tonsky/datascript

Health v2 · maintenance only

Adoption not part of the score

5784 stars · 318 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

DataScript is an immutable, in-memory database with a Datalog query engine for Clojure, ClojureScript, and JavaScript. It is designed to be cheap to create and ephemeral, serving as a lightweight state-management building block for client-side applications.

Use cases

• manage application state in the browser with an immutable database
• run Datalog queries against client-side data
• implement undo/redo by rewinding database state
• track evolving app state and sync with a server in the background
• replace hand-filtered arrays with indexed in-memory queries
• query structured data in ClojureScript single-page apps

When to avoid

• you need durable, persistent storage or a real server-side database
• you have large datasets where a full database engine's overhead is justified
• you are not working in Clojure, ClojureScript, or JavaScript
• you need SQL or multi-user concurrent write support

Facets

library · maturity stable

database search-engine state-management databases web-development frontend developer-tools jvm-scripting browser cross-platform datalog immutable-database in-memory-database clojurescript client-side-state persistent-data-structures nodejs

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