function

stream.default.isReadable

function isReadable(

stream: ReadableStream | ReadableStream<any>

): null | boolean;

Returns whether the stream is readable.

@returns

Only returns null if stream is not a valid Readable, Duplex or ReadableStream.

Referenced types

interface ReadableStream<R = any>

readonly locked: boolean
cancel(
reason?: any
): Promise<void>;
getReader(
options: { mode: 'byob' }
): ReadableStreamBYOBReader;
getReader(): ReadableStreamDefaultReader<R>;
getReader(
options?: ReadableStreamGetReaderOptions
): ReadableStreamReader<R>;
pipeThrough<T>(
transform: ReadableWritablePair<T, R>,
options?: StreamPipeOptions
): ReadableStream<T>;
pipeTo(
destination: WritableStream<R>,
options?: StreamPipeOptions
): Promise<void>;
tee(): [ReadableStream<R>, ReadableStream<R>];
values(
options?: ReadableStreamIteratorOptions
): ReadableStreamAsyncIterator<R>;