childprocess.stdin

child.stdin

A Writable Stream that represents the child process's stdin.

Note that if a child process waits to read all of its input, the child will not continue until this stream has been closed via end().

If the child was spawned with stdio[0] set to anything other than 'pipe', then this will be undefined.

child.stdin is an alias for child.stdio[0]. Both properties will refer to the same value.