When you have a node project with a package.json file, you can run npm install from the project root and npm will install all the dependencies listed in the package.json. In this case, running coffee will now allow you to use the coffee-script REPL.Īnother important use for npm is dependency management. This will then allow you to run the program from the console just like any other CLI tool. This will typically install the program and put a symlink to it in /usr/local/bin/. The npm command is simple: npm install coffee-script -g. Let’s look at an example of a global install – let’s say coffee-script. Once installed to your node_modules folder, you’ll be able to use require() on them just like they were built-ins. Thankfully, npm is very simple to use: you only have to run npm install async, and the specified module will be installed in the current directory under. You come across a problem, and you decide that it’s time to use that cool library you keep hearing about – let’s use Caolan McMahon’s async as an example. Let’s say you’re hard at work one day, developing the Next Great Application.
Once you have a package you want to install, it can be installed with a single command-line command. These applications can be searched for on. A plethora of node.js libraries and applications are published on npm, and many more are added every day.
Npm, short for Node Package Manager, is two things: first and foremost, it is an online repository for the publishing of open-source Node.js projects second, it is a command-line utility for interacting with said repository that aids in package installation, version management, and dependency management.
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