| 1 | # cliui
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| 2 |
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| 3 | [](https://travis-ci.org/yargs/cliui)
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| 4 | [](https://coveralls.io/r/yargs/cliui?branch=)
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| 5 | [](https://www.npmjs.com/package/cliui)
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| 6 | [](https://github.com/conventional-changelog/standard-version)
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| 7 |
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| 8 | easily create complex multi-column command-line-interfaces.
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| 9 |
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| 10 | ## Example
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| 11 |
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| 12 | ```js
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| 13 | var ui = require('cliui')()
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| 14 |
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| 15 | ui.div('Usage: $0 [command] [options]')
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| 16 |
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| 17 | ui.div({
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| 18 | text: 'Options:',
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| 19 | padding: [2, 0, 2, 0]
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| 20 | })
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| 21 |
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| 22 | ui.div(
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| 23 | {
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| 24 | text: "-f, --file",
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| 25 | width: 20,
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| 26 | padding: [0, 4, 0, 4]
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| 27 | },
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| 28 | {
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| 29 | text: "the file to load." +
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| 30 | chalk.green("(if this description is long it wraps).")
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| 31 | ,
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| 32 | width: 20
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| 33 | },
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| 34 | {
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| 35 | text: chalk.red("[required]"),
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| 36 | align: 'right'
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| 37 | }
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| 38 | )
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| 39 |
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| 40 | console.log(ui.toString())
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| 41 | ```
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| 42 |
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| 43 | <img width="500" src="screenshot.png">
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| 44 |
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| 45 | ## Layout DSL
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| 46 |
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| 47 | cliui exposes a simple layout DSL:
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| 48 |
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| 49 | If you create a single `ui.div`, passing a string rather than an
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| 50 | object:
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| 51 |
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| 52 | * `\n`: characters will be interpreted as new rows.
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| 53 | * `\t`: characters will be interpreted as new columns.
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| 54 | * `\s`: characters will be interpreted as padding.
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| 55 |
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| 56 | **as an example...**
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| 57 |
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| 58 | ```js
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| 59 | var ui = require('./')({
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| 60 | width: 60
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| 61 | })
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| 62 |
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| 63 | ui.div(
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| 64 | 'Usage: node ./bin/foo.js\n' +
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| 65 | ' <regex>\t provide a regex\n' +
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| 66 | ' <glob>\t provide a glob\t [required]'
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| 67 | )
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| 68 |
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| 69 | console.log(ui.toString())
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| 70 | ```
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| 71 |
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| 72 | **will output:**
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| 73 |
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| 74 | ```shell
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| 75 | Usage: node ./bin/foo.js
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| 76 | <regex> provide a regex
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| 77 | <glob> provide a glob [required]
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| 78 | ```
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| 79 |
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| 80 | ## Methods
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| 81 |
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| 82 | ```js
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| 83 | cliui = require('cliui')
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| 84 | ```
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| 85 |
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| 86 | ### cliui({width: integer})
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| 87 |
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| 88 | Specify the maximum width of the UI being generated.
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| 89 | If no width is provided, cliui will try to get the current window's width and use it, and if that doesn't work, width will be set to `80`.
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| 90 |
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| 91 | ### cliui({wrap: boolean})
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| 92 |
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| 93 | Enable or disable the wrapping of text in a column.
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| 94 |
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| 95 | ### cliui.div(column, column, column)
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| 96 |
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| 97 | Create a row with any number of columns, a column
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| 98 | can either be a string, or an object with the following
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| 99 | options:
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| 100 |
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| 101 | * **text:** some text to place in the column.
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| 102 | * **width:** the width of a column.
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| 103 | * **align:** alignment, `right` or `center`.
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| 104 | * **padding:** `[top, right, bottom, left]`.
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| 105 | * **border:** should a border be placed around the div?
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| 106 |
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| 107 | ### cliui.span(column, column, column)
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| 108 |
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| 109 | Similar to `div`, except the next row will be appended without
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| 110 | a new line being created.
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| 111 |
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| 112 | ### cliui.resetOutput()
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| 113 |
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| 114 | Resets the UI elements of the current cliui instance, maintaining the values
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| 115 | set for `width` and `wrap`.
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