Registry / ycp-rollup-starter-lib

ycp-rollup-starter-lib

library1.0.16jsnpmunverified

A bare-bones example repository demonstrating how to create a JavaScript library using Rollup, including importing a CommonJS module from node_modules. The library 'how-long-till-lunch' uses the 'ms' package to calculate time until lunch. This is a starter template, not a standalone library; version 1.0.16 is active but has no maintainer activity. Key differentiators: it provides CommonJS, ES module, and UMD builds via Rollup, with variations for Babel or Bublé transpilation. Not intended for production use as a dependency.

npm install ycp-rollup-starter-lib

package ↗

INSTALL

IMPORT

SIG · YCP-ROLLUP-STARTER

ycp-rollup-starter-lib

javascriptv1.0.16

Install

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Import

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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 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

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

default

✓ import howLongTillLunch from './how-long-till-lunch';

The library exports a default function.

require

✓ const howLongTillLunch = require('./how-long-till-lunch.cjs.js');

✗ const howLongTillLunch = require('how-long-till-lunch');

Use the CommonJS file path for Node.js require.

script tag

✓ <script src="dist/how-long-till-lunch.umd.js"></script>

The UMD build exposes the library as a global variable.

Shows how to clone, build, and use the example library with ES module import syntax, demonstrating the standard workflow for this starter.

// Clone and build the library git clone https://github.com/rollup/rollup-starter-lib.git cd rollup-starter-lib npm install npm run build // Create a test file: test.mjs import howLongTillLunch from './dist/how-long-till-lunch.esm.js'; console.log('Lunch in:', howLongTillLunch()); // Run with node node test.mjs

Debug

Known issues

gotchaThis package is a starter template, not a published library. Do not install it as a dependency (npm install ycp-rollup-starter-lib) expecting a usable library.

fix

Clone the GitHub repo instead: git clone https://github.com/rollup/rollup-starter-lib.git

affects: >=1.0.0

deprecatedThe Greenkeeper badge is outdated. Greenkeeper was acquired by Snyk and the service changed.

fix

Consider using Dependabot or Renovate for dependency updates.

affects: >=1.0.0

gotchaThe 'ms' dependency is a devDependency in the starter, but the example imports it as if it were a runtime dependency. This may confuse beginners.

fix

If you use the starter as a base for your own library, move 'ms' to dependencies if your library uses it at runtime.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'ms'

The 'ms' package is installed as a devDependency but your code uses it at runtime. Running the built library outside the project directory fails.

fix

Run npm install --save ms to add it as a runtime dependency, or ensure you run your application from within the project directory.

npm ERR! code ELIFECYCLE

Build script fails due to missing rollup or other dev dependencies.

fix

Run npm install before npm run build.

SyntaxError: Unexpected token 'export'

Trying to run the ES module file directly with older Node.js versions (<13) without ESM support.

fix

Use Node.js version 13 or later with --experimental-modules flag, or use the CommonJS bundle instead.

Upgrade

Version history

1.0.16latest on npm

Audit

Dependencies

msoptionalUsed in the example library to parse time strings like '2 hours'.

Agent activity

4 hits · last 30 days

node

Resources

packagehttps://www.npmjs.com/package/ycp-rollup-starter-lib ↗