Error cannot find module clone

I am using Windows 8.1 and Gulp 3.9.0, and I have just updated to io.js 2.3.0. When trying to run gulp in my project after the update, I receive the following message:

Cannot find module ‘clone’

Inside the following path:

C:UsersAppDataRoamingnpmnode_modulesgulpnode_modulesgulp-utilnode_modulesvinylindex.js:2:13

The full log is this:

Error: Cannot find module 'clone'
    at Function.Module._resolveFilename (module.js:332:15)
    at Function.Module._load (module.js:282:25)
    at Module.require (module.js:361:17)
    at require (module.js:380:17)
    at Object.<anonymous> (C:Users<username>AppDataRoamingnpmnode_modulesgulpnode_modulesgulp-utilnode_modulesvinylindex.js:2:13)
    at Module._compile (module.js:426:26)
    at Object.Module._extensions..js (module.js:444:10)
    at Module.load (module.js:351:32)
    at Function.Module._load (module.js:306:12)
    at Module.require (module.js:361:17)

I’m not sure what to do. Could you please help me?

Thanks

I’m working on app using node and postgresql. Recently I updated nodemon and started getting an error when I start my nodemon server: Cannot find module ‘./clone.js’. Here is the code of the error:

Error: Cannot find module './clone.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:580:15)
    at Function.Module._load (internal/modules/cjs/loader.js:506:25)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/nodemon/node_modules/graceful-fs/graceful-fs.js:4:13)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)

I checked that on Github and it said that this is recent bug and it was supposed to be fixed with next update. I waited until the update but still had the same error. I reinstalled nodemon, removed node_modules and did npm install. Somebody in Github issue page was suggesting to put clone.js in files array which is fine already. graceful-fs.js starts with code:

var fs = require('fs')
var polyfills = require('./polyfills.js')
var legacy = require('./legacy-streams.js')
var clone = require('./clone.js')

In the same folder there is already file clone.js with content, so now I’m really confused. Please help

When you are working in Node, you will sometimes encounter the error Cannot find module 'module-name' with the error code MODULE_NOT_FOUND.

The error looks like this:

	internal/modules/cjs/loader.js:796
    throw err;
    ^

Error: Cannot find module 'module'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Function.Module.runMain (internal/modules/cjs/loader.js:1043:10)
    at internal/main/run_main_module.js:17:11 {
        code: 'MODULE_NOT_FOUND',
        requireStack: []
    }

In this post, we’ll learn how to resolve this error.

What is the problem?

The issue is that Node is unable to find the module that you are trying to import into your Node application.

The most common reason for this is that you simply haven’t installed the project’s dependencies yet.

The project’s dependencies are listed in the package.json file at the root of the project.

The Solution

To fix the Cannot find module error, simply install the missing modules using npm.

To so, you can use the following command:

	npm install

If you are using the yarn package manager, you can use the following command:

	yarn install

This will install the project’s dependencies into your project so that you can use them.

Sometimes, this might still not resolve it for you. In this case, you’ll want to just delete your node_modules folder and lock file (package-lock.json or yarn.lock) and try again.

This is how you can delete the node_modules folder and lock files:

	rm -rf node_modules

rm package-lock.json
rm yarn.lock

Local files

If your module is not coming from a remote source, you are seeing the error because the path to the local file is not correct.

Try to confirm that the path pointing to the local module is correct and your error should be resolved.

Conclusion

The Cannot find module error is a common error that usually happens when dependencies are not installed. Once you install your dependencies and ensure that the paths are correct, you can resolve the error and run your application successfully.

Hopefully, this resolved the issue for you.

Thanks for reading!

