htmx 2.0.0-alpha1 has been released!

htmx 2.0.0-alpha1 Release

I’m happy to announce the first alpha release of htmx 2.0

This is an alpha release and should NOT be considered ready for production. We are releasing it to begin testing the code against real world scenarios to figure out what is broken and what needs improvement.

If you are able to do so, please switch to the release and do a quick run through any htmx-powered functionality you have and let us know if there are issues.

Of particular concern to us are the following changes:

A complete upgrade guide can be found here:

htmx 1.x -> 2.x Migration Guide

Note that htmx 2.x will no longer be IE compatible, but 1.x will continue to be supported for IE users.


The alpha can be installed via a package manager referencing version 2.0.0-alpha1, or can be linked via a CDN:

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or Downloaded


Extensions have been removed from the main codebase and are now in this github repo:

They will eventually be available at and in NPM but for now must be linked from the github repo.

There was one breaking change in the extensions, SSE, so you must use the newer version of that extension:

New Features