Javascript 在node express中找不到模块

在node express中找不到模块

实际代码

const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => {
  res.send('Hello World!')
})

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`)
})

cmd中的错误代码

C:\Users\user\Desktop\project>npm express-v

7.5.3

C:\Users\user\Desktop\project>npm utils-v

7.5.3

C:\Users\user\Desktop\project>节点服务器

node:internal/modules/cjs/loader:928
  throw err;
  ^

Error: Cannot find module './utils'
Require stack:
- C:\Users\user\Desktop\project\node_modules\qs\lib\stringify.js
- C:\Users\user\Desktop\project\node_modules\qs\lib\index.js
- C:\Users\user\Desktop\project\node_modules\express\lib\middleware\query.js
- C:\Users\user\Desktop\project\node_modules\express\lib\application.js
- C:\Users\user\Desktop\project\node_modules\express\lib\express.js
- C:\Users\user\Desktop\project\node_modules\express\index.js
- C:\Users\user\Desktop\project\server.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:925:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (C:\Users\user\Desktop\project\node_modules\qs\lib\stringify.js:3:13)
    at Module._compile (node:internal/modules/cjs/loader:1108:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
    at Module.load (node:internal/modules/cjs/loader:973:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Module.require (node:internal/modules/cjs/loader:997:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\user\\Desktop\\project\\node_modules\\qs\\lib\\stringify.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\qs\\lib\\index.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\middleware\\query.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\application.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\express.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\index.js',
    'C:\\Users\\user\\Desktop\\project\\server.js'
  ]
}

node:internal/modules/cjs/loader:928
  throw err;
  ^

Error: Cannot find module 'utils'
Require stack:
- C:\Users\user\Desktop\project\server.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:925:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (C:\Users\user\Desktop\project\server.js:3:15)
    at Module._compile (node:internal/modules/cjs/loader:1108:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
    at Module.load (node:internal/modules/cjs/loader:973:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ 'C:\\Users\\user\\Desktop\\project\\server.js' ]
}

节点：内部/模块/cjs/加载器：928
犯错误；
^
错误：找不到模块'./utils'
需要堆栈：
-C:\Users\user\Desktop\project\node\u modules\qs\lib\stringify.js
-C:\Users\user\Desktop\project\node\u modules\qs\lib\index.js
-C:\Users\user\Desktop\project\node\u modules\express\lib\middleware\query.js
-C:\Users\user\Desktop\project\node\u modules\express\lib\application.js
-C:\Users\user\Desktop\project\node\u modules\express\lib\express.js
-C:\Users\user\Desktop\project\node\u modules\express\index.js
-C:\Users\user\Desktop\project\server.js
位于Function.Module.\u解析文件名（节点：internal/modules/cjs/loader:925:15）
at功能模块加载（节点：内部/模块/cjs/加载程序：769:27）
at Module.require（节点：内部/模块/cjs/加载器：997:19）
需要时（节点：内部/模块/cjs/helpers:92:18）
反对。（C:\Users\user\Desktop\project\node\u modules\qs\lib\stringify.js:3:13）
at模块编译（节点：内部/modules/cjs/loader:1108:14）
在Object.Module._extensions..js（节点：internal/modules/cjs/loader:1137:10）
at Module.load（节点：内部/模块/cjs/加载器：973:32）
at功能模块加载（节点：内部/模块/cjs/加载程序：813:14）
at Module.require（节点：内部/模块/cjs/加载器：997:19）{
代码：“未找到模块”，
requireStack：[
'C:\\Users\\user\\Desktop\\project\\node\u modules\\qs\\lib\\stringify.js'，
'C:\\Users\\user\\Desktop\\project\\node\u modules\\qs\\lib\\index.js'，
'C:\\Users\\user\\Desktop\\project\\node\u modules\\express\\lib\\middleware\\query.js'，
'C:\\Users\\user\\Desktop\\project\\node\u modules\\express\\lib\\application.js'，
'C:\\Users\\user\\Desktop\\project\\node\u modules\\express\\lib\\express.js'，
'C:\\Users\\user\\Desktop\\project\\node\u modules\\express\\index.js'，
'C:\\Users\\user\\Desktop\\project\\server.js'
]
}

首先尝试删除全局安装的express

然后使用

npminit

初始化

package.json

文件。在这里，您将有一个依赖项、脚本、包名和一些其他数据的列表

然后使用

npm i express

安装express

安装后，请尝试使用

node server.js

或

npm start

运行它，如果您已经编写了在

package.json中运行
start
命令的脚本，我得到了答案

下载UTIL

这就是错误所在

C:\Users\user\Desktop\project>
节点服务器

node:internal/modules/cjs/loader:928
  throw err;
  ^

Error: Cannot find module './utils'
Require stack:
- C:\Users\user\Desktop\project\node_modules\qs\lib\stringify.js
- C:\Users\user\Desktop\project\node_modules\qs\lib\index.js
- C:\Users\user\Desktop\project\node_modules\express\lib\middleware\query.js
- C:\Users\user\Desktop\project\node_modules\express\lib\application.js
- C:\Users\user\Desktop\project\node_modules\express\lib\express.js
- C:\Users\user\Desktop\project\node_modules\express\index.js
- C:\Users\user\Desktop\project\server.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:925:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (C:\Users\user\Desktop\project\node_modules\qs\lib\stringify.js:3:13)
    at Module._compile (node:internal/modules/cjs/loader:1108:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
    at Module.load (node:internal/modules/cjs/loader:973:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Module.require (node:internal/modules/cjs/loader:997:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\user\\Desktop\\project\\node_modules\\qs\\lib\\stringify.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\qs\\lib\\index.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\middleware\\query.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\application.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\lib\\express.js',
    'C:\\Users\\user\\Desktop\\project\\node_modules\\express\\index.js',
    'C:\\Users\\user\\Desktop\\project\\server.js'
  ]
}

node:internal/modules/cjs/loader:928
  throw err;
  ^

Error: Cannot find module 'utils'
Require stack:
- C:\Users\user\Desktop\project\server.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:925:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (C:\Users\user\Desktop\project\server.js:3:15)
    at Module._compile (node:internal/modules/cjs/loader:1108:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
    at Module.load (node:internal/modules/cjs/loader:973:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ 'C:\\Users\\user\\Desktop\\project\\server.js' ]
}

C:\Users\user\Desktop\project>
您是否在全球范围内安装了express<代码>npm i-g express

？还是本地

npm i express

？@SomShekharMukherjee globally我猜这就是导致问题的原因，但不确定。如果您在全球范围内安装express有充分的理由，express应该在本地安装。尝试在本地安装它。@SomShekharMukherjee尝试过它不工作，这可能会对您有所帮助。不行，我试过了