• Support Us

• Join

• Share

• Tweet

• Share

Я работаю над приложением, используя node и postgresql. Недавно я обновил nodemon и начал получать сообщение об ошибке при запуске моего сервера nodemon: не удается найти модуль ‘./clone.js’. Вот код ошибки:

Error: Cannot find module './clone.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:580:15)
    at Function.Module._load (internal/modules/cjs/loader.js:506:25)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/nodemon/node_modules/graceful-fs/graceful-fs.js:4:13)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)

Я проверил это на Github, и он сказал, что это недавняя ошибка, и ее предполагалось исправить в следующем обновлении. Я дождался обновления, но все равно была та же ошибка. Я переустановил nodemon, удалил node_modules и сделал npm install. Кто-то на странице проблемы Github предлагал поместить clone.js в массив файлов, что уже нормально. graceful-fs.js начинается с кода:

var fs = require('fs')
var polyfills = require('./polyfills.js')
var legacy = require('./legacy-streams.js')
var clone = require('./clone.js')

В этой же папке уже есть файл clone.js с контентом, так что теперь я очень запутался. Пожалуйста помоги

✋ Update: This post was originally published on my blog decodingweb.dev, where you can read the latest version for a 💯 user experience. ~reza

“Error: cannot find module” occurs when you try to load a non-existant module in Node – Either via ESM (ECMAScript Modules) or CommonJS module systems.

The error usually looks like this in the console:

node:internal/modules/cjs/loader:936
  throw err;
  ^

Error: Cannot find module '/var/www/scripts/app.js'

Why does «Error: cannot find module» occur?

The error «cannot find module» might happen if you’re trying to:

• Import a third-party package you haven’t installed yet (with npm or yarn).
• Import a local module, but the path is wrong.
• Run a node script in the terminal, but the script doesn’t exist (or path is wrong).
• Use node standard libraries with TypeScript, but you haven’t installed the @types/node package.
• The module’s package.json has a main field pointing to an entry file that doesn’t exist.

Before anything, let’s review what a module is and how module systems work in a high level (Or jump to the solutions).

The module system: Modules are the building blocks of an application. Node implements ESM and CommonJS (the default one) module systems to let you organize your code as reusable components.

With modules, you can only expose the public interface of your components and keep the internal functionalities private. This is done by using a module.exports (CommonJS modules) or export (ES Modules).

The following code is an example of a module, which has a function to determine whether a number is odd or not:

// math.js

function isOdd(number) {
return number % 2 !== 0
}

// Make isOdd available to other scripts (and other modules)
module.exports = isOdd

And here’s how we import it into another script called index.js:

// index.js 
const add = require('./isodd.js') 

console.log(isOdd(3)) 
// output: true

All the modules you use have an ESM or CommonJS export declaration.

How do module systems find modules?

If the identifier passed to require() or import() is a reference to a file (it starts with /, ../, ./, etc.) in your filesystem, Node will load it from the respective path. Otherwise, it looks it up in the installed modules — inside the node_modules directory.

If the module isn’t found, it raises the «Cannot find module» error.

How to fix the «Cannot find module» error in Node.js?

There are several scenarios this error can happen; Let’s explore each.

Third-party packages: If you try to import a third-party module and get this error (and you’re sure the spelling is correct), you probably haven’t installed the package yet.

Imagine this is the code:

//index.js

const axios = require('axios');

// Make an HTTP request with Axios

If I run this on my machine, I’ll get the «Cannot find module» error.

And that’s because I haven’t installed it yet. So in my project directory (where my package.json resides), I’d have to install axios package with npm or yarn like so:

npm install axios

Local modules: Imagine you have a set of utility functions kept in a JavaScript file named utils.js. You want to import a function called getUrl() from this utils.js into your script:

// index.js

const { getUrl } = require('utils')

// Do something here ...

But when you run npm run build, the build fails:

ERROR in ./app/index.js 30:0-30
Module not found: Error: Can't resolve 'utils' in '/var/www/app'

In this case, since utils isn’t a reference to a local file, my bundler (Webpack) assumes it’s inside a node_modules directory. The build fails as the utils module isn’t an installed package.

So what I need to do here is to make it an absolute path by adding ./ to my identifier:

// index.js

const { getUrl } = require('./utils.js')

// Do something here ...

Problem solved.

Sometimes the error occurs because the letter casing is off. File names on Mac and Windows are case-insensitive by default; This means ./Utils and ./utils both work on Mac and Windows (where you develop the app). However, it’ll break on a Linux file system where filenames are case-sensitive.

Running a node script: Another scenario reported by developers is when you run a script with the node command. However, the respective file can’t be located — probably owing to a typo in the name or path.

