# survivejs/webpack-merge

Merge designed for webpack

Repository: https://github.com/survivejs/webpack-merge
Canonical: https://ross.abutalabs.com/products/webpack-merge
Homepage: https://www.npmjs.com/package/webpack-merge
Language: TypeScript
License: MIT
License Family: permissive
Topics: webpack, merging-loaders, webpack-specifics
Last push: 2024-07-12T06:35:58+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4086, "days_push": 782, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2683, forks 111 (observed 2026-08-28T04:07:10.139769+00:00)

## What it is
webpack-merge is a TypeScript library providing a merge function designed for webpack configuration objects, concatenating arrays and merging objects with right-side precedence. It supports customizable merge behavior per field and handles functions by executing and re-wrapping them.

## Use cases
- merge webpack config files
- combine common and environment-specific webpack configurations
- concatenate arrays when merging build configs
- customize merge behavior for specific config keys
- split webpack config into development and production variants

## When to choose
- you maintain multiple webpack configuration files that share common settings
- you need smart merging of webpack-specific fields like loaders and extensions
- you want a battle-tested merge utility with webpack semantics

## When to avoid
- you need to merge Promise-wrapped configurations
- your project uses a bundler other than webpack with different config semantics
- you need deep merging of arbitrary non-config data structures

## Facets
- artifact type: library
- maturity: stable
- function: configuration-management, developer-tools
- domain: developer-tools, web-development, frontend
- platform: -
- tags: webpack, merge, build-configuration, typescript, nodejs, javascript

## Member repositories
- survivejs/webpack-merge (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:10.139769+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:17:53.947351+00:00, confidence not recorded.
  - readme: https://github.com/survivejs/webpack-merge (fetched 2026-08-28T04:07:10.139769+00:00, sha b6fb2187eb3b)
  - registry_npm: https://registry.npmjs.org/webpack-merge (fetched 2026-08-29T10:00:24.219732+00:00, sha d6c01b3921cf)
- Data as of 2026-08-30T08:39:29.467469+00:00.