Registry / devops / rollup-plugin-prepack

rollup-plugin-prepack

library1.1.1jsnpmunverified

Rollup plugin that integrates Facebook Prepack (version 0.2.54+ peer dependency) to optimize JavaScript bundles at build time by running Prepack, a partial evaluator that produces smaller, faster code. Version 1.1.1 is the latest stable release; the project appears to be in maintenance mode with no recent commits. Key differentiator: enables ahead-of-time optimization via Prepack within the Rollup pipeline, unlike general minifiers.

devops

npm install rollup-plugin-prepack

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-PREP

rollup-plugin-prepack

devopsjavascriptv1.1.1

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

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

default (prepack)

✓ import prepack from 'rollup-plugin-prepack'

✗ const prepack = require('rollup-plugin-prepack')

The package exports a default function; named exports are not available. ESM import is preferred; require works but may cause issues with some bundlers.

prepack (as Rollup plugin)

✓ import prepack from 'rollup-plugin-prepack'

✗ import { prepack } from 'rollup-plugin-prepack'

Named import does not exist; always use default import. The function is used in the 'plugins' array of Rollup config.

PluginOptions

✓ import type { PluginOptions } from 'rollup-plugin-prepack'

TypeScript users can import the type for options; not available as named export from the main entry in older versions.

Shows how to configure and use the plugin in a Rollup config with Prepack options.

import prepack from 'rollup-plugin-prepack'; export default { input: 'src/index.js', output: { file: 'dist/optimized.js', format: 'cjs' }, plugins: [ prepack({ // Optional Prepack options timeout: 10000, mathRandomSeed: '0' }) ] };

Debug

Known issues

deprecatedFacebook Prepack is no longer actively maintained and may not work with modern JavaScript features.

fix

Consider alternative optimizers like Google Closure Compiler or esbuild-plugin-prepack.

affects: >=0.2.54

gotchaPrepack requires the input code to be compatible; it may throw errors for unsupported syntax (e.g., dynamic imports, eval).

fix

Ensure input code is compatible with Prepack's supported subset, or use babel plugin to transpile beforehand.

affects: >=0.2.54

breakingVersion 1.0.0 switched from CommonJS to ESM-only exports; require() will fail.

fix

Use import syntax or upgrade to Node 13+ with --experimental-modules (legacy).

affects: >=1.0.0

Errors

Common errors & fixes

Cannot find module 'rollup-plugin-prepack'

Package not installed or mismatched peer dependency prepack not found.

fix

Run npm install rollup-plugin-prepack prepack --save-dev

Error: Prepack failed with: ...

Prepack encountered unsupported syntax or errors in the input code.

fix

Check Prepack compatibility; validate input code with Prepack CLI standalone.

Upgrade

Version history

1.1.1latest on npm

Audit

Dependencies

prepackrequiredpeer dependency required to run the Prepack optimizer

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/tunnckoCore/rollup-plugin-prepack ↗

packagehttps://www.npmjs.com/package/rollup-plugin-prepack ↗