jassy

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library 0.2.7 ·javascript maintenance
verified May 1, 2026

jassy is a runtime JavaScript-to-CSS transpiler that converts JS objects into CSS strings at runtime. Current stable version is 0.2.7, released with low cadence and marked as beta with an unstable API. It supports nested rules (like Sass/Less), auto-prefixing, media queries, mixins, and font-face declarations. Primarily designed for React projects with peer dependencies on React 0.14/15. Alternative to JSS or styled-components but with a simpler, object-based syntax; however, it is largely outdated and not maintained.

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