We have downloaded this project and just based on this the contents of this packaged JSON, we can simply run npm i. If we actually go ahead and delete our node modules folder, you can pretend you are a different developer now. Now, I mentioned the benefits of installing things to packaged JSONs like this. You want to install those into dev dependencies and so for that you can use the -D flag and it will list that dependency in the dev dependencies section. For example, you can enter a version value such as 0. Other npm arguments - Specify other standard npm arguments. This above command installs three packages, which are express, cors and body-parser. Selected version - Select the version of the package you want to install. Most commonly, it is used to publish, discover, install, and develop node programs. It is extremely configurable to support a wide variety of use cases. It puts modules in place so that node can find them, and manages dependency conflicts intelligently. Example: npm install express cors body-parser. npm is the package manager for the Node JavaScript platform. Essentially what this does is things like test libraries-like Mocha or anything else-that are only going to be used if somebody is working on your module. To install multiple packages, we need to use the npm install followed by the multiple package names separated by the spaces package1 package2. Additionally, the myfolder has it's own package. This assumes a myfolder sub-directory exists in the same location as package.json. So if we now look at this, we've got Underscore in our dependencies and Mocha is in our dev dependencies. When a folder argument is specified, npm install downloads everything from the specified location to the original nodemodules directory at the root of the project. If you use -d, the dependencies are going to get installed to the dev dependencies part of your packaged JSON. One other way to do things-and sort of another tip-is you can use simply npm i to install. Now that we've run this command, you can see if we open the node modules folder here, we've got Underscore installed and it's right there for us. What that means is that when somebody else downloads my project, they can simply run npm install without any arguments and using the package JSON dependencies listed, NPM will know exactly what to install. In this blog post we'll cover the basics but also three lesser known features of npm scripts and how you. And what the -s is going to do is its going to make sure that dependency that we have just installed is now listed in this package.json file. npm scripts are a great way to automate common tasks during your Node.js development flow.
The first thing we're going to install is Underscore, so I'm just going to say, "npm install -s_". Normally, we install a single package using the npm install command followed by the package-name.
#NPM INSTALL ARGUMENTS HOW TO#
Man 1: Now that we have our packaged JSON established, we can start actually installing some dependencies that we're going to use for our project. Learn, how to install multiple packages with a single command in npm.
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