NVM for Windows
This is not the same thing as nvm! (expand for details)
The original nvm is a completely separate project for Mac/Linux only. This project uses an entirely different philosophy and is not just a clone of nvm. Details are listed in Why another version manager? and what's the big difference?.
Manage multiple installations of node.js on a Windows computer.
This has always been a node version manager, not an io.js manager, so there is no back-support for io.js. Node 4+ is supported. Remember when running
nvm install or
nvm use, Windows usually requires administrative rights (to create symlinks).
There are situations where the ability to switch between different versions of Node.js can be very useful. For example, if you want to test a module you're developing with the latest bleeding edge version without uninstalling the stable version of node, this utility can help.
Installation & Upgrades
⭐ ⭐ Uninstall any pre-existing Node installations!! ⭐ ⭐
Uninstall any existing versions of Node.js before installing NVM for Windows (otherwise you'll have conflicting versions). Delete any existing Node.js installation directories (e.g.,
%ProgramFiles%\nodejs) that might remain. NVM's generated symlink will not overwrite an existing (even empty) installation directory.
Alternatively, copy the settings to the user config
C:\Users\<user>\.npmrc. Delete the existing npm install location (e.g.
C:\Users\<user>\AppData\Roaming\npm) to prevent global module conflicts.
If NVM4W doesn't appear to work immediately after installation, restart the terminal/powershell (not the whole computer).
Reinstall any global utilities
After install, reinstalling global utilities (e.g. yarn) will have to be done for each installed version of node:
nvm use 14.0.0 npm install -g yarn nvm use 12.0.1 npm install -g yarn
To upgrade nvm-windows, run the new installer. It will safely overwrite the files it needs to update without touching your node.js installations. Make sure you use the same installation and symlink folder. If you originally installed to the default locations, you just need to click "next" on each window until it finishes.
nvm-windows runs in an Admin shell. You'll need to start
powershell or Command Prompt as Administrator to use nvm-windows
NVM for Windows is a command line tool. Simply type
nvm in the console for help. The basic commands are:
nvm arch [32|64]: Show if node is running in 32 or 64 bit mode. Specify 32 or 64 to override the default architecture.
nvm current: Display active version.
nvm install <version> [arch]: The version can be a specific version, "latest" for the latest current version, or "lts" for the most recent LTS version. Optionally specify whether to install the 32 or 64 bit version (defaults to system arch). Set [arch] to "all" to install 32 AND 64 bit versions. Add
--insecureto the end of this command to bypass SSL validation of the remote download server.
nvm list [available]: List the node.js installations. Type
availableat the end to show a list of versions available for download.
nvm on: Enable node.js version management.
nvm off: Disable node.js version management (does not uninstall anything).
nvm proxy [url]: Set a proxy to use for downloads. Leave
[url]blank to see the current proxy. Set
[url]to "none" to remove the proxy.
nvm uninstall <version>: Uninstall a specific version.
nvm use <version> [arch]: Switch to use the specified version. Optionally use
newestis the latest installed version. Optionally specify 32/64bit architecture.
nvm use <arch>will continue using the selected version, but switch to 32/64 bit mode. For information about using
usein a specific directory (or using
.nvmrc), please refer to issue #16.
nvm root <path>: Set the directory where nvm should store different versions of node.js. If
<path>is not set, the current root will be displayed.
nvm version: Displays the current running version of NVM for Windows.
nvm node_mirror <node_mirror_url>: Set the node mirror.People in China can use https://npm.taobao.org/mirrors/node/
nvm npm_mirror <npm_mirror_url>: Set the npm mirror.People in China can use https://npm.taobao.org/mirrors/npm/
Please note that any global npm modules you may have installed are not shared between the various versions of node.js you have installed. Additionally, some npm modules may not be supported in the version of node you're using, so be aware of your environment as you work.
Users have reported some problems using antivirus, specifically McAfee. It appears the antivirus software is manipulating access to the VBScript engine. See issue #133 for details and resolution.
Releases up to v1.1.7 are code-signed by Ecor Ventures LLC/Author.io. This should help prevent false positives with most antivirus software. v1.1.8+ is not code signed (see release notes for reasons).
npm i -g yarn
See the wiki for details.
Build from source
- Install go from http://golang.org
- Download source / Git Clone the repo
- Change GOARCH to amd64 in build.bat if you feel like building a 64-bit executable
- Fire up a Windows command prompt and change directory to project dir
go get github.com/blang/semver
go get github.com/olekukonko/tablewriter
- Check the
distdirectory for generated setup program.
💡 Why another version manager?
There are several version managers for node.js. Tools like nvm and n only run on Mac OSX and Linux. Windows users are left in the cold? No. nvmw and nodist are both designed for Windows. So, why another version manager for Windows?
The architecture of most node version managers for Windows rely on
.bat files, which do some clever tricks to set or mimic environment variables. Some of them use node itself (once it's downloaded), which is admirable, but prone to problems. Right around node 0.10.30, the installation structure changed a little, causing some of these to just stop working with anything new.
Additionally, some users struggle to install these modules since it requires a little more knowledge of node's installation structure. I believe if it were easier for people to switch between versions, people might take the time to test their code on back and future versions... which is just good practice.
💡 What's the big difference?
First and foremost, this version of nvm has no dependency on node. It's written in Go, which is a much more structured approach than hacking around a limited
.bat file. It does not rely on having an existing node installation. Go offers the ability to create a Mac/Linux version on the same code base. In fact, this is already underway.
The control mechanism is also quite different. There are two general ways to support multiple node installations with hot switching capabilities. The first is to modify the system
PATH any time you switch versions, or bypass it by using a
.bat file to mimic the node executable and redirect accordingly. This always seemed a little hackish to me, and there are some quirks as a result of this implementation.
The second option is to use a symlink. This concept requires putting the symlink in the system
PATH, then updating its target to the node installation directory you want to use. This is a straightforward approach, and seems to be what people recommend.... until they realize just how much of a pain symlinks are on Windows. This is why it hasn't happened before.
In order to create/modify a symlink, you must be running as an admin, and you must get around Windows UAC (that annoying prompt). Luckily, this is a challenge I already solved with some helper scripts in node-windows. As a result, NVM for Windows maintains a single symlink that is put in the system
PATH during installation only. Switching to different versions of node is a matter of switching the symlink target. As a result, this utility does not require you to run
nvm use x.x.x every time you open a console window. When you do run
nvm use x.x.x, the active version of node is automatically updated across all open console windows. It also persists between system reboots, so you only need to use nvm when you want to make a change.
NVM for Windows comes with an installer, courtesy of a byproduct of my work on Fenix Web Server.
Overall, this project brings together some ideas, a few battle-hardened pieces of other modules, and support for newer versions of node.
NVM for Windows recognizes the "latest" versions using a list provided by the Node project. Version 1.1.1+ use this list. Before this list existed, I was scraping releases and serving it as a standalone data feed. This list was used in versions 1.1.0 and prior, but is now deprecated.
I needed it, plain and simple. Additionally, it's apparent that support for multiple versions is not coming to node core. It was also an excuse to play with Go.
Why Go? Why not Node?
Thanks to everyone who has submitted issues on and off Github, made suggestions, and generally helped make this a better project. Special thanks to
- @vkbansal, who provided significant early feedback throughout the early releases.
- @rainabba and @sullivanpt for getting Node v4 support integrated.
- @s-h-a-d-o-w who resolved the longstanding space escaping issue in path names (#355).