AI & Machine Learning

Playwright Multi‑Tab IndexedDB Sync: The Browser Context Isolation Trap (6 Hours of Debugging)

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A developer encountered issues with Playwright’s browser context isolation while testing multi-tab data synchronization using IndexedDB and BroadcastChannel. This isolation prevents messages from being received across different contexts, leading to failed test cases. To resolve this, tests must use a single BrowserContext for all pages to ensure shared storage and proper message delivery.

This highlights the importance of understanding Playwright’s context management when simulating multi-tab environments in automated testing.

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