未找到模块：错误无法解析“child_process”，如何解决？
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【中文标题】未找到模块：错误无法解析“child_process”，如何解决？【英文标题】：Module not found: Error can't resolve 'child_process', how to fix? 【发布时间】：2019-06-24 20:19:22 【问题描述】：我正在尝试创建一个 JupyterLab 扩展，它使用打字稿。
我已经成功添加了包“@types/node”，允许我使用诸如'require('http')'之类的包。
但是，一旦我尝试使用子进程，使用 'require("child_process")' 我在尝试构建扩展时会收到以下错误。
ModuleNotFoundError: Module not found: Error: Can't resolve 'child_process' in '/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/lib'
at factory.create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/webpack/lib/Compilation.js:535:10)
at factory (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/webpack/lib/NormalModuleFactory.js:397:22)
at resolver (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/webpack/lib/NormalModuleFactory.js:130:21)
at asyncLib.parallel (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/webpack/lib/NormalModuleFactory.js:224:22)
at /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/neo-async/async.js:2825:7
at /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/neo-async/async.js:6886:13
at normalResolver.resolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/webpack/lib/NormalModuleFactory.js:214:25)
at doResolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:184:12)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at resolver.doResolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:37:5)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:12:1)
at resolver.doResolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/DescriptionFilePlugin.js:42:38)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn41 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:381:1)
at resolver.doResolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/ModuleKindPlugin.js:23:37)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at args (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/forEachBail.js:30:14)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at resolver.doResolve (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:37:5)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5)
at _fn0 (eval at create (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/tapable/lib/HookCodeFactory.js:32:10), <anonymous>:15:1)
at hook.callAsync (/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/enhanced-resolve/lib/Resolver.js:238:5) resolve 'child_process' in '/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/lib' Parsed request is a module using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/package.json (relative path: ./lib)
Field 'browser' doesn't contain a valid alias configuration
resolve as module
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/lib/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/jupyterlab-ext/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/envs/node_modules doesn't exist or is not a directory
/home/fionn/anaconda3/node_modules doesn't exist or is not a directory
/home/fionn/node_modules doesn't exist or is not a directory
/home/node_modules doesn't exist or is not a directory
/node_modules doesn't exist or is not a directory
looking for modules in /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/package.json (relative path: ./node_modules)
Field 'browser' doesn't contain a valid alias configuration
looking for modules in /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/package.json (relative path: ./node_modules)
Field 'browser' doesn't contain a valid alias configuration
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/package.json (relative path: .)
no extension
Field 'browser' doesn't contain a valid alias configuration
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/package.json (relative path: ./node_modules/child_process)
no extension
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process is not a file
.wasm
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process doesn't exist
.wasm
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process.wasm doesn't exist
.mjs
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process.wasm doesn't exist
.mjs
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process.mjs doesn't exist
.js
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process.mjs doesn't exist
.js
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process.js doesn't exist
.json
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process.js doesn't exist
.json
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process.json doesn't exist
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process.json doesn't exist
as directory
existing directory
use ./index.js from main in package.json
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/package.json (relative path: .)
Field 'browser' doesn't contain a valid alias configuration
as directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/jupyerlab_xkdc/node_modules/child_process doesn't exist
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/package.json (relative path: ./index.js)
no extension
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js doesn't exist
.wasm
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js.wasm doesn't exist
.mjs
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js.mjs doesn't exist
.js
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js.js doesn't exist
.json
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js.json doesn't exist
as directory
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js doesn't exist
using path: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index
using description file: /home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/package.json (relative path: ./index)
no extension
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index doesn't exist
.wasm
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.wasm doesn't exist
.mjs
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.mjs doesn't exist
.js
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.js doesn't exist
.json
Field 'browser' doesn't contain a valid alias configuration
/home/fionn/anaconda3/envs/jupyterlab-ext/share/jupyter/lab/staging/node_modules/child_process/index.json doesn't exist error Command failed with exit code 1.
