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Process.stderr - process - Node documentation
property Process.stderr

Usage in Deno

import { type Process } from "node:process";

The process.stderr property returns a stream connected tostderr (fd 2). It is a net.Socket (which is a Duplex stream) unless fd 2 refers to a file, in which case it is a Writable stream.

process.stderr differs from other Node.js streams in important ways. See note on process I/O for more information.

Type

WriteStream & { fd: 2; }