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Programming language: JavaScript
License: MIT License
Tags: Ansi     Text     Command Line Utilities     Term     Terminal     CLI     Width     Shell     Limit     Slice     Ellipsis     Truncate    

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README

cli-truncate Build Status

Truncate a string to a specific width in the terminal

Gracefully handles ANSI escapes. Like a string styled with chalk. It also supports Unicode surrogate pairs and fullwidth characters.

Install

$ npm install cli-truncate

Usage

const cliTruncate = require('cli-truncate');

cliTruncate('unicorn', 4);
//=> 'uni…'

// Truncate at different positions
cliTruncate('unicorn', 4, {position: 'start'});
//=> '…orn'

cliTruncate('unicorn', 4, {position: 'middle'});
//=> 'un…n'

cliTruncate('unicorns rainbow dragons', 6, {position: 'end'})
//=> 'unico…'

cliTruncate('\u001B[31municorn\u001B[39m', 4);
//=> '\u001B[31muni\u001B[39m…'

// Truncate Unicode surrogate pairs
cliTruncate('uni\uD83C\uDE00corn', 5);
//=> 'uni\uD83C\uDE00…'

// Truncate fullwidth characters
cliTruncate('안녕하세요', 3);
//=> '안…'

// Truncate the paragraph to the terminal width
const paragraph = 'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa.';
cliTruncate(paragraph, process.stdout.columns));
//=> 'Lorem ipsum dolor sit amet, consectetuer adipiscing…'

API

cliTruncate(text, columns, options?)

text

Type: string

Text to truncate.

columns

Type: number

Columns to occupy in the terminal.

options

Type: object

position

Type: string Default: 'end' Values: 'start' 'middle' 'end'

Position to truncate the string.

space

Type: boolean Default: false

Add a space between the text and the ellipsis.

cliTruncate('unicorns', 5, {space: false});
//=> 'unic…'

cliTruncate('unicorns', 5, {space: true});
//=> 'uni …'

cliTruncate('unicorns', 6, {position: 'start', space: true});
//=> '… orns'

cliTruncate('unicorns', 7, {position: 'middle', space: true});
//=> 'uni … s'
preferTruncationOnSpace

Type: boolean Default: false

Truncate the string from a whitespace if it is within 3 characters from the actual breaking point.

cliTruncate('unicorns rainbow dragons', 20, {position: 'start', preferTruncationOnSpace: true})
//=> '…rainbow dragons'

// without preferTruncationOnSpace
cliTruncate('unicorns rainbow dragons', 20, {position: 'start'})
//=> '…rns rainbow dragons'

cliTruncate('unicorns rainbow dragons', 20, {position: 'middle', preferTruncationOnSpace: true})
//=> 'unicorns…dragons'

cliTruncate('unicorns rainbow dragons', 6, {position: 'end', preferTruncationOnSpace: true})
//=> 'unico…'

// preferTruncationOnSpace would have no effect if space isn't found within next 3 indexes
cliTruncate('unicorns rainbow dragons', 6, {position: 'middle', preferTruncationOnSpace: true})
//=> 'uni…ns'
  • wrap-ansi - Wordwrap a string with ANSI escape codes
  • slice-ansi - Slice a string with ANSI escape codes