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Cross-Tab Synchronization Races in Single-Page Applications : Merge Correctness Under Concurrent Mutation
TypeScriptWeb Locks APIBroadcastChannelZustand
Problem Breakdown
The root defect is that mutation is allowed concurrently from multiple writers while correctness is deferred to a merge step that was never designed with domain semantics in mind. SPAs run multiple tabs against shared localStorage and BroadcastChannel state; tab A's in-flight optimistic mutation and tab B's concurrent…
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