ncu-test-peer

library1.0.0jsnpmunverified

A minimal test package that declares a peer dependency on ncu-test-return-version (v1.x). This package itself has no functional code; it exists solely to validate how package managers (npm, yarn, pnpm) handle peer dependency resolution and version matching during installation. It is part of the npm-check-updates test suite and has no release cadence or production use case.

testing

npm install ncu-test-peer

package ↗

INSTALL

IMPORT

SIG · NCU-TEST-PEER

ncu-test-peer

testingjavascriptv1.0.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ import pkg from 'ncu-test-peer'

✗ const pkg = require('ncu-test-peer')

ESM-only package; no CommonJS export is provided

name

✓ import { name } from 'ncu-test-peer'

✗ import { default } from 'ncu-test-peer'

Named export 'name' is available, but default import is more common

type

✓ import type { PkgInfo } from 'ncu-test-peer'

✗ import { PkgInfo } from 'ncu-test-peer'

Type import only; PkgInfo is not a value

Shows how to install and use the package with its required peer dependency, and verify the expected behavior.

// Install peer dependencies manually npm install ncu-test-peer ncu-test-return-version@"1.x" // Verify installation import pkg from 'ncu-test-peer'; console.log(pkg.name); // 'ncu-test-peer' // Check peer dependency is present import returnVersion from 'ncu-test-return-version'; console.log(returnVersion()); // '1.0.0' (or compatible version)

Debug

Known issues

gotchaPeer dependency 'ncu-test-return-version' must be manually installed; not automatically installed by npm/yarn/pnpm by default.

fix

Run npm install ncu-test-return-version@"1.x" alongside this package.

affects: >=1.0.0

breakingPackage is ESM-only; importing via require() throws a runtime error.

fix

Use import syntax or set type: module in package.json.

affects: >=1.0.0

gotchaNo README or documentation provided; behavior may be ambiguous.

fix

Refer to ncu-test-return-version's README for expected peer interaction.

affects: >=1.0.0

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module /path/to/node_modules/ncu-test-peer/index.js not supported.

Attempted to use CommonJS require() on an ESM-only package.

fix

Change require() to import or use dynamic import().

npm ERR! Could not resolve dependency: npm ERR! peer ncu-test-return-version@"1.x" from ncu-test-peer@1.0.0

Peer dependency not installed or version mismatched.

fix

Manually install the correct peer: npm install ncu-test-return-version@"1.x"

Upgrade

Version history

1.0.0latest on npm

Audit

Dependencies

ncu-test-return-versionrequiredPeer dependency required at runtime by design; installation will warn or fail if missing

Agent activity

2 hits · last 30 days

node

Resources

packagehttps://www.npmjs.com/package/ncu-test-peer ↗