Rollup

Spec sheet

Purpose

Rollup is a JavaScript module bundler that compiles smaller code modules into libraries or applications.Read 4 Oct 2026 · rollupjs.org

Integrations

The site says Vite pre-configures Rollup with defaults and plugins, and names WMR as a project that adopted its plugin API.Read 4 Oct 2026 · rollupjs.org

Security

The project asks users to report vulnerabilities through a private GitHub vulnerability report and recommends using the latest Rollup and official plugin versions.Read 4 Oct 2026 · github.com

Support

The Rollup site links to a chat channel and to Open Collective for project contributions.Read 4 Oct 2026 · rollupjs.org

License

Rollup is released under the MIT License.Read 4 Oct 2026 · rollupjs.org

Browser REPL

Rollup provides a browser REPL that accepts ES6 modules and offers output format choices including ES, AMD, CJS, IIFE, UMD, and System.Read 4 Oct 2026 · rollupjs.org

Browser use

The documentation includes a page for running Rollup in a browser, and the site links to an online REPL.Read 4 Oct 2026 · rollupjs.org

Code formats

Rollup can output formats including ES modules, CommonJS, UMD, AMD, IIFE, and SystemJS.Read 4 Oct 2026 · rollupjs.org

Code splitting

It can split code across entry points and dynamic imports using the output format’s import mechanism.Read 4 Oct 2026 · rollupjs.org

Compatibility

Rollup can import existing CommonJS modules through a plugin.Read 4 Oct 2026 · rollupjs.org

Configuration

Rollup configuration files are optional, and the documentation recommends them as a convenient way to configure advanced functionality.Read 4 Oct 2026 · rollupjs.org

Interfaces

Rollup can be used from a command line interface or through its JavaScript API.Read 4 Oct 2026 · rollupjs.org

Output formats

It supports output formats including ES modules, CommonJS, UMD, and SystemJS.Read 4 Oct 2026 · rollupjs.org

Plugins

Rollup provides a plugin API for code injections and transformations.Read 4 Oct 2026 · rollupjs.org

Security guidance

The security page recommends using the latest versions of Rollup and its official plugins.Read 4 Oct 2026 · github.com

Security reporting

The project asks vulnerability reporters to submit a private vulnerability report through GitHub Security.Read 4 Oct 2026 · github.com

Tree-shaking

Rollup statically analyzes imported code and excludes parts that are not used.Read 4 Oct 2026 · rollupjs.org

Use cases

The project describes Rollup as suitable for building libraries and applications, including builds targeting browsers and Node.js.Read 4 Oct 2026 · rollupjs.org

Where Specifiction places it

• JavaScript Build Tools#20 of 277.3