Clean package.json in prepack hook before publishing your package by removing unnecessary properties.

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Purpose?

package.json most of the time gets filled up with development related information ex: devDependencies and configuration like eslintConfig, prettier, lint-staged, simple-git-hooks, etc.

If you are building npm package or micropackages where every byte matters then you can use clean-package-dot-json in a prepack hook to remove unnecessary properties from package.json.

Install

npm install --save-dev clean-package-dot-json

Usage

Add clean-package-dot-json to the prepack hook, which runs before npm publish and npm pack.

// package.json
{
  name: 'my-package',
  // ...
  scripts: {
    // ...
    prepack: 'node ./node_modules/.bin/clean-package-dot-json',
  },
}

Flags

| Flag | Description | | ------------------------------ | ------------------------------------------------------------------------------------------ | | -i, --ignore <property name> | Property names to ignore during cleanup. Accepts multiple flags or a comma-delimited list. | | -v, --verbose | Verbose logs. | | -d, --dry | Dry run mode. Instead of writing to disk, it will log it. |

Default ignored properties

By default, these properties are ignored in package.json:

npm

• name
• version
• private
• publishConfig
• scripts.preinstall
• scripts.install
• scripts.postinstall
• scripts.dependencies
• files
• bin
• browser
• main
• man
• dependencies
• peerDependencies
• peerDependenciesMeta
• bundledDependencies
• optionalDependencies
• engines
• os
• cpu
• description
• keywords
• author
• contributors
• license
• homepage
• repository
• bugs
• funding

CDNs

• jsdelivr
• unpkg

Node.js

• type
• exports
• imports

VSCode Extension Manifest

• sponsor
• publisher
• displayName
• categories
• galleryBanner
• preview
• contributes
• activationEvents
• badges
• markdown
• qna
• sponsor
• extensionPack
• extensionDependencies
• extensionKind
• icon

Angular Package Format

• fesm2020
• fesm2015
• esm2020
• es2020

TypeScript

• types
• typings
• typesVersions

Bundlers (Webpack, Rollup, esbuild)

• module
• sideEffects