# StyleX, release history and use on real websites. A styling system from Meta used on Facebook and Instagram. Styles are written in JavaScript and compiled to atomic CSS at build time. - **Status:** Modern. Actively developed, open source since late 2023. - **Category:** [JS/CSS Frameworks](https://be1st.ai/technologies/framework) - **First release:** 2023 - **License:** MIT - **Latest version:** 0.19.1 (15 Sep 2026) - **Official website:** https://stylexjs.com - **Documentation:** https://stylexjs.com/docs/learn/ - **GitHub:** https://github.com/facebook/stylex - **Page:** https://be1st.ai/technologies/framework/stylex ## StyleX on audited websites None of the 16,845 websites audited by be1st runs StyleX so far. Tech Stack looks for it in every audit, so it shows up here as soon as a website with it is audited. ### Most used in JS/CSS Frameworks 1. [Tailwind CSS](https://be1st.ai/technologies/framework/tailwind-css): 34% (5,653) 2. [jQuery](https://be1st.ai/technologies/framework/jquery): 29% (4,883) 3. [Next.js](https://be1st.ai/technologies/framework/next-js): 23% (3,836) 4. [React](https://be1st.ai/technologies/framework/react): 22% (3,626) 5. [Bootstrap](https://be1st.ai/technologies/framework/bootstrap): 13% (2,198) 6. [PHP](https://be1st.ai/technologies/framework/php): 3.0% (502) 7. [Lit](https://be1st.ai/technologies/framework/lit): 2.9% (487) 8. [Astro](https://be1st.ai/technologies/framework/astro): 2.4% (405) 9. [Vue.js](https://be1st.ai/technologies/framework/vue-js): 2.2% (373) 10. [Alpine.js](https://be1st.ai/technologies/framework/alpine-js): 2.0% (341) The number for React counts only websites where Tech Stack detects it directly, not websites built with Next.js, Gatsby, and Remix, which run it too. The number for Vue.js counts only websites where Tech Stack detects it directly, not websites built with Nuxt, which run it too. ## StyleX versions and release history 17 release lines since 2023, as listed by the npm registry. The latest version is 0.19.1, released 15 Sep 2026. | Version | Released | Latest release | Releases | | --- | --- | --- | --- | | 0.19 | 16 Jun 2026 | 0.19.1 (15 Sep 2026) | 2 | | 0.18 | 4 Mar 2026 | 0.18.3 (20 Apr 2026) | 4 | | 0.17 | 18 Nov 2025 | 0.17.5 (13 Jan 2026) | 6 | | 0.16 | 26 Sep 2025 | 0.16.3 (27 Oct 2025) | 4 | | 0.15 | 1 Aug 2025 | 0.15.4 (8 Sep 2025) | 5 | | 0.14 | 30 Jun 2025 | 0.14.3 (22 Jul 2025) | 4 | | 0.13 | 19 May 2025 | 0.13.1 (22 May 2025) | 2 | | 0.12 | 11 Apr 2025 | 0.12.0 (11 Apr 2025) | 1 | | 0.11 | 28 Feb 2025 | 0.11.1 (3 Mar 2025) | 2 | | 0.10 | 2 Jan 2025 | 0.10.1 (18 Jan 2025) | 2 | | 0.9 | 1 Nov 2024 | 0.9.3 (1 Nov 2024) | 4 | | 0.8 | 7 Oct 2024 | 0.8.0 (7 Oct 2024) | 1 | | 0.7 | 25 Jun 2024 | 0.7.5 (30 Jun 2024) | 4 | | 0.6 | 16 Apr 2024 | 0.6.1 (23 Apr 2024) | 2 | | 0.5 | 26 Jan 2024 | 0.5.1 (26 Jan 2024) | 2 | | 0.4 | 29 Dec 2023 | 0.4.1 (29 Dec 2023) | 2 | | 0.3 | 5 Dec 2023 | 0.3.0 (5 Dec 2023) | 1 | Sources: [npm registry, package @stylexjs/stylex](https://www.npmjs.com/package/@stylexjs/stylex), checked 8 Nov 2026. ## Other technologies in JS/CSS Frameworks - [TanStack Start](https://be1st.ai/technologies/framework/tanstack-start): 1.9% of websites - [Nette](https://be1st.ai/technologies/framework/nette): 1.8% of websites - [Nuxt](https://be1st.ai/technologies/framework/nuxt): 1.5% of websites - [Angular](https://be1st.ai/technologies/framework/angular): 1.2% of websites - [Preact](https://be1st.ai/technologies/framework/preact): 1.2% of websites - [UnoCSS](https://be1st.ai/technologies/framework/unocss): 1.2% of websites - [Express](https://be1st.ai/technologies/framework/express): 1.1% of websites - [SvelteKit](https://be1st.ai/technologies/framework/sveltekit): 1.1% of websites - [ASP.NET](https://be1st.ai/technologies/framework/asp-net): 1.0% of websites - [Django](https://be1st.ai/technologies/framework/django): <1% of websites - [HTMX](https://be1st.ai/technologies/framework/htmx): <1% of websites - [Turbo (Hotwire)](https://be1st.ai/technologies/framework/turbo): <1% of websites [All 38 in JS/CSS Frameworks](https://be1st.ai/technologies/framework) ## Questions about StyleX ### What is StyleX? A styling system from Meta used on Facebook and Instagram. Styles are written in JavaScript and compiled to atomic CSS at build time. The be1st catalog lists StyleX under JS/CSS Frameworks. License of StyleX: MIT. ### What is the latest version of StyleX? The latest version of StyleX is 0.19.1, released 15 Sep 2026 (source: npm registry, package @stylexjs/stylex). ### How many websites use StyleX? None of the 16,845 websites audited by be1st runs StyleX yet, as of 8 Nov 2026. ### When was StyleX first released? StyleX was first released in 2023. ### Is StyleX still a modern choice? Yes. StyleX counts as a modern technology. Actively developed, open source since late 2023. ### What are the alternatives to StyleX? Technologies that do the same job as StyleX include vanilla-extract and Panda CSS. Numbers: latest audit of each of 16,845 websites audited by be1st, as of 8 Nov 2026.