rollup-esm-206

library2.0.6jsnpmunverified

Rollup is a module bundler for JavaScript that compiles small pieces of code into larger, optimized bundles using ES module format. Current stable version is v4.60.2, with active development and frequent releases. Rollup focuses on ES module tree-shaking and produces smaller, faster bundles compared to other bundlers. It supports plugins, multiple output formats (ESM, CJS, IIFE, UMD, AMD), and has both CLI and JavaScript API. Ships TypeScript types.

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npm install rollup-esm-206

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INSTALL

IMPORT

SIG · ROLLUP-ESM-206

rollup-esm-206

devopsjavascriptv2.0.6

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.

rollup

✓ import { rollup } from 'rollup'

✗ const rollup = require('rollup')

ESM-only since v3; named export, not default. Also available as `rollup` CLI command.

RollupOptions

✓ import type { RollupOptions } from 'rollup'

✗ import { RollupOptions } from 'rollup'

TypeScript type import; use `import type` to avoid runtime issues.

watch

✓ import { watch } from 'rollup'

✗ import watch from 'rollup'

Named export; watch is not a default export.

Basic Rollup configuration using ESM config file, bundling a single input to an ES module output.

// rollup.config.mjs export default { input: 'src/main.js', output: { file: 'bundle.js', format: 'esm' } }; // Terminal // rollup -c rollup.config.mjs

rollup --version

Debug

Known issues

breakingRollup v3 onwards requires Node.js >=14 and uses ESM-only API.

fix

Update to Node.js >=14. Use `import` instead of `require()` for rollup API.

affects: >=3.0.0

breakingRollup v4 drops support for Node.js 10 and 12.

fix

Use Node.js >=14.18.0 (or >=16 for some features).

affects: >=4.0.0

deprecatedReturning import attributes from `load` or `transform` hooks is deprecated in v4.57.0 and will be removed in v5.

fix

Use the separate `resolveImportAttributes` hook or attach attributes via module info.

affects: >=4.57.0 <5.0.0

gotchaWhen using `output.format: 'cjs'`, dynamic imports become `Promise.resolve(require(...))` which is synchronous; use `output.dynamicImportInCjs: false` to keep async behavior.

fix

Set `output.dynamicImportInCjs: 'false'` in rollup config.

affects: >=2.0.0

Errors

Common errors & fixes

Error: Cannot find module 'rollup'

Rollup is not installed or used in a non-ESM context.

fix

Run `npm install rollup` and ensure your project is configured for ESM (e.g., `"type": "module"` in package.json or use .mjs file extension).

SyntaxError: Unexpected token 'export'

Using ESM syntax in a CommonJS file without proper configuration.

fix

Rename config file to `rollup.config.mjs` or add `"type": "module"` to package.json.

(!) Plugin node-resolve: unable to resolve dependency ...

A dependency is missing from node_modules or not resolved by @rollup/plugin-node-resolve.

fix

Install the missing dependency and ensure it is listed in package.json. Also check if the plugin is configured correctly.

TypeError: Cannot destructure property 'rollup' of ... as it is undefined.

Incorrect import pattern when using CommonJS require with ESM-only versions of rollup.

fix

Use `const { rollup } = await import('rollup')` or switch to ESM imports.

Upgrade

Version history

2.0.6latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/rollup/rollup ↗

packagehttps://www.npmjs.com/package/rollup-esm-206 ↗

homepagehttps://rollupjs.org ↗