bug in npm.
npm ERR! Tell the package author to fix their package.json file. JSON.parse

npm ERR! Please include the following file with any support request:
npm ERR!     C:\Users\SIDAHMED\Documents\angular2\npm-debug.log

package.json文件：

{
  "name": "ng2-test",
  "version": "1.0.0",
  "scripts": {
    "start": "concurrent \"npm run tsc:w\" \"npm run lite\" ",    
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "lite": "lite-server",
    "typings": "typings",
    "postinstall": "typings install" 
  },
  "license": "ISC",
  "dependencies": {
    "angular2": "2.0.0-beta.7",
    "systemjs": "0.19.22",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.3",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.2",
    "zone.js": "0.5.15"
  },
  "devDependencies": {
    "concurrently": "^2.0.0",
    "lite-server": "^2.1.0",
    "typescript": "^1.7.5",
    "typings":"^0.6.8"
  }
}

我试过npm install angular2@2.0.0-alpha.32 ，当我输入npm start出现以下错误消息：

> ng2-test@1.0.0 start C:\Users\SIDAHMED\Documents\angular2
> concurrent "npm run tsc:w" "npm run lite"

'concurrent' n’est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.

npm ERR! Windows_NT 10.0.10586
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v6.3.0
npm ERR! npm  v3.10.3
npm ERR! code ELIFECYCLE
npm ERR! ng2-test@1.0.0 start: `concurrent "npm run tsc:w" "npm run lite" `
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ng2-test@1.0.0 start script 'concurrent "npm run tsc:w" "npm run lite" '.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the ng2-test package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     concurrent "npm run tsc:w" "npm run lite"
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs ng2-test
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls ng2-test
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     C:\Users\SIDAHMED\Documents\angular2\npm-debug.log

Answer 1

您可以尝试执行以下步骤吗？

1. 从您的项目中删除node_modules文件夹。
2. 运行“ npm cache clean”命令。
3. 运行“ npm install”命令。

我已经在http://jsonlint.com/上验证了您的package.json，并且看起来有效的JSON-

根据您提供的package.json，您正在使用"angular2": "2.0.0-beta.7" ，这是一个非常旧的版本。 Angular2的当前版本是2.0.0-rc.4。 您可以在这里找到更多信息-https: //angular.io/guide/quickstart

看看是否有帮助。