Registry / devops / rollup-plugin-json-merge

rollup-plugin-json-merge

library0.0.2jsnpmunverified

A Rollup plugin (v0.0.2, stable but minimal) that merges multiple JSON sources into one output file during bundle build. Supports glob patterns, inline objects, and custom merge functions. Lightweight alternative to manual JSON combination in Rollup pipelines. No major updates since initial release; less feature-rich than @rollup/plugin-json combined with manual merging but simpler for single-file concatenation.

devops serialization

npm install rollup-plugin-json-merge

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-JSON

rollup-plugin-json-merge

devopsjavascriptv0.0.2

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-json-merge'

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

ESM-only package; use import syntax or dynamic import().

merge

✓ import merge from 'rollup-plugin-json-merge'

✗ import { merge } from 'rollup-plugin-json-merge'

Package exports a default function only, not a named export.

type Plugin

✓ import type { Plugin } from 'rollup'

✗ type Plugin = { ... }

TypeScript users should import Rollup's Plugin type separately; this package does not export types.

Minimal Rollup config that merges two JSON files into one output using the plugin.

import merge from 'rollup-plugin-json-merge'; export default { input: 'src/index.js', output: { dir: 'output', format: 'cjs' }, plugins: [ merge({ input: ['src/part1.json', 'src/part2.json'], fileName: 'combined.json', }), ], };

Debug

Known issues

gotchaPlugin may not handle conflicting keys across input files; uses shallow assign by default.

fix

Provide custom merge function via options.merge to handle conflicts (e.g., deep merge).

affects: 0.x

gotchaGlob patterns in input must resolve to absolute paths or relative to process.cwd(); no automatic resolution.

fix

Use path.resolve or ensure patterns are correct relative to working directory.

affects: 0.x

gotchaPlugin does not emit warnings for non-existent files; silent failure if no files matched.

fix

Validate input files exist before configuring plugin.

affects: 0.x

Errors

Common errors & fixes

Error: Cannot find module 'glob'

Missing glob peer dependency.

fix

npm install glob --save-dev

TypeError: merge is not a function

Using named import incorrectly.

fix

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

Error: Could not resolve 'rollup-plugin-json-merge'

Package not installed.

fix

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

Upgrade

Version history

0.0.2latest on npm

Audit

Dependencies

globrequiredUsed for file pattern matching in input configuration

rolluprequiredPeer dependency as a Rollup plugin

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/karolis-sh/rollup-plugin-json-merge ↗

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