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DerbyJS

MVC framework for realtime, collaborative web applications that run in Node.js and in browsers.

DerbyJS is built on a data synchronization engine, Racer, and renders the same templates in the browser and on the server. A project can hold one or more single-page apps, each with models, templates and routes, and the server side plugs into Express as router middleware. The documentation covers the framework, and the getting-started page lists Node.js and MongoDB as what a first app needs.

Worth knowing

The getting-started page calls the MongoDB adapter the most complete of the database adapters, and Redis is optional for scaling pub/sub beyond one server process. The install page gives an npm command only for the derby-examples repository, not for the framework package itself.

Identity

Status
Active
Maintainer
Nate Smith4

Rendering and deploy

Rendering
In the browser, On a server78
Install with
git clone of derby-examples, then npm install6

Releases

Current major version
45
Last release
2024-10-249

Adoption

GitHub stars
4,7002
npm downloads a week
2,17610
Contributors
4711
Dependent repositories
25212
Dependent packages
2912

Why these figures do not compare

Sources

  1. 2026-10-21: links, License model
    derbyjs.com
  2. 2026-10-21: links, Written in, GitHub stars
    api.github.com/repos/derbyjs/derby
  3. 2026-10-21: links
    derbyjs.github.io/derby/
  4. 2026-10-21: Maintainer, Categories
    github.com/derbyjs/derby/blob/master/README.md
  5. 2026-10-21: License, Current major version
    registry.npmjs.org/derby/latest
  6. 2026-10-21: Install with, Runtime, Databases
    derbyjs.com/started
  7. 2026-10-21: Rendering
    github.com/derbyjs/derby/blob/master/docs/apps.md
  8. 2026-10-21: Rendering
    github.com/derbyjs/derby/blob/master/docs/index.md
  9. 2026-10-21: Last release
    registry.npmjs.org/derby
  10. 2026-10-21: npm downloads a week
    api.npmjs.org/downloads/point/last-week/derby
  11. 2026-10-21: Contributors
    api.github.com/repos/derbyjs/derby/contributors?anon=true&per_page=100
  12. 2026-10-25: Dependent repositories, Dependent packages
    packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/derby

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