We Keep Coding

cant install react-navigation using npm [duplicate]

When trying to install the npm packages using npm i command, I am getting the following exception:
I have tried reinstalling the Node.js package and setting the proxy to off using:
set HTTP_PROXY=
set HTTPS_PROXY=
The issue is still there. What I am doing wrong?
Update:
When I run the following command:
npm install --legacy-peer-deps
The following error is displayed:

This is not related to an HTTP proxy.
You have dependency conflict (incorrect and potentially broken dependency) as it says, so try to run the command with --force, or --legacy-peer-deps. If it doesn't take effect, the temporary solution is using prior versions of the Node.js (downgrading the Node.js version) as it causes this kind of errors to happen sometimes.
Update based on the OP's update:
As you see, it fires the following error:
No matching version found for #angular/http#^9.1.4.
Take a look at angular/http page. Note that the latest version for that deprecated package is 7.2.16 while you request an upper version (e.g., ^9.1.4)! So, try to check the project dependencies and follow the raised errors in order to solve the problem.

Try this command-
npm install --save --legacy-peer-deps

First to understand the problem. Here is what I have as error:
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: project-admin#11.0.0
npm ERR! Found: #angular/common#11.0.3
npm ERR! node_modules/#angular/common
npm ERR! #angular/common#"11.0.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer #angular/common#"^9.1.0 || ^10.0.0" from #agm/core#3.0.0-beta.0
npm ERR! node_modules/#agm/core
npm ERR! #agm/core#"3.0.0-beta.0" from the root project
First you should start to read the problem from the bottom to the top. Here #agm/core#3.0.0-beta.0 requires angular common 9.1.0 or 10.0.0. And the top message says that the angular common found is actually 11.0.3.
(If you want to understand dependencies little bit better, here is very simple site: How npm3 Works)
dependencies — these are the essential dependencies that you rely on and call in your project’s code
devDependencies — these are your development dependencies, for example, a prettier library for formatting code
peerDependencies — if you set a peer dependency in your package.json, you are telling the person who installs your package that they need that dependency with the specified version
optionalDependencies — these dependencies are optional and failing to install them will not break the installation process
bundledDependencies — it’s an array of packages that will come bundled with your package. This is useful when some 3rd party library is not on NPM, or you want to include some of your projects as modules
So what should be the solution then? The problem is about peer dependencies. The solution is to downgrade angular common or the solution is to use legacy dependencies logic for installing packages using --legacy-peer-deps. So --legacy-peer-deps does not try to install the peerDependencies automatically. Is this going to work for you? Probably, yes. But you should add specific instructions how to do that, or to make the use of --legacy-peer-deps automatic for future installation of the project packages with this code from one of the previous answers:
npm config set legacy-peer-deps true
In my case I installed the package and I tried to run ng serve, but because --legacy-peer-deps was used, there were dependency packages which were not installed. I had to install those manually (because I did not set the configuration from the code above). At the end installing about five packages manually, all with --legacy-peer-deps, I ended to a package that could not be installed and I did not try to continue, because my project was throwing warnings like crazy and there were a lot of packages for audit too. So my decision was not to use this package and to find an alternative.
Other solutions that I read about along the way:
downgrade Node.js to v14. This will downgrade npm. It might not be v14, but this was the version that was most widely downgraded to.
Some people use Yarn to force package installation - personally I don't understand how this works, because I haven't used Yarn.
downgrading Angular and the global Angular CLI version to version that will satisfy the requirement. In my case it is angular/common, and in the question it's angular/core, but both require downgrading the whole angular right (I am not sure about this here).
the package you install might have a higher version that doesn't require downgrading Angular. You might try to use the https://updatepackagejson.com/ to upgrade your packages to the latest, but this is in case your project is quite new.

