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1.0.0 • Public • Published

Browserify Substitution Mass Confusion

NPM version

Browserify Substitution Mass Confusion is a plugin for Browserify that allows substituting modules through the package.json's' browser field in nested modules. By default Browserify only substitutes modules listed in the browser field in the same module the package.json file lives in. This expands it to work on all dependencies.


npm install browserify-substitution-mass-confusion

Browserify Substitution Mass Confusion follows semantic versioning, so feel free to depend on its major version with something like >= 1.0.0 < 2 (a.k.a ^1.0.0).


Enable the plugin and pass it a path to your package.json via the package option that contains the browser field you'd like to apply recursively.

browserify --plugin [ browserify-substitution-mass-confusion --package package.json ] --entry foo.js

Ideally I would've liked it to automatically find your package.json file, but I don't yet know how to implement that.

For example, to ensure React gets included in its minified form:

  "private": true,
  "dependencies": {
    "react": "",
    "react-dom": ""
  "browser": {
    "react": "react/dist/react.min.js",
    "react-dom": "react-dom/dist/react-dom.min.js",

Without Browserify Substitution Mass Confusion it'd work in your own files, the moment you require a dependency that in turn does require("react"), you'd get two Reacts — one minified and one not.


Browserify Substitution Mass Confusion is released under a Lesser GNU Affero General Public License, which in summary means:

  • You can use this program for no cost.
  • You can use this program for both personal and commercial reasons.
  • You do not have to share your own program's code which uses this program.
  • You have to share modifications (e.g. bug-fixes) you've made to this program.

For more convoluted language, see the LICENSE file.


Andri Möll typed this and the code.
Monday Calendar supported the engineering work.

If you find Browserify Substitution Mass Confusion needs improving, please don't hesitate to type to me now at or create an issue online.


npm i browserify-substitution-mass-confusion

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