A reference to stderr which can be used to write directly to stderr.
It implements the Deno specific
Writer,
WriterSync,
and Closer interfaces as well as provides a
WritableStream interface.
These are low level constructs, and the console interface is a
more straight forward way to interact with stdout and stderr.
writable: WritableStream<Uint8Array>
A writable stream interface to stderr.
write(p: Uint8Array): Promise<number>
Write the contents of the array buffer (p) to stderr.
Resolves to the number of bytes written.
It is not guaranteed that the full buffer will be written in a single call.
const encoder = new TextEncoder();
const data = encoder.encode("Hello world");
const bytesWritten = await Deno.stderr.write(data); // 11
writeSync(p: Uint8Array): number
Synchronously write the contents of the array buffer (p) to stderr.
Returns the number of bytes written.
It is not guaranteed that the full buffer will be written in a single call.
const encoder = new TextEncoder();
const data = encoder.encode("Hello world");
const bytesWritten = Deno.stderr.writeSync(data); // 11
close(): void
Closes stderr, freeing the resource.
Deno.stderr.close();
isTerminal(): boolean
Checks if stderr is a TTY (terminal).
// This example is system and context specific
Deno.stderr.isTerminal(); // true