I recently wrote about how we have huge
node_modules folders and why this is not necessarily a bad thing, but it would be reduce that hard drive consumption, right?
Every byte saved on disk can be used for something else than libraries code, I have a 512GB SSD on my MacBook Pro I bought in 2010 but some brand new computers in 2019 ship with a 128GB SSD (something went wrong with Moore’s Law when it comes to hard disk space).
In particular, one way would be to centralize the libraries code storage into a central place, and share it with all the projects you work on.
This is the main value proposition of pnpm, a very cool project you can check out at https://pnpm.js.org.
It is basically a drop-in replacement for
npm, which means that once you install it, you can invoke
pnpm install to download a project dependencies, and all will work transparently for you.
If you have 10 projects that use React, at the same version,
pnpm will install it once, and then reference that first install across all your other projects.
This also means that the project initialization part takes much less time than if it had to download resources using the standard
npm procedure. It’s faster even if
npm cached the package, because
pnpm makes a hard link to the central local repository, while
npm makes a copy of the package from the cache.
npm, of course 😁
npm install -g pnpm
pnpm a drop-in replacement, you can use all the
pnpm install react pnpm update react pnpm uninstall react
and so on.
pnpm is especially appreciated in those companies where there is a need to maintain a large number of projects with the same dependencies.
For example Glitch is one of those companies, as they host a gazillion Node.js projects.
pnpm gives them, in addition to the
npm usual commands, some utilities including
pnpm recursive, which is used to run the same command across all the projects in a folder. For example you can initialize 100 projects stored in the current folder by running
pnpm recursive install. Handy.
If you use
npx, which is a handy (and the recommended) way to run utilities like
create-react-app, you’ll get the benefits of
pnpm by using the
pnpx command which comes with
pnpx create-react-app my-cool-new-app
Where are the packages installed? In macOS, in the
~/.pnpm-store/ folder (where
~ means your home folder). I installed
lodash as an example and this was the resulting folder structure:
➜ ~ tree .pnpm-store/ .pnpm-store/ └── 2 ├── _locks ├── registry.npmjs.org │ └── lodash │ ├── 4.17.11 │ │ ├── integrity.json │ │ ├── node_modules │ │ │ └── lodash │ │ │ ├── ... │ │ ├── package -> node_modules/lodash │ │ └── packed.tgz │ └── index.json └── store.json
There are many more advanced things to learn about the tool, but I hope this helps getting you started with
Should you use it for a day-to-day use? Probably not, just stick to
npm unless you have needs that this tool solves for you - lack of disk space being one of them.
More node tutorials:
- The Node.js Event Loop
- Node, the difference between development and production
- How to mass rename files in Node.js
- How to get both parsed body and raw body in Express
- The Node fs module
- A brief history of Node.js
- How to test an npm package locally
- HTTP requests in Node using Axios
- How to use the Node.js REPL