Whoami

Commandline util for comparing chunk modules between two webpack stat json files. Basic Usage:

wcmp a.json b.json

Can I come over?

Installation is pretty easy:

npm install -g webpack-chunk-compare

Use me!

wcmp path/to/a/a.json path/to/a/b.json

What you get

--------------------
--  Contacts
--------------------

What "b" have that "a" doesn't
--------------
[ './special-lib.js' ]

What "a" have that "b" doesn't.
--------------
[]

--------------------
--  Common
--------------------

What "b" have that "a" doesn't
--------------
[]
What "a" have that "b" doesn't.
--------------
[ './lodash.js' ]

Use cases

Detecting why our chunk sizes changed in regards to previous project version.
Reviewing new modules.

Requirements

Util requires two webpack json stat files. More info on how to generate them.

Make sure that at least below options are set to true:

{
  // Add chunk information (setting this to `false` allows for a less verbose output)
  chunks: true,
  // Add built modules information to chunk information
  chunkModules: true,
  // Add built modules information
  modules: true,
  children: true
}

Optionally for more information use:

{
  // Add the origins of chunks and chunk merging info
  chunkOrigins: true,
}

Additional arguments

--chunk-name: Print only information about this specific chunk name
--a-name: Set name to be used for 'a' changes.
--b-name: Set name to be used for 'b' changes.
--verbose: Print more details (including module details)
--child-index: Show only child with given index. By default all children are processed.
--lose-matching: Looselly match children, instead of exact entrypoints matching. Usefull when we know that children project chunk definition changed. By default exact entrypoints matching is used.