Usage in Deno
```typescript import * as mod from "node:node__tty.d.ts"; ```The `node:tty` module provides the `tty.ReadStream` and `tty.WriteStream` classes. In most cases, it will not be necessary or possible to use this module
directly. However, it can be accessed using:
```js
import tty from 'node:tty';
```
When Node.js detects that it is being run with a text terminal ("TTY")
attached, `process.stdin` will, by default, be initialized as an instance of `tty.ReadStream` and both `process.stdout` and `process.stderr` will, by
default, be instances of `tty.WriteStream`. The preferred method of determining
whether Node.js is being run within a TTY context is to check that the value of
the `process.stdout.isTTY` property is `true`:
```console
$ node -p -e "Boolean(process.stdout.isTTY)"
true
$ node -p -e "Boolean(process.stdout.isTTY)" | cat
false
```
In most cases, there should be little to no reason for an application to
manually create instances of the `tty.ReadStream` and `tty.WriteStream` classes.
c
ReadStream
Represents the readable side of a TTY. In normal circumstances `process.stdin` will be the only `tty.ReadStream` instance in a Node.js
process and there should be no reason to create additional instances.
c
WriteStream
Represents the writable side of a TTY. In normal circumstances, `process.stdout` and `process.stderr` will be the only`tty.WriteStream` instances created for a Node.js process and there
should be no reason to create additional instances.
f
isatty
The `tty.isatty()` method returns `true` if the given `fd` is associated with
a TTY and `false` if it is not, including whenever `fd` is not a non-negative
integer.
T
Direction
-1 - to the left from cursor
0 - the entire line
1 - to the right from cursor