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# byobRequest

The **`byobRequest`** read-only property of the `ReadableByteStreamController` interface returns the current BYOB request, or `null` if there are no pending requests.

An underlying byte source should check this property, and use it to write data to the stream if it exists (rather than using `ReadableByteStreamController.enqueue()`).
This will result in an efficient zero-byte transfer of the data to the consumer.

## Value

A `ReadableStreamBYOBRequest` object instance, or `null`.
