Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Web Workers.
The WebTransportSendStream interface of the WebTransport API is a specialized WritableStream that is used to send outbound data in both unidirectional or bidirectional WebTransport streams.
The send stream is a writable stream of Uint8Array, that can be written to in order to send data to a server. It additionally provides streaming features such as setting the send order, and getting stream statistics.
Objects of this type are not constructed directly. When creating a unidirectional stream the WebTransport.createUnidirectionalStream() returns an object of this type for sending data. When creating a bidirectional stream using WebTransport.createBidirectionalStream(), the method returns a WebTransportBidirectionalStream, and the send stream object can be obtained from its writable property. When a bidirectional stream is initiated by the remote end, an object of this type can similarly be obtained using WebTransport.incomingBidirectionalStreams.
WebTransportSendStream is a transferable object.