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kleur.d.ts	React files	2020-12-21 10:29:31 -05:00
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package.json	simulator page updates	2020-12-22 09:59:14 -05:00
readme.md	React files	2020-12-21 10:29:31 -05:00

readme.md

The fastest Node.js library for formatting terminal text with ANSI colors~!

Features

No dependencies
Super lightweight & performant
Supports nested & chained colors
No String.prototype modifications
Conditional color support
Familiar API

Originally inspired by ansi-colors. See Credits for more info!

Install

$ npm install --save kleur

Usage

const kleur = require('kleur');

// basic usage
kleur.red('red text');

// chained methods
kleur.blue.bold.underline('howdy partner');

// nested methods
kleur.bold(`${ kleur.bgRed.white('[ERROR]') } ${ kleur.red.italic('Something happened')}`);

Chained Methods

console.log(kleur.bold.red('this is a bold red message'));
console.log(kleur.bold.italic('this is a bold italicized message'));
console.log(kleur.bold.yellow.bgRed.italic('this is a bold yellow italicized message'));
console.log(kleur.green.bold.underline('this is a bold green underlined message'));

Nested Methods

const { yellow, red, cyan } = require('kleur');

console.log(yellow(`foo ${red.bold('red')} bar ${cyan('cyan')} baz`));
console.log(yellow('foo ' + red.bold('red') + ' bar ' + cyan('cyan') + ' baz'));

Conditional Support

Toggle color support as needed; kleur assumes it's always enabled.

const kleur = require('kleur');

// manually disable
kleur.enabled = false;

// or use a library to detect support
kleur.enabled = require('color-support').level;

console.log(kleur.red('I will only be colored red if the terminal supports colors'));

API

Any kleur method returns a String (when invoked, not chained). It's up to the developer to pass the output to destinations like console.log, process.stdout.write, etc.

The methods below are grouped by type for legibility purposes only. They each can be chained or nested with one another.

Colors:

black — red — green — yellow — blue — magenta — cyan — white — gray

Backgrounds:

bgBlack — bgRed — bgGreen — bgYellow — bgBlue — bgMagenta — bgCyan — bgWhite

Modifiers:

reset — bold — dim — italic* — underline — inverse — hidden — strikethrough*

^{* Not widely supported}

Benchmarks

Using Node v8.9.0

Load time

chalk: 9.372ms
turbocolor: 0.526ms
ansi-colors: 0.851ms
kleur: 0.862ms

Performance

# All Colors
  ansi-colors x 60,485 ops/sec ±0.63% (96 runs sampled)
  chalk x 7,184 ops/sec ±3.77% (68 runs sampled)
  turbocolor x 95,468 ops/sec ±0.60% (94 runs sampled))
  kleur x 151,365 ops/sec ±0.22% (95 runs sampled)

# Stacked colors
  ansi-colors x 13,754 ops/sec ±0.44% (93 runs sampled)
  chalk x 1,732 ops/sec ±3.76% (71 runs sampled)
  turbocolor x 28,709 ops/sec ±1.32% (92 runs sampled)
  kleur x 30,837 ops/sec ±0.13% (93 runs sampled)

# Nested colors
  ansi-colors x 28,898 ops/sec ±0.32% (96 runs sampled)
  chalk x 3,389 ops/sec ±4.03% (71 runs sampled)
  turbocolor x 48,034 ops/sec ±1.47% (99 runs sampled)
  kleur x 61,266 ops/sec ±0.33% (97 runs sampled)

Credits

This project was originally inspired by Brian Woodward's awesome ansi-colors project.

Unlike v1, the latest version(s) of kleur no longer supports:

printf-formatting
variadic function arguments
multiline text via \n or \r
kleur.clear() method

In addition, kleur continues to be ship without symbols and bright color variants.

If you need any of these features, please use ansi-colors instead~!