Engineering Leadership InfoQ · 2026-09-18T09:32:00Z · 1 min read

htmx 4.0: a Fetch-Based Rewrite, Built-In Morphing Swaps, and Explicit Attribute Inheritance

htmx 4 has been released, featuring a transition from XMLHttpRequest to the fetch() API, enhancing streaming capabilities. Key updates include built-in morphing swaps for DOM state preservation and an hx-partial tag for cleaner updates. Attribute inheritance is now explicit, with event names standardized. The library maintains focus on minimal JavaScript while remaining popular among frameworks. By Daniel Curtis

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