TTY

When node detects that it is being run inside a TTY context, then process.stdin
will be a tty.ReadStream instance and process.stdout will be
a tty.WriteStream instance. The preferred way to check if node is being run in
a TTY context is to check process.stdout.isTTY:

Returns true or false depending on if the fd is associated with a
terminal.

Deprecated. Use
(i.e. process.stdin.setRawMode()) instead.

A Boolean that is initialized to false. It represents the current “raw” state
of the tty.ReadStream instance.

mode should be true or . This sets the properties of the
tty.ReadStream to act either as a raw device or default. isRaw will be set
to the resulting mode.

A net.Socket subclass that represents the writable portion of a tty. In normal
circumstances, process.stdout will be the only tty.WriteStream instance
ever created (and only when isatty(1) is true).

A Number that gives the number of rows the TTY currently has. This property
gets updated on “resize” events.

function () {}

Emitted by refreshSize() when either of the or rows properties
has changed.