Registry / type-stubs / metro-minify-swc

metro-minify-swc

library1.0.0-alphajsnpmunverified

A drop-in replacement minifier for Metro bundler that uses SWC (Speedy Web Compiler) for fast JavaScript minification. Version 1.0.0-alpha is experimental and may not be stable. SWC's Rust-based implementation aims to provide better performance than Metro's default minifier. Requires metro >=0.80.0. Provides TypeScript types.

type-stubs

npm install metro-minify-swc

package ↗

INSTALL

IMPORT

SIG · METRO-MINIFY-SWC

metro-minify-swc

type-stubsjavascriptv1.0.0-alpha

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ const minifier = require('metro-minify-swc');

✗ import minifier from 'metro-minify-swc';

Package uses CommonJS exports; ESM import is not available.

minifier (named)

✓ const { minifier } = require('metro-minify-swc');

✗ import { minifier } from 'metro-minify-swc';

The default export is the minifier function, so destructuring may not work as expected. Prefer default import.

minifierPath in metro.config.js

✓ minifierPath: 'metro-minify-swc'

✗ minifierPath: 'metro-minify-swc/index.js'

Metro resolves the module automatically; specifying an index file is redundant and may cause resolution errors.

Shows how to configure Metro's transformer to use metro-minify-swc with custom compress and mangle options.

// metro.config.js module.exports = { transformer: { minifierPath: 'metro-minify-swc', minifierConfig: { compress: { drop_console: true, unused: true, }, mangle: { toplevel: true, }, }, }, };

Debug

Known issues

deprecatedPackage is 1.0.0-alpha and experimental; API may change without notice.

fix

Pin exact version and monitor releases for breaking changes.

affects: 1.0.0-alpha

gotchaminifierConfig must be an object; passing undefined or null can cause errors.

fix

Always provide an empty object if no configuration is needed: minifierConfig: {}.

affects: >=0.0.0

gotchaMetro's default minifier options are not automatically applied; you must specify all desired options.

fix

Explicitly set all minifier options in minifierConfig, including defaults.

affects: >=0.0.0

gotchaSWC minifier may produce slightly different output than Metro's default (Terser-based) minifier; test thoroughly.

fix

Verify bundle behavior in development and production environments.

affects: >=0.0.0

Errors

Common errors & fixes

Error: Cannot find module 'metro-minify-swc'

Package not installed or not in node_modules.

fix

Run npm install --save-dev metro-minify-swc (or yarn/pnpm equivalent).

Error: Minifier path not found: metro-minify-swc

Metro cannot resolve the minifier module.

fix

Ensure the package is installed and check that metro.config.js uses the correct string for minifierPath.

TypeError: Cannot read properties of undefined (reading 'compress')

minifierConfig is undefined or not an object.

fix

Set minifierConfig to an empty object or a proper configuration object.

Upgrade

Version history

1.0.0-alphalatest on npm

Audit

Dependencies

metrorequiredpeer dependency - required to be installed as the bundler that this minifier plugs into

Agent activity

22 hits · last 30 days

node

OpenAI (training)

Resources

packagehttps://www.npmjs.com/package/metro-minify-swc ↗