rollup-plugin-auto-transform

1.0.2 verified Mon Apr 27 auth: no javascript maintenance

An automatic transform plugin for Rollup that mimics Browserify's transform resolution by reading the `browserify.transform` key in package.json. As of version 1.0.2 (stable, single release), it simplifies applying Browserify transforms (e.g., brfs, envify) to Rollup bundles without manual configuration. Unlike manual plugin arrays, it reads transforms from package.json automatically, reducing setup duplication. No active development since 2017; considered feature-complete for its narrow use case. Alternative: use Rollup plugins directly or @rollup/plugin-commonjs for broader compatibility.

Common errors

error Cannot find module 'rollup-plugin-auto-transform' ↓

cause Package not installed or import path incorrect.

fix

Run npm install rollup-plugin-auto-transform and ensure import is correct: import autoTransform from 'rollup-plugin-auto-transform'

error TypeError: autoTransform is not a function ↓

cause Using named import instead of default import.

fix

Use default import: import autoTransform from 'rollup-plugin-auto-transform' instead of import { autoTransform } from...

error Error: Could not resolve 'your-transform' from .../ ↓

cause Transform package not installed but listed in package.json.

fix

Install the transform package (e.g., npm install brfs) or remove it from 'browserify.transform'.

Warnings

deprecated Package is no longer actively maintained; last release in 2017. ↓

fix Consider using direct Rollup plugins (e.g., @rollup/plugin-commonjs, rollup-plugin-babel) or @rollup/plugin-node-resolve for better compatibility.

gotcha Transforms must be listed under 'browserify.transform' in package.json; other keys are ignored. ↓

fix Ensure your package.json has a 'browserify.transform' array. Example: { "browserify": { "transform": ["brfs"] } }

gotcha Transforms are applied globally, not per-file; may cause unexpected behavior with non-Browserify transforms. ↓

fix Review each transform's compatibility with Rollup. Some Browserify transforms rely on Node.js streams or other Browserify internals.

Install

npm install rollup-plugin-auto-transform

yarn add rollup-plugin-auto-transform

pnpm add rollup-plugin-auto-transform

Imports

default

wrong

const { autoTransform } = require('rollup-plugin-auto-transform')

correct

import autoTransform from 'rollup-plugin-auto-transform'

The package exports a single function as default. Named export is incorrect.

autoTransform (named import attempt)

wrong

import { autoTransform } from 'rollup-plugin-auto-transform'

correct

import autoTransform from 'rollup-plugin-auto-transform'

Only default export exists; named import will be undefined.

CommonJS require

wrong

const { default: autoTransform } = require('rollup-plugin-auto-transform')

correct

const autoTransform = require('rollup-plugin-auto-transform')

In CJS, require returns the default export directly.

TypeScript import
```
import autoTransform from 'rollup-plugin-auto-transform'
```
No type definitions are bundled; use @types or inline type if needed.

Quickstart

Shows how to use the plugin to automatically apply Browserify transforms defined in package.json to a Rollup bundle.

import autoTransform from 'rollup-plugin-auto-transform';
import { rollup } from 'rollup';

const bundle = await rollup({
  input: 'src/index.js',
  plugins: [
    autoTransform()
  ]
});

const { output } = await bundle.generate({ format: 'esm' });
console.log(output[0].code);