HTMX 4.0 enters beta, transitioning its underlying AJAX implementation to the fetch API and integrating DOM morphing and streaming responses.

// 2h agoOPENSOURCE RELEASE

HTMX 4.0 enters beta, transitioning its underlying AJAX implementation to the fetch API and integrating DOM morphing and streaming responses.

HTMX has released the beta for version 4.0, which features a major architectural shift by replacing its legacy AJAX implementation with the modern fetch API. This update also integrates native DOM morphing and support for streaming responses, allowing developers to create highly interactive user interfaces using lightweight HTML attributes rather than complex client-side JavaScript frameworks.

// ANALYSIS

Transitioning to the fetch API modernizes HTMX for the next era of web development, proving that server-driven HTML can keep pace with SPA frameworks while maintaining a fraction of the complexity.

–Moving from XHR to fetch is a necessary step that aligns HTMX with modern browser standards and facilitates response streaming.
–Built-in DOM morphing simplifies the setup process by eliminating the need for external morphing extensions.
–The updates keep HTMX highly competitive against heavy frameworks like React, especially for HTML-first developers.

// TAGS

htmxjavascriptweb-developmentfrontendfetch-apiopen-source

DISCOVERED

2h ago

2026-07-05

PUBLISHED

2h ago

2026-07-05

RELEVANCE

6/ 10

AUTHOR

DIY Smart Code

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HTMX 4.0 enters beta, transitioning its underlying AJAX implementation to the fetch API and integrating DOM morphing and streaming responses.