HTMX

Use this skill for HTMX implementation and integration. Covers htmx 2.x (current stable) and htmx 4.x (beta). Reference files are annotated with [htmx 4], [htmx 4 change], and [htmx 4 removed] admonitions. Read only the reference file(s) needed for the task.

Quick Start

1. Identify the domain of the task (attributes, requests, swapping, events, patterns).
2. Open the matching file from references/.
3. Implement using HTML-first, hypermedia-driven patterns.
4. Validate that server responses return HTML fragments, not JSON.

Minimal example — a button that loads content via GET: