Registry / devops / rollup-plugin-concat

rollup-plugin-concat

library1.0.4jsnpmunverified

A Rollup plugin that concatenates files into single output files during the buildStart hook, making them available for import by other plugins. Version 1.0.4 is stable but has no recent updates (last release likely pre-2020). Key differentiator: integrates directly into Rollup's build pipeline with grouped file configurations. Alternative to manual concatenation or separate build steps.

devops

npm install rollup-plugin-concat

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-CONC

rollup-plugin-concat

devopsjavascriptv1.0.4

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 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

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

concat

✓ import concat from 'rollup-plugin-concat'

✗ const concat = require('rollup-plugin-concat')

ESM-only; CommonJS require will fail unless project uses esModuleInterop.

default export

✓ import concat from 'rollup-plugin-concat'

✗ import { concat } from 'rollup-plugin-concat'

The plugin exports a default function only.

Configures rollup-plugin-concat to concatenate fileA.js and fileB.js into ab.js before bundling.

import concat from 'rollup-plugin-concat'; export default { input: 'src/index.js', output: { file: 'bundle.js', format: 'esm' }, plugins: [ concat({ groupedFiles: [ { files: ['./fileA.js', './fileB.js'], outputFile: './ab.js' } ] }) ] };

Debug

Known issues

gotchaPlugin only runs on buildStart hook; output files are generated before subsequent plugins run, but are not watched for changes.

fix

Ensure that concatenated files are static or trigger a rebuild manually if they change.

affects: >=1.0

gotchaOutput file paths are relative to the current working directory, not relative to the Rollup config file.

fix

Use absolute paths or resolve relative to __dirname.

affects: >=1.0

deprecatedThe package has not been updated in several years; may not work with Rollup 3+ due to hook changes.

fix

Consider using @rollup/plugin-multi-entry or manual concatenation scripts.

affects: >=2.0

Errors

Common errors & fixes

Error: Cannot find module 'rollup-plugin-concat'

Package not installed or import path incorrect.

fix

Run: npm install rollup-plugin-concat --save-dev

TypeError: concat is not a function

Imported as named export instead of default.

fix

Use: import concat from 'rollup-plugin-concat'

[!] (plugin concat) Error: groupedFiles must be an array

Options object missing groupedFiles or not an array.

fix

Provide options as { groupedFiles: [ {...} ] }

Upgrade

Version history

1.0.4latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

9 hits · last 30 days

node

Resources

githubhttps://github.com/mdownes/rollup-plugin-concat ↗

packagehttps://www.npmjs.com/package/rollup-plugin-concat ↗