fix: handle skipped view transition ready rejection - #4044
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document.startViewTransition().ready rejects when the document is hidden. Catching only .finished left an unhandledrejection even though the swap still completed. Closes bigskysoftware#3989
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Sep 7, 2026
Before/after iframes against 7f9160f for PRs bigskysoftware#4043 bigskysoftware#4044 bigskysoftware#4045.
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Description
document.startViewTransition().readyrejects when the document is hidden. htmx only awaited.finished, so a skipped transition still completed the swap but emittedunhandledrejection(InvalidStateError).Corresponding issue: #3989
Demo: https://manwithacat.github.io/htmx/demos/view-transition-hidden/
Testing
New unit test mocks
startViewTransitionwith a rejectingreadyand asserts nounhandledrejection.Local
npm test(Chromium, same as CIhtmx_tests): 87 files, 1739 passed, 0 failed, 5 skipped.Checklist
four-dev