Underlying sink for WritableStream construction.

Fields

@:optionaloptionalwrite:Null<(Any, WritableStreamDefaultController) ‑> Any>

@:optionaloptionaltype:Null<Any>

@:optionaloptionalstart:Null<WritableStreamDefaultController ‑> Any>

@:optionaloptionalclose:Null<() ‑> Any>

@:optionaloptionalabort:Null<Any ‑> Any>