Question

我创建了一个简单的React App，但是当我要使用cmd“ npm start”运行它时，会引发很多错误。我还在系统上重新安装了节点js，并多次安装了node_modules。但一切都会失败。我也曾尝试在系统上运行其他项目，但出现了几乎相同类型的错误。

C:\Users\Administrator\Desktop\reactApp>npm start

> testapp@1.0.0 start C:\Users\Administrator\Desktop\reactApp
> webpack-dev-server --mode development --open --hot

0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli   'C:\\Users\\Administrator\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli   'start' ]
2 info using npm@6.8.0
3 info using node@v11.10.1
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle testapp@1.0.0~prestart: testapp@1.0.0
6 info lifecycle testapp@1.0.0~start: testapp@1.0.0
7 verbose lifecycle testapp@1.0.0~start: unsafe-perm in lifecycle true
8 verbose lifecycle testapp@1.0.0~start: PATH: C:\Users\Administrator\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\Users\Administrator\Desktop\reactApp\node_modules\.bin;C:\Users\Administrator\AppData\Roaming\npm;C:\Program Files\nodejs\;C:\Program Files\Microsoft MPI\Bin\;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Git\cmd;C:\Program Files\TortoiseSVN\bin;C:\Program Files\TortoiseGit\bin;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5.2 & MySQL Utilities 1.5.2 1.5\;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5.2 & MySQL Utilities 1.5.2 1.5\Doctrine extensions for PHP\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files\dotnet\;C:\Program Files (x86)\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\Microsoft VS Code\bin;C:\Program Files (x86)\Yarn\bin\;C:\Program Files\nodejs\;C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps;C:\Users\Administrator\AppData\Roaming\npm
9 verbose lifecycle testapp@1.0.0~start: CWD: C:\Users\Administrator\Desktop\reactApp
10 silly lifecycle testapp@1.0.0~start: Args: [ '-c', 'webpack-dev-server --mode development --open --hot' ]
11 info lifecycle testapp@1.0.0~start: Failed to exec start script
12 silly lifecycle testapp@1.0.0~start: Returned: code: -4058  signal: null
13 info lifecycle testapp@1.0.0~start: Failed to exec start script
14 verbose stack Error: testapp@1.0.0 start: `webpack-dev-server --mode development --open --hot`
14 verbose stack spawn bash ENOENT
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:246:19)
14 verbose stack     at onErrorNT (internal/child_process.js:427:16)
14 verbose stack     at processTicksAndRejections (internal/process/next_tick.js:76:17)
15 verbose pkgid testapp@1.0.0
16 verbose cwd C:\Users\Administrator\Desktop\reactApp
17 verbose Windows_NT 10.0.17134
18 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Administrator\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "start"
19 verbose node v11.10.1
20 verbose npm  v6.8.0
21 error file bash
22 error path bash
23 error code ELIFECYCLE
24 error errno ENOENT
25 error syscall spawn bash
26 error testapp@1.0.0 start: `webpack-dev-server --mode development --open --hot`
26 error spawn bash ENOENT
27 error Failed at the testapp@1.0.0 start script.
27 error This is probably not a problem with npm. There is likely additional logging output above.
28 verbose exit [ 1, true ]


npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2019-03-06T12_08_45_188Z-debug.log

C:\Users\Administrator\Desktop\reactApp>

Answer 1

我认为您忘记在项目目录中运行npm install ，或者在运行webpack-dev-server之前忘记安装npm start。

此问题在GitHub上使用相同的解决方案几乎完全相同：https://github.com/vuejs/vue-cli/issues/486

Answer 2

我认为，解决此问题的最佳方法是先转到以下路径并应用这些更改，然后重新启动系统，然后重试。

控制面板>系统和安全性>系统>高级系统设置>环境变量并设置系统变量路径C：\ Windows \ System32 \变量并重新启动系统。

使用cmd在React Js App中启动时出现npm start错误

2 个答案: