Installing packages via npm shows the following message and nothing is installed..
sakthiganesh#ubuntu:~$ npm install express
express#2.3.8 ./node_modules/express
├── mime#1.2.2 ()
├── connect#1.4.1 ()
└── qs#0.1.0
any solutions ?
Express are installed already in your case. By default npm installs modules in the node_modules subdirectory of the current dir. If you want to install module globally use commands with -g key:
sudo npm install -g express
But good practice are placing modules required for your application in the application directory. Go to directory, where your javascript file took place and run npm install without -g:
cd /var/www/my_app
npm install express
Related
I have a Node.js project which has several dependencies.
I created the package.json file (npm init)
and try to install all the relevant packages
(npm install all) or (npm install)
with npm install I'm getting the following result:
npm notice created a lockfile as package-lock.json. You should commit this file.
but
when I'm trying to run, I'm getting error that a package is missing (i.e express and I need to install it manually)
Is there a way (command) to install at once (with one command) all the relevant packages and dependencies ? (instead of install each of the package manually) ?
Update 1:
I think I found the solution to your problem, you can use this npm module for auto installing your dependencies.
Install
npm install -g auto-install
Usage
Run auto-install in the directory you are working in.
So npm is simple!
you can add a single package using npm install package-name
or
you can install all using npm install, this will read your package.json file and install all the packages which are in there
Additionally you can do this:
npm install package1 package2 package to install multiple packages.
If a required dependency is not installed, just install it once manually using npm's --save argument and it will automatically add that dependency to your package.json.
For instance, if you are missing the express dependency, just run:
npm install --save express
That will install the dependency in your node_modules folder and also automatically update your package.json file to include express. On subsequent installs on different machines, you'll now only need to run npm install and the express package will be added automatically.
Update with a little more context: In Node your package.json file defines all dependencies that are required for your project. However, these dependencies are not automatically generated for you. npm init will create a boilerplate package.json, but it will not fill that package.json with any dependencies.
You need to define the dependencies yourself, which you can do one of two ways:
Manually add lines to your package.json's dependencies section
Use npm install --save <package name> to have npm install a package and automatically save that package as a dependency in your package.json file
If you aren't familiar with package.json files, I'd recommend sticking to approach number 2 so that npm handles editing that file for you.
Once you have a package.json with all of the dependencies you need, then when you pull down your project onto new machines you will be able to automatically install all dependencies at once using a simple npm install command. You can test this on your own machine by deleting the node_modules folder and running npm install, then trying to run your project. If it runs fine then you successfully added all dependencies to your package.json. If it complains about a missing package then add that package with npm install --save <package>
On the Mac, after installing node with:
brew install node
The only package that showed up in /usr/local/lib/node_modules is npm. My previous installation of node contained a bunch of packages such "express, apn, http2, ws, etc."
Any ideas?
There was not a package.json either.
When you install node you only get npm, those other packages you mention, were installed using
# probably with sudo
npm install -g {package}
The package.json is created when you run:
npm init
It has nothing to do with node installation.
If you wish to start a new project:
mkdir project
cd project
npm init
npm install {package-name} {other-package}
And now you will have a node_modules folder inside project/ and a package.json with {package-name} & {other-package} as dependencies
When I use npm init in cmd, npm creates an etc directory and package.json.
Then when I use npm install stylus --save-dev,the module is downloaded in node_modules directory. But I can not find dependency in package.json
and I realize I can use command ls, mkdir in cmd, which is also confusing.
after npm init I cat package.json
This is my initial directory after I use npm init, I get etc\ directory, which should not be in this directory
This is the directory after I use npm install stylus --save-dev
After installing stylus, I cat package.json, but no dependency in this file
I cannot find out what is wrong.
I'm using Windows 10
node-version 8.9.1
npm version 5.5.1
npx installed
You could try:
npm install -D stylus
or
npm install stylus -D
For multiple packages, do this:
npm install pkg1 pkg2 pkg3 -S
or
npm install -S pkg1 pkg2 pkg3
The difference between -S and -D is -S adds the package(s) to dependencies while -D adds to dev-dependencies.
-S and -D are flags, regardless of where you put it, be it before the package names or after the package names, npm will recognise them and act accordingly.
Check out this command
npm install --save-dev stylus
When you write stylus then --save-dev it is identifying --save-dev as package not as command.
For multiple package to install we write
npm install package1 package2 package3
I was also having the same problem. I assume that you would have set "prefix" key for npm local configuration. Running:
npm config delete prefix
may help. Then start your project:
npm init or npm init -y
I'm using node/grunt for deploying to a shared hosting server.
I have node installed in $HOME/opt/node
I don't know where npm install -g grunt is going to install it to, or how to tell npm to install global files to $HOME/some/path.
I ran npm install grunt -g and it seemed to work, but I cannot find the grunt binary anywhere.
If you want the grunt command in your server's shell, you'll need to install the Grunt CLI.
npm install grunt-cli -g
Global modules are located here:
/usr/local/lib/node_modules
I was trying to install phantomjs in order to make test Twitter Bootstrap. After I had installed it locally i.e. npm install phantomjs, it reported that the package was extraneous.
├─┬ phantomjs#1.9.0-3 extraneous
│ ├── adm-zip#0.2.1
...
npm ERR! extraneous: phantomjs#1.9.0-3 /Users/admin/bootstrap/node_modules/phantomjs
npm ERR! not ok code 0
However, when phantomjs was installed globally i.e. npm install phantomjs -g, it worked fine i.e. no extraneous error reported.
Questions:
Is it because phantomjs not specified in the package.json file?
General question: Can we have any package e.g. phantomjs installed globally and also locally?
Yes. (Re-installing with npm install wont install phantom.js again.) (Btw.: npm install xxx --save will automatically add xxx to the package.json)
Yes. Local package versions are preferred over global ones. (Although you need some path handling for executables.)
phantomjs should be included in your local .json package(manually editing it or using --save command see TheHippo's answer). If it is installed somewhere and you don't need it use the prune command
npm prune
will remove all non-required packages.
To install an item both locally and globally use:
sudo npm install -g phantomjs