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.