Registry / devops / closure-webpack-plugin

closure-webpack-plugin

library2.6.1jsnpmunverified

A webpack plugin integrating Google Closure Compiler and Closure Library for JavaScript optimization and transpilation. Version 2.6.1 (webpack 4 branch) requires google-closure-compiler >=20200830.0.0 and webpack 4.x. Offers three platforms (native, Java, JavaScript) and two modes (STANDARD for minification/transpilation, AGGRESSIVE_BUNDLE for advanced module hoisting and optimization). Unlike TerserPlugin or Babel, it provides full Closure Compiler optimizations including dead code elimination, type checking, and cross-module analysis. Not compatible with webpack 5.

devops http-networking web-framework data serialization

npm install closure-webpack-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · CLOSURE-WEBPACK-PL

closure-webpack-plugin

devopsjavascriptv2.6.1

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 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

ClosurePlugin

✓ const ClosurePlugin = require('closure-webpack-plugin');

✗ import ClosurePlugin from 'closure-webpack-plugin';

Package does not provide a default ESM export; require() is required.

ClosurePlugin

✓ import ClosurePlugin = require('closure-webpack-plugin');

✗ import * as ClosurePlugin from 'closure-webpack-plugin';

In TypeScript, use `import = require()` for proper CommonJS interop; namespace import may fail.

ClosurePlugin as ClosurePlugin

✓ const { ClosurePlugin } = require('closure-webpack-plugin');

✗ const { default: ClosurePlugin } = require('closure-webpack-plugin');

No default export; use named export if the package's TypeScript typings allow it (but check actual typings).

Basic webpack config using closure-webpack-plugin as the minifier with JavaScript platform, STANDARD mode, and debug flags.

const ClosurePlugin = require('closure-webpack-plugin'); module.exports = { entry: './src/index.js', output: { filename: 'bundle.js', path: __dirname + '/dist' }, optimization: { minimizer: [ new ClosurePlugin({ mode: 'STANDARD', platform: 'javascript' }, { // compiler flags formatting: 'PRETTY_PRINT', debug: true, renaming: false }) ] } };

Debug

Known issues

breakingPlugin only works with webpack 4.x; not compatible with webpack 5.

fix

Use webpack 4 or switch to an alternative plugin for webpack 5.

affects: >=2.0.0

gotchaDo not set compiler flags module_resolution, output_wrapper, dependency_mode, create_source_map, module, or entry_point—they are controlled by the plugin and will conflict.

fix

Remove these flags from the compiler options object. They are overridden internally.

affects: >=1.0.0

deprecatedThe 'platform' option accepts strings 'native', 'java', 'javascript', but old documentation used case-insensitive values.

fix

Use lowercase strings as above. The plugin may also accept uppercase but it's not guaranteed.

affects: >=2.0.0

gotchaAGGRESSIVE_BUNDLE mode hoists require() calls, which can cause out-of-order execution if polyfills or side-effects are interleaved.

fix

Ensure modules with side-effects are separated into different chunks or mark them with sideEffects: false in package.json.

affects: >=1.0.0

gotchachildCompilations defaults to false—plugins like html-webpack-plugin may not get optimized output.

fix

Set childCompilations: true or a custom function if child compilations need closure optimization.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: ClosurePlugin is not a constructor

Importing the plugin incorrectly (using default import instead of require).

fix

Use `const ClosurePlugin = require('closure-webpack-plugin');`

Error: Cannot find module 'google-closure-compiler'

Required peer dependency not installed.

fix

Run `npm install --save-dev google-closure-compiler`

Error: webpack version 5.x is not supported

Using the plugin with webpack 5.

fix

Downgrade to webpack 4.x, or use an alternative plugin (e.g., terser-webpack-plugin) for webpack 5.

Upgrade

Version history

2.6.1latest on npm

Audit

Dependencies

google-closure-compilerrequiredPeer dependency providing the Closure Compiler binary; must be installed separately.

webpackrequiredPeer dependency; only compatible with webpack 4.x.

Agent activity

25 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/webpack-contrib/closure-webpack-plugin ↗

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