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Is rollup-watch ESM-only? Can you require() it?

Watch files for changes and perform incremental rebuilds with Rollup

Last verified Sep 9, 2026 against rollup-watch@4.3.1. Markdown · JSON

CommonJS CommonJS — require() works on every Node.js version we test

rollup-watch ships CommonJS only. require("rollup-watch") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "rollup-watch" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

What to do

  1. require("rollup-watch") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import rollupWatch from "rollup-watch"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: no types are available for rollup-watch; declare the module yourself if you need them.
  4. This package is deprecated: rollup-watch functionality is now included in Rollup itself
Latest
4.3.1 (Jul 12, 2017)
Module format
CommonJS
Last CommonJS version
4.3.1
TypeScript types
None
Node engines
not declared
Weekly downloads
69K
License
MIT

Deprecated: rollup-watch functionality is now included in Rollup itself

Does rollup-watch@4.3.1 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("rollup-watch") from a CommonJS file and import "rollup-watch" from an ES module.

Runtimerequire("rollup-watch")import "rollup-watch"
Node.js 18✓ works✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4.0✓ works✓ works

How to import rollup-watch

ES modules (import)

import rollupWatch from "rollup-watch";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const rollupWatch = require("rollup-watch");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (18 versions; the newest 18 shown).

VersionsFormatFirst published
1.0.0 – 4.3.1CommonJSJun 8, 2016

Frequently asked

Is rollup-watch ESM-only?

rollup-watch@4.3.1 is a CommonJS package. rollup-watch ships CommonJS only. require("rollup-watch") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "rollup-watch" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import rollup-watch with ES module syntax?

Yes. import rollupWatch from "rollup-watch" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does rollup-watch work in Bun?

Yes. import "rollup-watch" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does rollup-watch ship TypeScript types?

No. rollup-watch ships no type declarations and there is no @types package for it.

Links

Other commonjs packages

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