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htmx 4.0.0 released with explicit attribute inheritance and fetch() migration

htmx.org 8 hours ago 7 min read ↗ Original

The htmx team announced version 4.0.0, introducing explicit attribute inheritance, standardized events, and a switch from XMLHttpRequest to fetch().

WHY IT MATTERS

Engineers will need to adjust markup that relied on implicit attribute inheritance and update event listeners to the new naming scheme. The removal of localStorage-based history caching reduces edge-case bugs but may affect applications that depended on that behavior.

Written by elseif from the cluster below · every claim links back to a source

The three things worth knowing

Attributes are no longer inherited by default; developers must add ":inherited" to opt-in.

All htmx events now follow a standardized "htmx:phase:action" pattern, removing legacy event names.

History handling no longer uses localStorage by default, fetching pages on back navigation instead.

THE CLUSTER

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htmx.org via Lobsters htmx 4.0.0 has been released 10 hours Open ↗

htmx.org via Hacker News Htmx 4.0.0 has been released 8 hours Open ↗