Registry / devops / rollup-plugin-merge

rollup-plugin-merge

library0.2.1jsnpmunverified

A Rollup plugin to merge multiple JSON files into a single JSON output during the build process. Current stable version is 0.2.1, with no recent updates and a small scope. It supports recursive merging, watching for changes, and optional pretty-printing. Unlike general-purpose merge tools, it integrates directly into Rollup's plugin system. Use with caution due to infrequent maintenance.

devops

npm install rollup-plugin-merge

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-MERG

rollup-plugin-merge

devopsjavascriptv0.2.1

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.

default

✓ import merge from 'rollup-plugin-merge'

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

ESM-only; does not support CommonJS require.

MergeOptions

✓ import type { MergeOptions } from 'rollup-plugin-merge'

TypeScript users; the package does not ship types, but you can define your own for options.

rollup-plugin-merge

✓ import merge from 'rollup-plugin-merge'

✗ import { default as merge } from 'rollup-plugin-merge'

Default import is the only way; no named exports.

Example of merging two JSON files into a single output during Rollup build with recursive merge and prettification.

import merge from 'rollup-plugin-merge'; export default { input: 'src/index.js', output: { file: 'dist/bundle.js', format: 'iife', name: 'app' }, plugins: [ merge({ input: ['src/file1.json', 'src/file2.json'], output: 'dist/config.json', recursive: true, prettify: true, watch: true }) ] };

Debug

Known issues

gotchaThe 'recursive' option is misspelled as 'recurisve' in the documentation; use 'recursive' (correct spelling) in config.

fix

Use 'recursive' instead of 'recurisve' in the options object.

affects: <=0.2.1

deprecatedNo updates since 2019; may not work with latest Rollup versions (v3+).

fix

Consider alternatives like @rollup/plugin-json or manual merging.

affects: >0.2.1

gotchaPlugin uses CJS internally, but package is ESM-only; may cause issues in mixed module environments.

fix

Ensure your project is configured for ESM imports.

affects: 0.2.1

gotchaWatching ('watch' option) only copies files on start; does not trigger full rebuild.

fix

Set 'watch: true' only if you want initial copy; use Rollup's watch mode for rebuilds.

affects: 0.2.1

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module not supported.

Package is ESM-only, but CommonJS require() is used.

fix

Use import instead: import merge from 'rollup-plugin-merge'

TypeError: merge is not a function

Importing the plugin incorrectly (e.g., named import instead of default).

fix

Use default import: import merge from 'rollup-plugin-merge'

Plugin error: Cannot find module 'rollup-plugin-merge'

Package not installed or missing from node_modules.

fix

Run npm install rollup-plugin-merge --save-dev

Upgrade

Version history

0.2.1latest on npm

Audit

Dependencies

rollupoptionalPeer dependency; the plugin is designed to work with Rollup plugin system

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/zont/rollup-plugin-merge ↗

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