In addition to using the --legacy-peer-deps command line option, this can also be set more permanently as a config option:
npm config set legacy-peer-deps true

Finally, I found the answer. Try this command -
npm install --save --legacy-peer-deps
Described here legacy-peer-deps

When using npm 7, this comes up a lot because peer dependencies issues are treated as errors in version 7 whereas they were generally only warnings in version 6. Usually using --legacy-peer-deps makes it work with npm 7.
When that doesn't work, an option is to downgrade to npm 6. Downgrading Node.js is not necessary (but not harmful either). The relevant dependency management code is in npm. Downgrading Node.js will often work coincidentally because doing so will often downgrade npm as well.
Another option that is less disruptive than downgrading npm is using npx to use the previous version of npm for just the install command: npx -p npm#6 npm install
And when all else fails, it's often worth a shot to remove the node_modules directory and package-lock.json, and then run npm install again. That regenerates node_modules and package-lock.json.

This happens for some packages after updating to npm 7.
Parameter --legacy-peer-deps can help:
npm i --legacy-peer-deps
Described here legacy-peer-deps
Causes npm to completely ignore peerDependencies when building a
package tree, as in npm versions 3 through 6.
If a package cannot be installed because of overly strict
peerDependencies that collide, it provides a way to move forward
resolving the situation.
...
You can set this option to true by default (not recommended by npm):
npm config set legacy-peer-deps true
Or just wait until these packages get up to date.

Just do two simple steps:
First, execute this in your terminal.
npm config set legacy-peer-deps true
Second, clear the cache:
npm cache clean --force
And finally, execute your command. This will work for sure.

The problem is related to a dependency conflict or broken dependency. You can proceed by accepting the incorrection of dependency by forcing an install.
Solution: Using command with --force.
Your command will be like npm install --force #your-npm-package.
Note: You can use yarn to install a dependency if it's available in to install with the yarn package manager.

NPM can be used to install and manage versions of dependencies in your projects.
I had it the same issue on React versions in relation with the npm version:
npm error found types/react#16.14.20
So it might be package-versions that need to be installed based on your package.json file.
It gives errors in the npm 7 version and cannot install Node.js modules.
If you will downgrade npm version to 6, those problems will become warnings and the problem will be resolved.
Try to prove this command: npm install -g npm#6
Check if version is already installed: npm --version
Remove and install node_modules package:
a) Remove rm -rf node_modules
b) Install: npm i

Try removing the node modules and package-lock.json file and run command npm install
or
Try npm cache clean --force

First I tried
npm install
It gave me error unable to resolve dependency tree and based on the help information from this command,
Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
I tried this command:
npm install --legacy-peer-deps
And it solved my problem.

Try two options to resolve this issue:
Option 1: Delete folder node_modules folder and file package_lock.json after running:
npm cache clean --force after npm i --force
Option 2: run npm install --save --legacy-peer-deps

The fastest solution: npm install --legacy-peer-deps
Explanation:
In npm versions 3 through 6, peerDependencies were not automatically installed, and would raise a warning if an invalid version of the peer dependency was found in the tree. As of npm v7, peerDependencies are installed by default.
npm docs: peerDependencies
Your dependency contains some peerDependencies that conflict with the root project's dependency.
As it described in the npm ERR log.

Disclaimer: This assumes you're on npm v7
Note: If you follow the instructions of sibling commenters, it will create a user-scoped config that won't sync consistently across teammates / machines / buildbots.
Project-based legacy peer dependencies
You will probably want legacy-peer-deps tied to your project so it proliferates across machines / developers, and doesn't contaminate your other projects.
npm config set legacy-peer-deps true --location project
This will create a local file at .npmrc which you can commit to your repository:
legacy-peer-deps=true
Then afterwards, you can just run:
npm install
Then commit the updated lockfile.
Remember, location, location, location:
per-project configuration (/path/to/my/project/.npmrc, see more):
npm config set legacy-peer-deps true --location project
per-user configuration (defaults to $HOME/.npmrc, see more)
npm config set legacy-peer-deps true --location user
or, as the default location is user anyway:
npm config set legacy-peer-deps true
global configuration (defalts to $PREFIX/etc/npmrc, see more)
npm config set legacy-peer-deps true --location global
or, as --global infers --location global
npm config set legacy-peer-deps true --global
For some projects, fixing dependencies may be non-trivial
In my case, a critical dependency we have a legacy version of wants to pull in webpack v3 (!) - but that's a build dependency of that project's.
The best solution on a short term basis is to use legacy-peer-deps as a hold over.
If you are in a pinch, you could also consider forking the dependency and adjusting its peer dependencies accordingly - them point your project to the fork.

