PostHog/posthog-js @posthog/types@1.404.1

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1.404.1

Patch Changes

• #4503 eb05237 Thanks @pauldambra! - fix(dead-clicks): treat visibility and focus changes as liveness signals, not dead-click evidence

  The dead-click detector treated a visibilitychange as evidence a click was dead: it measured Math.abs(clickTimestamp - lastVisibilityChange) and, once that exceeded the threshold, timed the click out as dead. Because it only recorded the tab becoming visible, any click in a session where the tab had ever been backgrounded (median gap ~1 minute) was flagged.

  A visibility or focus change near a click is the opposite — a sign the click did something (it woke/focused the tab, opened a new tab, or opened a new window/popup) — so these signals now only ever suppress a dead click, never cause one:

  • Visibility changes are recorded in both directions (a click that opens a new tab sends the current tab to hidden), and a window focus/blur observer is added, since a click that opens a new window/popup may leave the tab visible and only surface as the current window losing focus.
  • A click within a wake-up/interaction window (1s, wide enough for a real "tab back, then click" gesture) of any such change is suppressed.
  • The visibility signal no longer feeds the dead-marking path at all. $dead_click_visibility_changed_timeout stays in the payload (always false) for shape compatibility, and a new $dead_click_focus_changed_delay_ms is emitted for observability.
  • Visibility/focus changes are now recorded onto each queued candidate the instant they fire (like scroll), instead of being read from a single shared timestamp when the click is checked ~1s later. A click that hides or blurs the tab (opening a new tab/window) suspends that check while the tab is backgrounded; by the time it resumes the tab has usually returned, and the shared timestamp would have been overwritten by that later transition — losing the click-correlated one and wrongly flagging the click dead. Stamping the candidate as the event fires makes delayed hide→show and blur→focus sequences suppress correctly. (2026-08-14)