Dead swipe detection for touch devices; fetch patch hardened

1.404.0

Minor Changes

• #4149 607bf54 Thanks @pauldambra! - Add dead swipe detection to dead clicks autocapture. When dead clicks autocapture is enabled, touch swipe gestures that produce no observable screen change (no scroll, mutation, selection or visibility change) are now captured as $dead_swipe events, surfacing failed navigations on touch devices. Configurable via capture_dead_swipes (default true) and swipe_threshold_px (default 30) on the capture_dead_clicks config. Swipes over surfaces whose response cannot be observed (canvas, video and other media elements under the finger) are skipped, and captures are limited per page load via max_dead_swipes_per_page_load (default 10). (2026-07-16)

Patch Changes

• #4171 df17ddc Thanks @posthog! - Catch synchronous throws from a monkey-patched window.fetch so they no longer escape as unhandled exceptions. A synchronous throw is now routed through the same handling as an async rejection, so the request queue retries instead of the error leaking into error tracking. (2026-07-16)
• Updated dependencies [607bf54]:
  • @posthog/types@1.397.0