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