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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 Node v12 to v20. | |
| Includes TypeScript types. | |
| ## Usage | |
| ``` | |
| npm install --save cli-width | |
| ``` | |
| ```js | |
| 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`. | |