dictionary ReadableWritablePair {
    required ReadableStream readable;
    required WritableStream writable;
};

dictionary StreamPipeOptions {
    boolean preventClose = false;
    boolean preventAbort = false;
    boolean preventCancel = false;
    AbortSignal signal;
};

// https://streams.spec.whatwg.org/#enumdef-readablestreamreadermode
enum ReadableStreamReaderMode { "byob" };

// https://streams.spec.whatwg.org/#dictdef-readablestreamgetreaderoptions
dictionary ReadableStreamGetReaderOptions {
    ReadableStreamReaderMode mode;
};

// https://streams.spec.whatwg.org/#dictdef-readablestreamiteratoroptions
dictionary ReadableStreamIteratorOptions {
    boolean preventCancel = false;
};

// https://streams.spec.whatwg.org/#readablestream
[Exposed=*, Transferable, DefinesAsyncIteratorReturn]
interface ReadableStream {
    constructor(optional object underlyingSource, optional QueuingStrategy strategy = {});

    static ReadableStream from(any asyncIterable);

    readonly attribute boolean locked;

    Promise<undefined> cancel(optional any reason);
    ReadableStreamReader getReader(optional ReadableStreamGetReaderOptions options = {});
    ReadableStream pipeThrough(ReadableWritablePair transform, optional StreamPipeOptions options = {});
    Promise<undefined> pipeTo(WritableStream destination, optional StreamPipeOptions options = {});
    sequence<ReadableStream> tee();

    async iterable<any>(optional ReadableStreamIteratorOptions options = {});
};

typedef (ReadableStreamDefaultReader or ReadableStreamBYOBReader) ReadableStreamReader;
