About JSS
JSS is an authoring tool for CSS which allows you to use JavaScript to describe styles in a declarative, conflict-free and reusable way.
How many people use JSS
GitHub · npm- #45
Inertia.js8.1k
- #46
Elm7.9k
- #47
Stitches7.8k
- #48
JSS7.1k
- #49
Marionette.js7k - #50
Twitter Flight6.5k
- #51
Moon5.9k
#48 of 75 JavaScript frameworks we have counts for (of 82) · bars are GitHub stars across these neighbours; the category leader is React at 249k · as of September 7, 2026
Compare
#48 of 75 JavaScript frameworks
#47 of 75 JavaScript frameworks
The two numbers disagree - one leads on stars, the other on installs. Stars measure attention, downloads measure use.
Audit any site that runs JSS.
Enter a URL to score its stack for technology quality, version health, Lighthouse performance - and AI-readiness.
How we audit JSS
We measure the detected version against JSS's release history and grade the surrounding stack with a Lighthouse-grade quality audit. Weak or outdated links weigh more - one risky dependency can pull the whole score down.
How the score worksMore technologies in JavaScript frameworks
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