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# cli-width
Get stdout window width, with four fallbacks, `tty`, `output.columns`, a custom environment variable and then a default.
[](http://badge.fury.io/js/cli-width) [](https://travis-ci.org/knownasilya/cli-width) [](https://coveralls.io/github/knownasilya/cli-width?branch=master)
Tested against NodeJS v10+
## Usage
``` npm install --save cli-width ```
```js "use strict";
const cliWidth = require("cli-width");
cliWidth(); // maybe 204 :) ```
You can also set the `CLI_WIDTH` environment variable.
If none of the methods are supported, and the environment variable isn't set, the default width value is going to be `0`, that can be changed using the configurable `options`.
## API
### cliWidth([options])
`cliWidth` can be configured using an `options` parameter, the possible properties are:
- **defaultWidth**\<number\> Defines a default value to be used if none of the methods are available, defaults to `0` - **output**\<object\> A stream to be used to read width values from, defaults to `process.stdout` - **tty**\<object\> TTY module to try to read width from as a fallback, defaults to `require('tty')`
### Examples
Defining both a default width value and a stream output to try to read from:
```js const cliWidth = require("cli-width"); const ttys = require("ttys");
cliWidth({ defaultWidth: 80, output: ttys.output, }); ```
Defines a different tty module to read width from:
```js const cliWidth = require("cli-width"); const ttys = require("ttys");
cliWidth({ tty: ttys, }); ```
## Tests
```bash npm install npm test ```
Coverage can be generated with `npm run coverage`.
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