You can install the packages using two ways it is showing this error
ERESOLVE unable to resolve dependency tree
Install the package using npm install and having --legacy-peer-deps
npm install --save --legacy-peer-deps
This is a combination of two commands
a. Set legacy-peer-deps true in npm config
npm config set legacy-peer-deps true
b. Now install packages using npm install
npm install

The problem seems to be that gf-kautomata-pipeline-ui is using Angular 9, while #angular/http requires Angular 7. (#angular/http was deprecated and eventually removed, and all its functionality was moved into #angular/common instead.)
See: https://www.npmjs.com/package/#angular/http
If you're running Angular 9, then
delete #angular/http from your package.json (You don't need it in Angular 9)
Make sure you have #angular/common in your package.json.
Run npm i.
If you're running Angular 7, then open up your package.json and check to make sure all of your Angular packages are no higher than ^7.0.0. You may also need remove gf-kautomata-pipeline-ui, or contact the author of gf-kautomata-pipeline-ui and find out if the library is compatible with Angular 7.

This works for me:
npm install --save --legacy-peer-deps

In my case, I started getting the error (below) after upgrading npm from version 6 to 7.
npm ERR! code ERESOLVE npm ERR! ERESOLVE unable to resolve dependency
tree
...
npm ERR! Fix the upstream dependency conflict, or retry this command with --force, or --legacy-peer-deps to accept an incorrect (and potentially broken) dependency resolution.
In my case compiling with either --legacy-peer-deps or --force flags resulted in a useless bundle.
So I tried deleting the node_modules, package-lock.json, and bundle using yarn install. This generated a yarn.lock file and created package-lock.json that worked fine in subsequent npm runs.
P.S.: I am using the temporary workaround until npm 7 works fine with my project: after that, I will delete yarn.lock, package-lock.json and folder node_modules, and recompile with npm
rm -rf node_modules
rm package-lock.json
yarn install
# Generates a yarn.lock file and a new package-lock.json
# Continue with npm
npm start

I just update my Node.js and it works for me:
node -v
Output:
V xxxx
And:
sudo npm install -g n
(Use this command to install the stable node release.)
sudo n stable

If you have node_modules folder and package-lock.json file in your root directory then remove those:
rm -r node_modules
rm package-lock.json
Then run commands:
npm install --save --legacy-peer-deps
npm audit fix --force
Create .env file in the root directory and paste below code:
SKIP_PREFLIGHT_CHECK=true
Now, start your project:
npm start

I have faced this issue many times. At last I found a solution:
npm install react-native-paper --legacy-peer-deps

Use
npm install --legacy-peer-deps
This worked for me.

For this case, I was having the issue
ERESOLVE unable to resolve dependency tree
in an Angular 13 project that used some packages from a private npm feed in Azure DevOps.
To access this repository, I created an .npmrc file. Because of this, the npm install command would search all packages in my private repository and not in npm feed any more. The unable to resolve the dependency tree error happened because the npm install command could not find many of the packages that were hosted in the npm feed and not my private feed.
I found this amazing answer on how to scope packages.
Based on this, I made some changes:
In my library Package.json, update the name to have a scope name #mylib
"name": "#myLib/command-queue",
Build and publish this package to my private feed
In my client app (the one that uses this package), update the .npmrc file to use my private feed for packages in this scope only
#myLib:registry=https://pkgs.dev.azure.com/...
always-auth=true
Now, whenever I run the command npm install, if the package has the scope #myLib, it will look for it in my private feed, and use the npm feed for all other cases (i.e., #angular/...)
This is an example of my client app Package.json file:
"#angular/platform-browser-dynamic": "~13.3.0",
"#angular/router": "~13.3.0", <-- this comes from npm
"#myLib/jcg-command-queue": "^2.2.0", <-- This comes from my private feed
Also, with this change, there isn't any need to add --legacy-peer-deps to the npm install command any more.

