HTMX

Frontend & Mobile

</> htmx - high power tools for HTML

Latest: v4.0.019 releases3 breaking changes1 common errorsUpdated Aug 28, 2026View on GitHub

Release History

View all versions →

v4.0.0Breaking31 fixes24 features

Aug 28, 2026

This release introduces significant new features like ETags support, a Websocket extension, and advanced `hx-boost` overrides, alongside numerous bug fixes and improvements to existing functionalities like Morph and SSE handling. Several internal refactors, such as moving the tokenizer and extracting the SSE extension, may require migration steps for existing extensions.

v4.0.0-beta6Breaking4 fixes9 features

Jul 23, 2026

This release introduces a new `hx-multipart` extension, history scroll restoration, and support for custom request methods. It also includes performance improvements for `hx-live` and a breaking change in event naming.

v2.0.10

v2.0.9

v2.0.711 fixes12 features

Sep 11, 2025

htmx v2.0.7 includes numerous bug fixes, documentation updates, new webring entries, and adds the reportValidity feature along with updated Rust examples.

v2.0.61 fix1 feature

Jun 27, 2025

htmx v2.0.6 adds a Lua Server Pages server example and fixes click‑event handling on elements wrapped by links.

v2.0.5Breaking10 fixes6 features

Jun 20, 2025

The release adds new hx-drag and historyRestoreAsHxRequest features, expands documentation and examples, removes legacy IE support, and includes numerous bug fixes and documentation improvements.

Common Errors

MissingServletRequestParameterException1 report

MissingServletRequestParameterException in HTMX usually arises when a server-side handler expects a specific request parameter, but the HTMX request doesn't include it, often after a form submission. Ensure that the `name` attribute of your input elements (or other form controls) matches the parameter names expected by your server-side code, and that any relevant fields or URL parameters are, indeed, sent in the request. Double-check also that any hx-params are being sent either through the attribute or a script.