tonsky/rum

Health v2 · maintenance only

Adoption not part of the score

1827 stars · 127 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Rum is a simple, decomplected, isomorphic HTML UI library for Clojure and ClojureScript. On the client it works as a thin React wrapper, while on the server (JVM Clojure) it functions as a static HTML generator, supporting server-side rendering with no enforced state model.

Use cases

• build a web UI in ClojureScript
• React wrapper for ClojureScript components
• generate static HTML from Clojure on the server
• server-side render the same components used client-side
• reactive UI components driven by atoms without a dictated state model
• lightweight alternative to Reagent or Om
• mix custom behaviors into components via mixins

When to choose

• You want a minimal, React-based UI layer for ClojureScript without adopting an opinionated state management model
• You need isomorphic rendering - the same components producing HTML on the JVM server and hydrating in the browser
• You value a tiny (~900 line) codebase you can read end-to-end and extend through its stable internal API
• You want to combine it with other state libraries like DataScript, atoms, or plain JavaScript objects

When to avoid

• You need a batteries-included framework with routing, state management, and build tooling bundled in
• You require active development and new features - the project is explicitly in support mode with no new development
• You are not working in Clojure or ClojureScript
• You expect framework-level guarantees or long-term multi-maintainer stewardship

Facets

library · maturity maintenance

frontend-framework ui-components ssr templating web-development frontend browser jvm clojure clojurescript react-wrapper isomorphic reactive mixins atoms no-enforced-state-model static-html-generation support-mode web-server

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