We had the same issue resulting in the error bellow:
npm ERR! code ERESOLVE npm
ERR! ERESOLVE could not resolve npm
ERR!
npm ERR! While resolving: #angular/material-moment-adapter#12.1.4 npm
ERR! Found: #angular/material#12.0.6 npm ERR!
node_modules/#angular/material npm ERR! #angular/material#"~12.0.4"
from the root project
...
We use npm ci for clean install in Azure-Pipelines.
The issue was very often, that package.json and package-lock.json were not in sync anymore.
Solution to it was to execute npm install local and push the new package-lock.json.
As and additional hint we added a new task in the pipeline for additional informations if the the job fails.
- task: Npm#1
displayName: npm install
inputs:
command: custom
customCommand: ci
customRegistry: useNpmrc
# ##vso[task.logissue type=error] writes the text to the summary page (error-log).
- bash: echo "##vso[task.logissue type=error] If 'npm install' fails with 'ERESOLVE could not resolve', 'package.json' and 'package-lock.json' (needed for 'npm ci') may be out of sync. Run 'npm install' locally and push the new package-lock.json."
condition: failed() # Only execute on fail
displayName: npm install failed hint

Resetting package-lock.json works good for me all the time:
git checkout -- package-lock.json
Details:
Been experiencing this a lot when updating all packages of the legacy project - I highly don't recommend using npm audit fix nor npm i --force. Deleting the package-lock.json didn't work for me all the time as well. Rollback to the working version of package.json + package-lock.json and add packages turned out to be the safest and fastest variant for me.

Just in case, I did have similar behavior, when I tried either npm upgrade my current Angular 11.x based boilerplate from previous ng new or create new ng new abc based on Angular 12.x. I simply forgot to upgrade Angular CLI. So this npm install -g #angular/cli#latest solved my errors during ng new abc.

In my case I was having trouble with a #babel/core dependency, but I didn't want to use --force, because I was not sure about the consequences, so I went to https://www.npmjs.com/, looked for the package and replaced my old version with the newest one. That did the work.

This is an issue of Node.js version. Some latest versions of Node.js could show errors like these.
https://github.com/nvm-sh/nvm
I use NVM to manage Node.js versions on the system and use Node.js 12 to get past this error.
Command to change version:
nvm use 12

Downgrade Node.js to v14 works for me.
Use these commands:
source ~/.bash_profile
nvm use v14.16.1
npm install

What is difference between npm install and meteor npm install

I am working on Meteor and want to know that what is the difference between
npm install and meteor npm install.
Thanks

According to Meteor Development Group's comments in the official forum, the difference is as follows;
meteor npm calls the bundled npm version, so it doesn’t require npm to be installed globally, That is just a convenience however, so if you do have npm installed using that will work perfectly fine. That being said, it is a good practice to get into always using meteor npm, as that way you can make sure you’re using the same npm version that has been tested with your current version of Meteor.

When using meteor npm you can make sure that you are using the same npm version that has been tested with your current Meteor's version.
When using npm install it just uses the global npm on your machine. So i'd advise to use meteor npm

This may help you to understand difference between npm install and meteor npm install
The former is installing npm packages, which will be listed in packages.json and located in the node modules directory and need to be imported into your code.
The latter is using atmosphere packages which will be listed under .meteor/packages and will be included in your build (no need to import).

Install type definitions automatically when I install an npm package

Is there a way to configure npm in such a way so that whenever I install a package, it will:
Check if it has type definitions inside it
If it does not, try to install #types/PACKAGE with the --save-dev flag
Ideally, I'd like this to happen automatically (as a plugin or something) without writing a shell script that will limit the API. For example, I might write a shell script such as: (note that this doesn't really answer all the requirements)
#!/bin/bash
npm install --save $1 && npm install --save-dev #types/$1
But this limits me because maybe I want to --save-dev both of the packages or want to use some special flags in the command. Also, it creates a dependency on bash which I'd like to avoid.
Alternatively, if there is a way to make a shellscript that won't be limiting in that way, that would be okay too.
Also, the above example doesn't actually check if the package has type definitions already (in which case I don't want to download any from #types).

