Error when npm start webpack?

Question

npm

Good day.
I'm trying to learn webpack but I'm getting an error.
As far as I understand the problem is not in npm
But I don’t see the essence of the error.
npm run build works, but this crashes on npm start:

info it worked if it ends with ok
1 verbose cli [
1 verbose cli 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli 'C: \\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'start'
1 verbose cli ]
2 info using [email protected]
3 info using [email protected] 18.4
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle [email protected]~prestart: [email protected]
6 info lifecycle [email protected]~start: [email protected]
7 verbose lifecycle [email protected]~start: unsafe-perm in lifecycle true
8 verbose lifecycle [email protected]~ start: PATH: C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\Users\Admin\Desktop\Projects\webpack-tutorial\node_modules\.bin;C: \Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\nodejs \;C:\Program Files\Git\cmd;C:\Users\Admin\AppData\Local\Microsoft\WindowsApps;C:\Users\Admin\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users \Admin\AppData\Roaming\npm;C:\Users\Admin\AppData\Local\GitHubDesktop\bin
9 verbose lifecycle [email protected]~start: CWD: C:\Users\Admin\Desktop\Projects\webpack-tutorial
10 silly lifecycle [email protected]~start: Args: [ '/d /s /c', 'webpack-dev-server --mode development --open' ]
11 silly lifecycle [email protected]~start: Returned: code: 1 signal: null
12 info lifecycle [email protected] ~start: Failed to exec start script
13 verbose stack Error: [email protected] start: `webpack-dev-server --mode development --open`
13 verbose stack Exit status 1
13 verbose stack at EventEmitter. (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\index.js:332:16)
13 verbose stack at EventEmitter.emit (events.js:315:20)
13 verbose stack at ChildProcess. (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:315:20)
13 verbose stack at maybeClose (internal/child_process.js:1021:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:286:5)
14 verbose pkgid [email protected]
15 verbose cwd C:\Users \Admin\Desktop\Projects\webpack-tutorial
16 verbose Windows_NT 10.0.18363
17 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\ npm\\bin\\npm-cli.js" "start"
18 verbose node v12.18.4
19 verbose npm v6.14.6
20 error code ELIFECYCLE
21 error errno 1
22 error [email protected] start: `webpack-dev-server --mode development --open`
22 error Exit status 1
23 error Failed at the [email protected] start script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]

package.json

{
  "name": "webpack-tutorial",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "build": "webpack",
    "start": "webpack-dev-server --mode development --open"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "webpack": "^5.4.0",
    "webpack-cli": "^4.2.0",
    "webpack-dev-server": "^3.11.0"
  }
}

webpack.config.js

const path = require('path');

module.exports = {
  mode: 'development',
  entry: './src/index.js',

  devServer: {
    contentBase: path.join(__dirname, './src'),
    port: 9000
  },

  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js'
  }

};

Answer 1

I didn’t find out exactly what the problem is, but my unique Google skill turned out to be launched via webpack serve
https://github.com/webpack/webpack-dev-server/issu... Config
code