When in "prod" or "production", this is an alias to production. Which my friends and I find useful as you can run it locally and point it to github to search the dependency tree when you cannot actually install locally. Let’s see what happens when we create a broken situation: Tree views are great for human readability, but some times you want to pipe that stuff to another program. For example, if I do npm -ls lodash I get a huge tree, mostly all on the latest version.
The tree shown will be the logical dependency tree, based on the package dependencies, and not the physical layout of your node_modules folder. The iterator function is mostly a style preference, but can be handy if you need to throw an error and stop traversal. This command will list the installed packages in an environment, else it will return empty. Display only dependencies which are linked, The current stable version of npm is here. Meaning to say, the lockfile will not be used as the source of truth. Conclusion. install: It is a good idea to install things if you don't need the symbolic link. When you run it as ll or la, it will show extended information by default.

The only required argument is the initial path, the rest can be omitted. That said, as far as I know (and I could totally be wrong!) This means that npm was able to resolve a version of that module that met the requirements of multiple dependencies that require it to be installed. Displays only the dependency tree for packages in dependencies. Being able to understand our dependency tree better is awesome! Since express isn’t actually a dependency of npm, it shows up with that “extraneous” marker. You can even check manually from the package.json file. Indeed it does, but it’s an antiquated approach that I try to keep out of my open-source packages. For example, if I wanted to find all instances of graceful-fs in my dependency tree I can run npm ls graceful-fs which will spit out the following: For me, this is a stand-out feature! I've been exploring npm ls a bit over the past few days, so I wanted to share my knowledge with y'all.

Show parseable output instead of tree view. For that output, I took the same datastructure, but instead of building up a treeview string for each line, it spits out just the folders like this: Since you sometimes want a bigger view, I added the --long option to (shorthand: -l) to spit out more info: And, if you want to get at the globally-installed modules, you can use ls with the global flag: Those -> flags are indications that the package is link-installed, which will be covered in the next installment. ‘ ls’ simply means list and — depth 0 is used as we want to only see the packages that we installed directly at depth 0, … This command will print to stdout all the versions of packages that are You can also browse the source of the npm package at https://unpkg.com/vue-ls/ Also available on jsDelivr or cdnjs, but these two services take some time to sync so the latest release may not be available yet. Understanding the modules introduced into production is fantastic and super valuable. global mode: npm will install packages into the install prefix at, local mode: npm will install packages into the current project directory, which will default to the current working directory.

One neat feature of npm ls is the ability to pass a package name as an argument to the command. The package manager for the Node JavaScript platform, is npm.

Additionally, it will return a non-zero exit code if the dependency tree that's resolved in node_modules is not what should be resolved from package.json.