Show HN: µJS, a 5KB alternative to Htmx and Turbo with zero dependencies
amaury_bouchard Saturday, March 07, 2026
I built µJS because I wanted AJAX navigation without the verbosity of HTMX or the overhead of Turbo.
It intercepts links and form submissions, fetches pages via AJAX, and swaps fragments of the DOM. Single <script> tag, one call to `mu.init()`. No build step, no dependencies.
Key features: patch mode (update multiple fragments in one request), SSE support, DOM morphing via idiomorph, View Transitions, prefetch on hover, polling, and full HTTP verb support on any element.
At ~5KB gzipped, it's smaller than HTMX (16KB) and Turbo (25KB), and works with any backend: PHP, Python, Go, Ruby, whatever.
Playground: https://mujs.org/playground
Comparison with HTMX and Turbo: https://mujs.org/comparison
About the project creation, why and when: https://mujs.org/about
GitHub: https://github.com/Digicreon/muJS
Happy to discuss the project.