Re-subscribe listeners after a back-forward cache restore - #152
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WebKit reuses the document on a bfcache restore without re-running the page's scripts, so median://events/subscribe is never re-sent and every listener on the page goes dead. Re-subscribe on pageshow with persisted.
kevzbldai
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July 30, 2026 00:37
kevzbldai
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Jul 30, 2026
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When iOS clears event subscriptions on
didCommitNavigation, a back-forward restore that reuses the document re-clears them - but the page's scripts don't re-run, so nothing callsaddListeneragain, and every listener on the page dies silently.pageshowwithpersisted: trueis the one signal that fires on a bfcache restore. On it, re-sendmedian://events/subscribefor every event name that still has a registered callback.