ref(browser)!: Drop Safari 14 support - remove navigationStart fallback and pagehide listeners - #21293
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msonnb merged 5 commits intoAug 4, 2026
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The Safari 14/pagehide removal is fine for v11, but the PR needs to clean up the stale tests.
At any case, this PR won't be merged at the moment until v11 is being prepared for release given its breaking changes nature.
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| const navigationStart = performance.timing?.navigationStart; | ||
| if (typeof navigationStart === 'number') { | ||
| const navigationStartDelta = Math.abs(navigationStart + performanceNow - dateNow); | ||
| if (navigationStartDelta < threshold) { | ||
| return navigationStart; | ||
| } | ||
| } |
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Some tests still assert the navigationStart. Those tests will fail.
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Thanks for the review @logaretm! You're right — the stale tests would have failed. I've pushed a follow-up commit that cleans everything up:
Understood on the v11 merge timing — happy for this to wait until the release prep begins. |
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logaretm
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Thanks for applying the changes, I will mark it as a draft to prevent merging it by mistake. |
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navigationStart fallback and pagehide listeners
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…rt fallback and pagehide listeners Safari 15+ has full performance.timeOrigin support and reliable visibilitychange events. This removes: - performance.timing?.navigationStart fallback in getBrowserTimeOrigin() - pagehide event listeners in web-vitals vendored code (onHidden, getVisibilityWatcher, whenIdleOrHidden) - isPageHidden() helper that checked for pagehide event type - Updated integration tests to use visibilitychange instead of pagehide This saves ~100 bytes of unnecessary browser compatibility code. Closes getsentry#18707
Addresses review feedback from @logaretm: - Remove test that asserted navigationStart fallback (code path removed) - Remove navigationStart stubs from remaining tests (no longer relevant) - Update test descriptions to reflect current behavior - Update replay fixture timeOrigin.mode from 'navigationStart' to 'timeOrigin' - Fix missing trailing newlines in all modified files
The Safari 14 support removal dropped the `pagehide` listener from the vendored web-vitals code, so the React/react-router SPA E2E apps that flushed the INP span by dispatching a bare `pagehide` event no longer triggered a flush and timed out. Switch them to the same `visibilitychange` pattern already used in the browser integration tests. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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This PR adds the external contributor to the CHANGELOG.md file, so that they are credited for their contribution. See #21293 Co-authored-by: msonnb <26038247+msonnb@users.noreply.github.com>
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Summary
Closes #18707
Drops Safari 14 compatibility code by removing the
performance.timing.navigationStartfallback andpagehideevent listeners from the vendored web-vitals code.Changes
Core timing (
packages/core/src/utils/time.ts):performance.timing?.navigationStartfallback ingetBrowserTimeOrigin()— Safari 15+ supportsperformance.timeOriginnativelyWeb-vitals vendored code (
packages/browser-utils/src/metrics/web-vitals/lib/):onHidden.ts: Removedpagehideevent listener, now only listens tovisibilitychangegetVisibilityWatcher.ts: Removedpagehideevent listener, removedisPageHidden()helper, simplifiedonVisibilityUpdateto only checkdocument.visibilityStatewhenIdleOrHidden.ts: Removedpagehideadd/remove listener pairsIntegration tests:
hidePage()helpers to dispatchvisibilitychange(withdocument.visibilityState = 'hidden') instead ofpagehidepagehidedispatches to use the same patternsentry.report_event: 'pagehide'data labels unchanged (backend-facing API contract)Bundle size impact
Saves ~100 bytes by removing unnecessary fallback code paths and event listeners.