Registry / devops / emit-changed-only-webpack-plugin

emit-changed-only-webpack-plugin

library2.1.4jsnpmunverified

Webpack production plugin that prevents identical output files from being re-emitted after a rebuild, preserving cache headers (ETag, Last-Modified) for unchanged assets. Current stable version 2.1.4 requires webpack ^4.0.0. Key differentiator: focuses on file emission behavior rather than chunk-level comparison, using [contenthash] to detect changes. Helps improve browser caching and V8 code caching by avoiding unnecessary file modifications. Ships TypeScript types.

devops web-framework

npm install emit-changed-only-webpack-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · EMIT-CHANGED-ONLY-

emit-changed-only-webpack-plugin

devopsjavascriptv2.1.4

Install

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Import

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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.

EmitChangedOnlyPlugin

✓ const EmitChangedOnlyPlugin = require('emit-changed-only-webpack-plugin')

✗ import EmitChangedOnlyPlugin from 'emit-changed-only-webpack-plugin'

Package is CommonJS only. ES module import will fail. If TypeScript, use `import EmitChangedOnlyPlugin = require(...)` or set `esModuleInterop`.

default

✓ import EmitChangedOnlyPlugin from 'emit-changed-only-webpack-plugin'

✗ import { EmitChangedOnlyPlugin } from 'emit-changed-only-webpack-plugin'

Default export only. Named import does not exist.

EmitChangedOnlyPlugin

✓ new EmitChangedOnlyPlugin({ exclude: /\.html$/i })

✗ new EmitChangedOnlyPlugin()

Always pass at least an options object; omitting may cause unexpected behavior with default options (e.g., production mode required).

Minimal webpack configuration using the plugin with contenthash filenames and an HTML exclusion pattern.

const EmitChangedOnlyPlugin = require('emit-changed-only-webpack-plugin'); module.exports = { output: { path: './dist', filename: '[name].[contenthash].js' }, plugins: [ new EmitChangedOnlyPlugin({ exclude: /\.html$/i }) ] };

Debug

Known issues

gotchaPlugin requires [contenthash] in output filename; without it, file comparison is unreliable and plugin may emit all files every build.

fix

Add [contenthash] to output.filename, e.g., '[name].[contenthash].js'.

affects: >=1.0.0

gotchaProduction mode is enforced by default. If mode is not 'production', plugin will skip logic and may not behave as expected.

fix

Set mode: 'production' in webpack config, or pass production: false in plugin options.

affects: >=2.0.0

gotchaThe plugin removes outdated files in the output directory. Any files that are not produced by webpack and not excluded may be deleted.

fix

Add patterns to exclude option to protect non-plugin files, e.g., exclude: /\.(txt|png)$/i.

affects: >=1.0.0

gotchaUsing splitChunks: false will disable chunk splitting optimization; only the entry chunk is emitted. Default is true.

fix

If you want chunk splitting, keep splitChunks: true (default). Set to false only if you know you don't need it.

affects: >=2.0.0

Errors

Common errors & fixes

TypeError: plugin is not a constructor

Importing as ES module named import or using wrong require path.

fix

Use const EmitChangedOnlyPlugin = require('emit-changed-only-webpack-plugin');

Cannot find module 'emit-changed-only-webpack-plugin'

Package not installed or misspelled npm package name.

fix

npm install emit-changed-only-webpack-plugin --save-dev

Error: Webpack mode must be 'production'

Plugin enforces production mode by default.

fix

Set mode: 'production' or pass production: false in plugin options.

Error: No output filename with [contenthash] found

Output filename does not contain [contenthash].

fix

Add [contenthash] to output.filename, e.g., '[name].[contenthash].js'.

Upgrade

Version history

2.1.4latest on npm

Audit

Dependencies

webpackrequiredPeer dependency; plugin integrates with webpack's compiler hooks

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/stefvw93/emit-changed-only-webpack-plugin ↗

packagehttps://www.npmjs.com/package/emit-changed-only-webpack-plugin ↗