Registry / devops / webpack-deduplication-plugin

webpack-deduplication-plugin

library0.0.8jsnpmunverified

Webpack plugin that deduplicates transitive dependencies in yarn and webpack-based projects. Version 0.0.8 (stable, low release cadence) by Atlassian Labs. Uses content-based caching via yarn.lock to avoid duplicate modules. Differentiator: targeted at monorepo or complex dependency trees where multiple versions of the same package are bundled, reducing bundle size. Compared to alternatives like DedupePlugin, this plugin persists cache across builds and integrates tightly with yarn workspace resolution. Currently in early development; lacking documentation and tests.

devops

npm install webpack-deduplication-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · WEBPACK-DEDUPLICAT

webpack-deduplication-plugin

devopsjavascriptv0.0.8

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.

WebpackDeduplicationPlugin

✓ import { WebpackDeduplicationPlugin } from 'webpack-deduplication-plugin'

✗ const WebpackDeduplicationPlugin = require('webpack-deduplication-plugin').default

Package exports a named export, not a default. CommonJS require with named destructuring works too: const { WebpackDeduplicationPlugin } = require('...')

Shows how to configure and use WebpackDeduplicationPlugin in webpack.config.js with cacheDir and rootPath.

// webpack.config.js const path = require('path'); const { WebpackDeduplicationPlugin } = require('webpack-deduplication-plugin'); const cacheDirPath = path.resolve(__dirname, '.cache/webpack-deduplication'); const rootPath = path.resolve(__dirname, '.'); module.exports = { context: __dirname, entry: './src/index.js', output: { path: path.resolve(__dirname, 'dist'), filename: 'bundle.js', }, plugins: [ new WebpackDeduplicationPlugin({ cacheDir: cacheDirPath, rootPath: rootPath, }), ], };

Debug

Known issues

gotchaPlugin is experimental; may not handle all edge cases in dependency deduplication.

fix

Test thoroughly in your project; contribute fixes if issues arise.

affects: >=0.0.1

gotchacacheDir is not cleaned automatically; stale cache may cause incorrect deduplication after dependency changes.

fix

Manually delete cacheDir when yarn.lock changes or dependencies update.

affects: >=0.0.1

gotchaPlugin requires webpack 4 or 5; not tested with other bundlers.

fix

Use only with webpack 4+; check compatibility with your webpack version.

affects: >=0.0.1

Errors

Common errors & fixes

TypeError: Cannot read property 'context' of undefined

WebpackDeduplicationPlugin expects a webpack compiler object with context; misconfigured plugin order.

fix

Ensure plugin is added to plugins array after other plugins that modify compiler context, or set rootPath explicitly.

Error: ENOENT: no such file or directory, open '.../yarn.lock'

Plugin cannot find yarn.lock because rootPath is incorrect or project uses npm/pnpm.

fix

Provide correct rootPath or ensure a yarn.lock file exists at the root; plugin currently only supports yarn.

Module not found: Error: Can't resolve 'app-root-path'

app-root-path is an optional dependency; if missing and rootPath not provided, plugin throws.

fix

Install app-root-path as a dev dependency or provide rootPath explicitly.

Upgrade

Version history

0.0.8latest on npm

Audit

Dependencies

app-root-pathoptionalUsed to auto-detect project root if not provided

Agent activity

8 hits · last 30 days

node

Resources

githubhttps://github.com/atlassian-labs/webpack-deduplication-plugin ↗

packagehttps://www.npmjs.com/package/webpack-deduplication-plugin ↗