rollup-plugin-protobuf

0.1.1 verified Mon Apr 27 auth: no javascript

A Rollup plugin that converts .proto files into JavaScript modules using protobuf.js. Version 0.1.1 (stable, no recent updates). It integrates protobuf compilation into the Rollup build pipeline, allowing direct import of .proto files. Differentiates by being Rollup-specific and supporting options like convertFieldsToCamelCase. No known alternatives for Rollup + protobuf.

Common errors

error Error: Cannot find module 'rollup-plugin-protobuf' ↓

cause Package not installed or missing from node_modules.

fix

Run: npm install --save-dev rollup-plugin-protobuf

Warnings

gotcha Proto file imports only export a default object; named imports will be undefined. ↓

fix Use default import: import messages from './messages.proto'

Install

npm install rollup-plugin-protobuf

yarn add rollup-plugin-protobuf

pnpm add rollup-plugin-protobuf

Imports

default

wrong

const protobuf = require('rollup-plugin-protobuf')

correct

import protobuf from 'rollup-plugin-protobuf'

ESM only; CommonJS require may fail without .default.

plugin usage

wrong

plugins: [ protobuf.default({ convertFieldsToCamelCase: true }) ]

correct

plugins: [ protobuf({ convertFieldsToCamelCase: true }) ]

Default export is directly callable; no .default needed.

import messages
wrong
```
import { messages } from './messages.proto'
```
correct
```
import messages from './messages.proto'
```
Proto files export a default object; named imports won't work.

Quickstart

Shows how to configure the plugin with convertFieldsToCamelCase option and import a .proto file.

import { rollup } from 'rollup';
import protobuf from 'rollup-plugin-protobuf';

async function build() {
  const bundle = await rollup({
    input: 'src/main.js',
    plugins: [
      protobuf({ convertFieldsToCamelCase: true })
    ]
  });
  await bundle.write({ file: 'dist/bundle.js', format: 'esm' });
}

build();