无法在新电脑上使用 ionic - 无法为空白项目提供服务

Question

我电脑上的磁盘最近损坏了。我不得不把它换掉。替换后我在重新安装 ionic 时遇到了一些严重的问题。

重新安装后 node.js - 13.7.0

然后在运行ning

之后在 cmd 中

 npm install -g ionic

我收到以下警告，但似乎安装正常。

 npm WARN deprecated superagent@4.1.0: Please note that v5.0.1+ of superagent removes User-Agent 
  header by default, therefore you may need to add it yourself (e.g. GitHub blocks requests without a 
 User- 
  Agent header).  This notice will go away with v5.0.2+ once it is released.
  C:\Users\stephen\ionic -> C:\Users\stephen\node_modules\ionic\bin\ionic
  + ionic@5.4.15
  added 247 packages from 154 contributors in 18.455s

我检查了版本

 ionic version

返回 5.4.15 所以安装正常

但是运行宁

之后

 ionic start

和运行一个空白项目我得到以下错误。

 npm WARN karma-jasmine-html-reporter@1.5.1 requires a peer of jasmine-core@>=3.5 but none is 
 installed. You must install peer dependencies yourself.
 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules\webpack- 
 dev-server\node_modules\fsevents):npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: 
 Unsupported platform for fsevents@1.2.11: wanted {"os":"darwin","arch":"any"} (current: 
 {"os":"win32","arch":"x64"})
 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 
 (node_modules\watchpack\node_modules\fsevents):
 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: 
 wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 
 (node_modules\karma\node_modules\fsevents):
 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: 
 wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 
 (node_modules\@angular\compiler-cli\node_modules\fsevents):
 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: 
 wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.2 (node_modules\fsevents):
 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: 
 wanted 
 {  "os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

 npm ERR! code EEXIST
 npm ERR! path C:\Users\stephen\test3\node_modules\browserslist\cli.js
 npm ERR! dest C:\Users\stephen\test3\browserslist
 npm ERR! EEXIST: file already exists, cmd shim 
'C:\Users\stephen\test3\node_modules\browserslist\cli.js' 
 -> 
'C:\Users\stephen\test3\browserslist'
npm ERR! File exists: C:\Users\stephen\test3\browserslist
npm ERR! Remove the existing file and try again, or run npm
npm ERR! with --force to overwrite files recklessly.


npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\stephen\AppData\Roaming\npm-cache\_logs20-01-31T11_10_22_715Z- 
debug.log
[ERROR] An error occurred while running subprocess npm.

它确实创建了空白项目，但我尝试为它提供服务时出现以下错误：

 ionic : The term 'ionic' is not recognized as the name of a cmdlet, function, script file, or 
 operable program. 
 Check the spelling of the name, or if a 
 path was included, verify that the path is correct and try again.
 At line:1 char:1
 + ionic serve
 + ~~~~~
 + CategoryInfo          : ObjectNotFound: (ionic:String) [], CommandNotFoundException
 + FullyQualifiedErrorId : CommandNotFoundException

我看到他们已经更新到 ionic 5，我猜这是问题所在。如何安装 ionic 4？？？

Answer 1

您应该按照官方指南 here 并使用 npm install -g @ionic/cli 安装，而不仅仅是 npm install -g ionic

Answer 2

出现问题是因为我在桌面上保存了离子文件，离子安装前。

我卸载了ionic，node.js。将所有文件移动到外部硬盘驱动器并关闭我的电脑。

重新启动我的电脑，重新安装 node.js 和 ionic。

无法在新电脑上使用 ionic - 无法为空白项目提供服务

Unable to use ionic on new pc - cannot serve a blank project

ionic-framework

angular

capacitor