相关疑难解决方法(0)

我正在学习React.js,我正在使用Windows 8 OS.i已导航到我的根文件夹

1.Created the package.json file by npm init
2. install webpack by npm install -S webpack.now webpack has been downloaded to my modules folder
3. install webpack globally by typing npm install webpack -g
4. i am also having a webpack.config.js in my root folder which contains the source and ouput directory
5. when i type the webpack command i am getting the below error.

webpack不被识别为内部或外部命令,可操作程序或批处理文件

我已经在新机器上安装了最新的angular-cli,我正在尝试使用之前的cli版本生成一个项目

我得到了这个警告

Your global Angular CLI version (1.6.4) is greater than your local
version (1.6.3). The local Angular CLI version is used.

To disable this warning use "ng set --global warnings.versionMismatch=false".

虽然该项目正常工作,我有什么办法,以更新我的项目与最新的dependecies,并避免这个消息(避免不抑制!)

这是我的package.json

{
    "name": "AngularTest",
    "version": "0.0.0",
    "license": "MIT",
    "angular-cli": {},
    "scripts": {
        "ng": "ng",
        "start": "ng serve --host 0.0.0.0 --port 4200",
        "hmr": "ng serve --host 0.0.0.0 --port 4200 4201 --hmr -e=hmr",
        "test": "ng test",
        "pree2e": "webdriver-manager update --standalone false --gecko false",
        "e2e": "protractor"
    },
    "private": true,
    "dependencies": { …

我注意到我安装了本地和全局 Angular/cli 软件包。

与全局包相比，何时使用 Angular/cli 本地包？

我正在尝试将角度更新为最新版本.

我更新了global @ angular/cli

npm install -g @angular/cli

然后,当我尝试更新local @ angular/cli时,ng update @angular/cli我收到此错误:

Error: Unexpected end of JSON input
Unexpected end of JSON input

这是我的package.json

{
  "name": "apimap",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.11",
    "@angular/cdk": "^5.2.5",
    "@angular/common": "^5.2.11",
    "@angular/compiler": "^5.2.11",
    "@angular/core": "^5.2.11",
    "@angular/flex-layout": "^2.0.0-rc.1",
    "@angular/forms": "^5.2.11",
    "@angular/http": "^5.2.11",
    "@angular/material": "^5.2.5",
    "@angular/platform-browser": "^5.2.11",
    "@angular/platform-browser-dynamic": "^5.2.11", …