So always double-check that the path is correct and the script exists. You can always take advantage of the terminal’s autocomplete feature by typing the initial letters and pressing the tab to let it complete the path for you.

node ./scriptName.js

Node and TypeScript: If you’re coding in TypeScript and you’re importing a built-in Node module like fs, you might get a «Cannot find module ‘fs'» error too.

You can fix the issue by installing @types/node:

npm install @types/node --save-dev

Even though all packages in node_modules/@types (of any enclosing folder) are included in your compilation. However, it’s worth ensuring node is added under compileOptions.types:

tsconfig.json

{
  compilerOptions: {
    types: [node, jest, express]
  }
}

Missing entry file in package.json: Each module has an entry file named index.js(by default) unless it’s changed in the module’s package.json via the main field.

{
  name: utils
}

If you decide to change the main field to another entry file (e.g., main.js), you must ensure the file exists. Or if you rename or relocate that file in the future, remember to update the package.json too.

Missing entry file in package.json has been reported by several users on Stackoverflow.

Importing a module from the global node_modules or a separate directory: Sometimes you might have to use a globally-installed package in your development environment.

If you try to load a globally-installed module in your project, you might get the «Cannot find module» error.

A workaround to this problem is using the npm link command. If the package is installed globally, all you need to do is run the following command while in your project directory:

npm link package-name

As a result, npm will create a symbolic link from the globally installed package name to the node_modules directory of your project — as if you’ve installed it with npm install package-name.

If the module you want to use is a local file residing somewhere in your file system other than the global node_modules (e.g., a module you’re developing), you’ll have to do it in a two-step process:

First step: In the terminal, you need to change the directory to where the module resides and run the npm link (without any parameter). As a result, a symlink is created in the global node_modules that links to your local package.

npm link

Second step: After that, you change the directory to your project directory (where you want to import the module) and run the following command:

npm link package-name

This will create a symbolic link from the globally installed package name to the node_modules directory of your project.

Now, you can use the package as if it’s an installed third-party package.

What if the problem persists?

If none of the above solutions worked for you, maybe you’re dealing with corrupted or incomplete installations. In that case, you can take the following steps:

Delete node_module directory:

rm -rf node_modules

Delete package-lock.json:

rm -f package-lock.json

Clear the npm cache:

npm cache clean --force

Install the packages again:

npm install

This will make a clean install of all the dependencies listed in your package.json file.

I hope these solutions help you fix your code.

Thanks for reading.

❤️ You might like:

• TypeError: map is not a function in JavaScript in JavaScript (Fixed)
• Add commas to numbers in JavaScript (Explained with examples)
• SyntaxError: Unexpected end of JSON input in JavaScript (Fixed)
• How to fix «ReferenceError: document is not defined» in JavaScript
• Label htmlFor Property Explained

Introduction

If you are trying to run your Node.js application and you get something
like this:

Error: Cannot find module 'C:UsersMemy_app.js'

then you are most likely trying to run the wrong file. It is possible
you are missing a dependency that is needed from npm install,
but if it says it cannot
find the main file you are trying to run, then you are
trying to run a file that does not exist. It is a common mistake.

How to fix «Error: Cannot find module»

You need to double check you are running the correct file from the
correct directory. Here are some steps to diagnose.

General tips

Here are some general things to keep in mind when diagnosing the issue:

• Make sure you are in the correct directory.
• Make sure you are trying to run the correct file name.
• File and directory names are case sensitive.

How to change directories

To change directories, use the cd command in your terminal.
For example, if your username was Me on the computer:

# In Windows
cd C:UsersMemy_project_directory

# In Mac OS
cd /Users/Me/my_project_directory/

# In Linux
cd /home/Me/my_project_directory/

How to see what directory you are in

To check what directory you are currently in, use the folowing in your terminal.

# In Linux/Mac
pwd

# In Windows
echo %cd%

How to print the contents of current directory

To see what files and directories exist in your current directory
use the following in your terminal:

# In Windows
dir

# In Linux/Mac
ls

Conclusion

After reading this you should have some idea why you get
the error Error: Cannot find module and how to diagnose and
fix the problem.