@isaacs/cliui

Fork of cliui. Fully CommonJS/ESM hybridized, with all dependencies vendored and optimized for minimal bundle size without sacrificing functionality.

easily create complex multi-column command-line-interfaces.

Changes in v9

The default export is no longer exported. So, intead of import cliui from '@isaacs/cliui', you'll do import { cliui } from '@isaacs/cliui'. This is done in order to minimize typescript oddness between the CommonJS and ESM versions.

A minified export is provided at @isaacs/cliui/min. If you are concerned about bundle size, that's the thing to use.

Example

import { cliui } from '@isaacs/cliui'
// or: const { cliui } = require('cliui')
const ui = cliui()

ui.div('Usage: $0 [command] [options]')

ui.div({
  text: 'Options:',
  padding: [2, 0, 1, 0],
})

ui.div(
  {
    text: '-f, --file',
    width: 20,
    padding: [0, 4, 0, 4],
  },
  {
    text:
      'the file to load.' +
      chalk.green('(if this description is long it wraps).'),
    width: 20,
  },
  {
    text: chalk.red('[required]'),
    align: 'right',
  },
)

console.log(ui.toString())

Deno/ESM Support

Load the minified version from unpkg.

import { cliui } from 'https://unpkg.com/@isaacs/cliui/dist/esm/index.min.js'

const ui = cliui({})

ui.div('Usage: $0 [command] [options]')

ui.div({
  text: 'Options:',
  padding: [2, 0, 1, 0],
})

ui.div({
  text: '-f, --file',
  width: 20,
  padding: [0, 4, 0, 4],
})

console.log(ui.toString())

Layout DSL

cliui exposes a simple layout DSL:

If you create a single ui.div, passing a string rather than an object:

• \n: characters will be interpreted as new rows.
• \t: characters will be interpreted as new columns.
• \s: characters will be interpreted as padding.

as an example...

var ui = require('./')({
  width: 60,
})

ui.div(
  'Usage: node ./bin/foo.js\n' +
    '  <regex>\t  provide a regex\n' +
    '  <glob>\t  provide a glob\t [required]',
)

console.log(ui.toString())

will output:

Usage: node ./bin/foo.js
  <regex>  provide a regex
  <glob>   provide a glob          [required]

Methods

cliui = require('@isaacs/cliui')

cliui({width: integer})

Specify the maximum width of the UI being generated. 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.

cliui({wrap: boolean})

Enable or disable the wrapping of text in a column.

cliui.div(column, column, column)

Create a row with any number of columns, a column can either be a string, or an object with the following options:

• text: some text to place in the column.
• width: the width of a column.
• align: alignment, right or center.
• padding: [top, right, bottom, left].
• border: should a border be placed around the div?

cliui.span(column, column, column)

Similar to div, except the next row will be appended without a new line being created.

cliui.resetOutput()

Resets the UI elements of the current cliui instance, maintaining the values set for width and wrap.