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Security: In modern browsers, access between different origins (domains) can be restricted by the CORS policy. Performance: The loop may execute several times, but typically the window hierarchy is not deep. Edge case: If the container is not found in any window, the topmost window will be returned.
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Security: In modern browsers, access between different origins (domains) can be restricted by the CORS policy.
Performance: The loop may execute several times, but typically the window hierarchy is not deep.
Edge case: If the container is not found in any window, the topmost window will be returned.