Workers - WebSocket binary messages now delivered as Blob by default
UpdateUnverifiedAdded Sep 24, 2026
Binary frames received on a WebSocket are now delivered to the message event as Blob ↗ objects by default. This matches the WebSocket specification ↗ and standard browser behavior. Previously, binary frames were always delivered as ArrayBuffer ↗ . The binaryType property on WebSocket controls the delivery type on a per-WebSocket basis.
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