nvm + execa = nvexeca.

Execa improves child processes execution with a promise interface, cross-platform support, local binaries, interleaved output, and more.

nvexeca is a thin wrapper around Execa to run any file or command using any Node.js version.

Unlike nvm exec it:

• is run programmatically
• does not need a separate installation step for each Node version
• can run the major release's latest minor/patch version automatically
• does not require Bash
• is installed as a Node module
• works on Windows. No need to run as Administrator.

nvexeca executes a single file or command. It does not change the node nor npm global binaries. To run a specific Node.js version for an entire project or shell session, please use nvm, nvm-windows, n or nvs instead.

import nvexeca from 'nvexeca'

const { childProcess, versionRange, version } = await nvexeca('8', 'node', [
  '--version',
])
console.log(`Node ${versionRange} (${version})`) // Node 8 (8.16.2)
const { exitCode, stdout, stderr } = await childProcess
console.log(`Exit code: ${exitCode}`) // 0
console.log(stdout) // v8.16.2

npm install nvexeca

node >=18.18.0 must be installed. However the command run by nvexeca can use any Node version (providing it is compatible with it).

This package is an ES module and must be loaded using an import or import() statement, not require(). If TypeScript is used, it must be configured to output ES modules, not CommonJS.

To use this as a CLI instead, please check nve.

Executes command ...args with a specific Node.js versionRange.

Type: string

This can be:

• any version range such as 12, 12.6.0 or <12
• latest: Latest available Node version
• lts: Latest LTS Node version
• global: Global Node version
  • Using the home directory .nvmrc or package.json (engines.node field)
  • Some similar files used by other Node.js version managers are also searched for
  • If nothing is found, defaults to the current process's Node version
• local: Current directory's Node version
  • Using the current directory or parent directories .nvmrc, package.json (engines.node field) or similar files
  • Defaults to the global version
• a file path towards a .nvmrc, package.json (engines.node field) or similar files

Type: string

File or command to execute. Both global and local binaries can be executed.

Must be compatible with the specific Node versionRange. For example npm is only compatible with Node >=6.

Type: string[]?

Arguments to pass to the command.

Type: object?

All Execa options are available. Please refer to Execa for the list of possible options.

The preferLocal option is always true.

The following options are also available.

Type: boolean
Default: false

Do not execute the command. This can be used to cache the initial Node.js binary download.

Type: boolean
Default: false

Whether to show a progress bar when the Node binary is downloading.

Type: string
Default: https://nodejs.org/dist

Base URL to retrieve Node binaries. Can be overridden (for example https://npmmirror.com/mirrors/node).

The following environment variables can also be used: NODE_MIRROR, NVM_NODEJS_ORG_MIRROR, N_NODE_MIRROR or NODIST_NODE_MIRROR.

Type: boolean
Default: undefined

The list of available Node.js versions is cached for one hour by default. If the fetch option is:

• true: the cache will not be used
• false: the cache will be used even if it's older than one hour

Type: string
Default: process.arch

Node.js binary's CPU architecture. This is useful for example when you're on x64 but would like to run Node.js x32.

All the values from process.arch are allowed except mips and mipsel.

Type: string | URL
Default: process.cwd()

Current working directory of the child process.

When using the local alias, this also starts looking for a Node.js version file from this directory.

Type: Promise<object>

Promise resolved after the Node.js version has been cached locally (if it has not been cached yet).

If you want to wait for the command to complete as well, you should await the returned childProcess.

const { childProcess } = await nvexeca('8', 'node', ['--version'])
const { exitCode, stdout, stderr } = await childProcess

Type: ResultPromise?

childProcess instance. It is also a Promise resolving or rejecting with a Result. The Promise should be awaited if you want to wait for the process to complete.

This is undefined when the dry option is true.

Type: string

Node.js version passed as input, such as "v10".

Type: string

Normalized Node.js version. For example if "v10" was passed as input, version will be "10.17.0".

Type: string

File or command that was executed.

Type: string[]

Arguments that were passed to the command.

Type: object

Options that were passed to Execa.

The first time nvexeca is run with a new VERSION, the Node binary is downloaded under the hood. This initially takes few seconds. However subsequent runs are almost instantaneous.

If your code is using native modules, nvexeca works providing:

• they are built with N-API
• the target Node.js version is >=8.12.0 (since N-API was not available or stable before that)

Otherwise the following error message is shown: Error: The module was compiled against a different Node.js version.

• nve: nvexeca as a CLI
• execa: Process execution for humans
• get-node: Download Node.js
• preferred-node-version: Get the preferred Node.js version of a project or user
• node-version-alias: Resolve Node.js version aliases like latest, lts or erbium
• normalize-node-version: Normalize and validate Node.js versions
• all-node-versions: List all available Node.js versions
• fetch-node-website: Fetch releases on nodejs.org
• global-cache-dir: Get the global cache directory

For any question, don't hesitate to submit an issue on GitHub.

Everyone is welcome regardless of personal background. We enforce a Code of conduct in order to promote a positive and inclusive environment.

This project was made with ❤️. The simplest way to give back is by starring and sharing it online.

If the documentation is unclear or has a typo, please click on the page's Edit button (pencil icon) and suggest a correction.

If you would like to help us fix a bug or add a new feature, please check our guidelines. Pull requests are welcome!

ehmicky 💻 🎨 🤔 📖

Nicolas Goudry 📖

Pedro Augusto de Paula Barbosa 💬