我已经用谷歌搜索了，但仍然不知道如何解决这个问题。
任何指针或信息都将不胜感激。
我的 packages.json 文件。
"name": "jupyerlab_xkdc",
"version": "0.1.0",
"description": "Short description",
"keywords": [
"jupyter",
"jupyterlab",
"jupyterlab-extension"
],
"homepage": "https://github.com/my_name/myextension",
"bugs":
"url": "https://github.com/my_name/myextension/issues"
,
"license": "BSD-3-Clause",
"author": "Fionn McKnight",
"files": [
"lib/**/*.d.ts,eot,gif,html,jpg,js,js.map,json,png,svg,woff2,ttf",
"style/**/*.css,eot,gif,html,jpg,json,png,svg,woff2,ttf"
],
"main": "lib/index.js",
"types": "lib/index.d.ts",
"repository":
"type": "git",
"url": "https://github.com/my_name/myextension.git"
,
"scripts":
"build": "tsc",
"clean": "rimraf lib",
"prepare": "npm run clean && npm run build",
"watch": "tsc -w"
,
"dependencies":
"@jupyterlab/application": "^0.19.1",
"@jupyterlab/apputils": "^0.19.1",
"@phosphor/coreutils": "^1.3.0",
"@phosphor/messaging": "^1.2.2",
"@phosphor/widgets": "^1.6.0",
"@types/jquery": "^3.3.29",
"@types/node": "^10.12.19",
"child_process": "^1.0.2",
"npm": "^6.7.0"
,
"devDependencies":
"@types/node": "^10.12.19",
"rimraf": "^2.6.1",
"typescript": "~3.1.1"
,
"jupyterlab":
"extension": true
【问题讨论】：
这甚至是全栈错误吗？ 你能告诉我们你的 package.json 吗？ 是的，当我转到文件夹 'child_process' 时，它是空的，除了一个自述文件指出“此包当前未使用，但以前被另一个包占用”。 添加了我的 packages.json 我想知道***.com/a/59381357/470749是否相关。 【参考方案1】：只需放入 package.json
"browser":
"child_process": false
你在使用 webpack
【讨论】：
我添加了，不再出现错误，谢谢。抱歉，我对这一切都很陌生，我不确定我是否使用 webpack，我怎么知道？另外，你能解释一下为什么我需要将它添加到我的 package.json 中吗？谢谢！ 将 browser: child_process: false 添加到 package.json 意味着：告诉 webpack 模块可以为这个 modules.weback 隐式获取一个空对象由 node_modules 使用..您也可以显式使用它。如果您显式使用，则必须在 webpack.config.js 文件中定义它配置 好的，但我不希望它是一个空对象，我有'const spawn = require("child_process").spawn'，现在返回未定义。 使用 node.js 内部子进程模块。这可能会有所帮助或尝试同步版本的 spawn 这可能会有所帮助 [nodejs.org/api/child_process.html] 同样的问题 [***.com/questions/44305603/…]【参考方案2】：我在尝试运行使用 webpack 的 storybook.js 时遇到了类似的错误。
对于 Webpack
您可以将以下内容添加到 webpack 的配置中以修复构建 -
// webpack.config.js
...,
node:
child_process: "empty"
// fs: "empty", // if unable to resolve "fs"
,
您也可以将其他冲突模块设置为"empty"，如果它们负责破坏构建。
Reference for Webpack's config.node
【讨论】：
【参考方案3】：在我使用的较新版本中：
// webpack.config.js
...,
resolve:
extensions: [".ts", ".js"],
fallback:
"child_process": false,
// and also other packages that are not found
,
【讨论】：
【参考方案4】：在使用 next.js 时随机遇到这个问题 我通过清除解决了它，
.next
node_modules
文件夹 猜猜它可能适用于在下一个 js 中遇到此客户端进程错误的人
【讨论】：
遇到了同样的问题...你是如何清除它们的？重新创建应用程序？ 我刚刚清除了答案中提到的文件夹。当我执行 npm i 和 npm run 时，它没有任何问题。 感谢您的反馈。我的问题是 firebase 的导入不正确。我从其他地方复制/粘贴了导入语句，这导致了同样的错误。也许它可以帮助某人。 :)【参考方案5】：在页面中导入path 和fs 后，我在next.js 中得到了这个。
通过将它们放在getStaticProps() 函数中来解决它。
【讨论】：
【参考方案6】：同样的事情发生
找出原因
错误地将导入添加到创建问题的文件中
import debug from "webpack";
【讨论】：
【参考方案7】：我在这件事上被屏蔽了几次。
据我了解，从浏览器执行一些 child_process （实际上是在执行一些 cmd ）似乎是不可能的，这在某些时候也是有意义的。
给出的解决方案对我有用，在下面添加到package.json 正在工作
"browser": "fs": false, "child_process": false
但是不要将它添加到您的 package.json 中（意味着您的应用程序之一），而是将 package.json 从库中添加到您正在使用的位置
require('child_process') 是。
这已经完成了，这个修复只是对编译器说即使你的代码或依赖项的某处需要这个库（而不是崩溃）也可以没有库。如果你想在你的 App 中使用 child_process 恐怕会很复杂。
这是我帖子的source
【讨论】：
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