package.json minifier

Creates a consumer-facing package.json after build files have been copied to dist.

npx package.json-minifier
npx package.json-minifier --output-path build/package.json
npx package.json-minifier --pretty

It removes source-only fields and non-install scripts, warns about unknown top-level fields, and rejects files. Only preinstall, install, and postinstall scripts remain.

Use the API when the output needs project-specific changes:

const fs = require('node:fs');
const { minifyPackageJson } = require('package.json-minifier');

const input = JSON.parse(fs.readFileSync('package.json', 'utf8'));
const output = minifyPackageJson(input, {
  stripPackagePathPrefix: './dist/',
  includeFields: ['react-native']
});

fs.writeFileSync('dist/package.json', JSON.stringify(output));

• stripPackagePathPrefix removes one exact leading prefix from entry-point fields: ./dist/index.js becomes ./index.js. Non-matching paths are unchanged.
• includeFields can retain non-standard or normally omitted fields, including their nested values.
• Unknown fields use warnUnknownField, which warns and returns true, by default. A custom onUnknownField must return true to handle the field; a falsy return throws an error.
• Less commonly needed helpers and policy constants are documented by the bundled TypeScript declarations.