Here are some command line utilities that help with this
TypeSync
Install missing TypeScript typings for dependencies in your package.json
github - 988 ⭐
npm - 14k/wk
# installation
npm i -g typesync
# usage
npx typesync
Typed-Install
Easily install new packages and their types, every time.
github - 87 ⭐
npm - 1k/wk
# installation
npm i -g typed-install
# usage
typedi lodash
TS-Typie
A small utility for installing TypeScript definition files using npm
github - 25⭐
npm - 0.3k/wk
# installation
npm i -g ts-typie
# usage
npx ts-typie

I ended up writing a CLI utility that does exactly this. Thin layer on top of your package manager of choice.
Check it out at https://github.com/xavdid/typed-install

How do I fix missing #angular/Core modules?

I can not run the Angular 2 project.
What I tried:
- running the project by using npm install and npm start | does not work
- I cloned quickstart from the github and replaced with my src folder and I still get the "can not find module in #angular/core"
Here is the full console output: https://www.dropbox.com/s/5plmqrjd6ge0lta/error.txt?dl=0

Many people will come here. I have had the same problem. Do not panic. You are probaly following the tutorial of tutorialspoint.
Just install the core again using NPM
npm install #angular/core

There was/is a bug in certain versions of npm that causes installed modules to disappear when using npm install someModule ... or npm install someModule --save-dev
This was apparently an issue if the module being installed was from a GitHub repo and lacked a specific commit hash to reference for the installation. Although the issue was marked "closed" and the repo archived several months ago at v5.6.0, I ran into the problem today w/the latest npm 6.4.0
In my case, doing npm install rxjs completely removed the #angular/core module, along with my #ionic-native plugins, and anything else I'd installed individually (and then it failed to actually/properly install rxjs anyway!!)
Tip: copy your existing npm modules folder as a backup before starting updates or removing it entirely & trying to npm install.
You can manually install to your project via npm install #angular/core, but depending on the npm version (or the angle of the moon at that precise moment, who knows) be aware that you might wind up with other missing dependencies.
Also try npm install #angular/core && npm install ... Apparently the additional npm install helps replace the randomly deleted/missing modules in some cases.

What package version does #next specify for npm?

What version of package foo will this command install?
npm install foo#next
The package.json and semver docs don't mention next.

next is a version or tag published in your reference npm registry
npm install installs a package.
A package is:
...
d) a <name>#<version> that is published on the registry (see npm-registry) with (c)
e) a <name>#<tag> (see npm-dist-tag) that points to (d)
...
You can view the version that each dist-tag points to by running the following commands:
npm view <package_name> dist-tags
npm dist-tags ls <package_name>
e.g. for the react npm package:
npm view react dist-tags
Output:
{
latest: '17.0.2',
next: '18.0.0-rc.0-next-3dc41d8a2-20211223',
experimental: '0.0.0-experimental-3dc41d8a2-20211223',
beta: '18.0.0-beta-24dd07bd2-20211208',
rc: '18.0.0-rc.0'
}
Source

Next is tag. look at the below possible commands.
A tag can be used when installing packages as a reference to a version instead of using a specific version number:
npm install [<#scope>/]<name>
npm install [<#scope>/]<name>#<tag>
npm install [<#scope>/]<name>#<version>
npm install [<#scope>/]<name>#<version range>
How its added in package?
See dist-tag
npm dist-tag add <pkg>#<version> [<tag>]
npm dist-tag rm <pkg> <tag>
npm dist-tag ls [<pkg>]
Check - https://docs.npmjs.com/cli/dist-tag

Appending the #next tag to the package name installs the upcoming version, which is likely unstable.
From npm docs for npm-dist-tag:
Tags can be used to provide an alias instead of version numbers.
For example, a project might choose to have multiple streams of
development and use a different tag for each stream, e.g., stable,
beta, dev, canary.
By default, the latest tag is used by npm to identify the current
version of a package, and npm install (without any # or
# specifier) installs the latest tag. Typically, projects only
use the latest tag for stable release versions, and use other tags for
unstable versions such as prereleases.
The next tag is used by some projects to identify the upcoming
version.
Other than latest, no tag has any special significance to npm itself.