Registry / devops / rollup-plugin-codegen

rollup-plugin-codegen

library2.1.0jsnpmunverified

A Rollup plugin for generating source code modules at bundle time. Current stable version is 2.1.0, released with fixes and support for Bun and Parcel loaders. This plugin allows dynamic generation of modules based on configuration, useful for injecting environment variables, version info, or computed code. Key differentiator: it integrates directly into Rollup's build process, avoiding separate pre-build steps. Ships TypeScript types, supports ESM and CJS outputs, requires Node >=16.0. Alternative to virtual modules or manual file writes.

devops http-networking data

npm install rollup-plugin-codegen

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-CODE

rollup-plugin-codegen

devopsjavascriptv2.1.0

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.

codegen

✓ import { codegen } from 'rollup-plugin-codegen'

✗ import codegen from 'rollup-plugin-codegen'

ESM-only since v2; named export, not default. TypeScript types included.

Plugin

✓ import type { Plugin } from 'rollup-plugin-codegen'

✗ const { Plugin } = require('rollup-plugin-codegen')

Type export for TypeScript users; not available in CJS.

CodegenOptions

✓ import type { CodegenOptions } from 'rollup-plugin-codegen'

Use this type for the options object parameter.

Shows how to configure codegen plugin to generate a module with environment variable.

import { codegen } from 'rollup-plugin-codegen'; import { defineConfig } from 'rollup'; export default defineConfig({ input: 'src/index.js', plugins: [ codegen({ modules: [ { id: 'src/env', code: `export const NODE_ENV = ${JSON.stringify(process.env.NODE_ENV ?? 'development')};` } ] }) ], output: { dir: 'dist', format: 'esm' } });

Debug

Known issues

breakingVersion 2.0.0 changed from default export to named export

fix

Use `import { codegen } from 'rollup-plugin-codegen'` instead of `import codegen from 'rollup-plugin-codegen'`

affects: >=2.0.0

breakingNode version requirement changed to >=16.0

fix

Upgrade Node.js to version 16 or later.

affects: >=2.0.0

gotchaGenerated module IDs must be relative and unique; duplicate IDs cause errors

fix

Ensure each module id is a unique relative path string (e.g., 'src/generated/env').

affects: all

Errors

Common errors & fixes

Error: The plugin 'codegen' does not export a default export.

Using default import instead of named import in ESM environment.

fix

Change `import codegen from 'rollup-plugin-codegen'` to `import { codegen } from 'rollup-plugin-codegen'`

Error: Cannot find module 'rollup-plugin-codegen'

Package not installed or not in node_modules.

fix

Run `npm install rollup-plugin-codegen` or `yarn add rollup-plugin-codegen`.

Error: The generated module 'src/env' could not be resolved.

The module ID path does not match Rollup's resolution or file system.

fix

Ensure the module id is a relative path that does not conflict with existing files. Use a path like 'src/generated/env' that doesn't exist on disk.

Upgrade

Version history

2.1.0latest on npm

Audit

Dependencies

rolluprequiredPeer dependency; requires Rollup version 2 or higher.

Agent activity

12 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/FlorianRappl/codegen-js ↗

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