Cross-Origin-Opener-Policy (COOP) Header

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About

The HTTP Cross-Origin-Opener-Policy (COOP) response header allows a website to control whether a new top-level document , opening using Window.open() or by navigating to a new page , is opened in the same browsing context group (BCG) or in a new browsing context group1.

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References

  1. MDN. “Cross-Origin-Opener-Policy (COOP) header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Cross-Origin-Opener-Policy . (Accessed: [2025-05-19 Mon 16:41]). ↩︎

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