The fastest Node.js library for formatting terminal text with ANSI colors~!
## Features
* No dependencies
* Super [lightweight](#load-time) & [performant](#performance)
* Supports [nested](#nested-methods) & [chained](#chained-methods) colors
* No `String.prototype` modifications
* Conditional [color support](#conditional-support)
* Familiar [API](#api)
---
As of `v3.0` the Chalk-style syntax (magical getter) is no longer used.
If you need or require that syntax, consider using [`ansi-colors`](https://github.com/doowb/ansi-colors), which maintains `chalk` parity.
---
## Install
```
$ npm install --save kleur
```
## Usage
```js
const { red, white, blue, bold } = require('kleur');
// basic usage
red('red text');
// chained methods
blue().bold().underline('howdy partner');
// nested methods
bold(`${ white().bgRed('[ERROR]') } ${ red().italic('Something happened')}`);
```
### Chained Methods
```js
console.log(bold().red('this is a bold red message'));
console.log(bold().italic('this is a bold italicized message'));
console.log(bold().yellow().bgRed().italic('this is a bold yellow italicized message'));
console.log(green().bold().underline('this is a bold green underlined message'));
```
### Nested Methods
```js
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` includes simple auto-detection which may not cover all cases.
```js
const kleur = require('kleur');
// manually disable
kleur.enabled = false;
// or use another 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 with input; otherwise chaining is expected.
> 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](#chained-methods) or [nested](#nested-methods) with one another.
***Colors:***
> black — red — green — yellow — blue — magenta — cyan — white — gray — grey
***Backgrounds:***
> bgBlack — bgRed — bgGreen — bgYellow — bgBlue — bgMagenta — bgCyan — bgWhite
***Modifiers:***
> reset — bold — dim — italic* — underline — inverse — hidden — strikethrough*
* Not widely supported
## Benchmarks
> Using Node v10.13.0
### Load time
```
chalk :: 14.543ms
kleur :: 0.474ms
ansi-colors :: 1.923ms
```
### Performance
```
# All Colors
ansi-colors x 199,381 ops/sec ±1.04% (96 runs sampled)
chalk x 12,107 ops/sec ±2.07% (87 runs sampled)
kleur x 715,334 ops/sec ±0.30% (93 runs sampled)
# Stacked colors
ansi-colors x 24,494 ops/sec ±1.03% (93 runs sampled)
chalk x 2,650 ops/sec ±2.06% (85 runs sampled)
kleur x 75,798 ops/sec ±0.19% (97 runs sampled)
# Nested colors
ansi-colors x 77,766 ops/sec ±0.32% (94 runs sampled)
chalk x 5,596 ops/sec ±1.85% (86 runs sampled)
kleur x 137,660 ops/sec ±0.31% (93 runs sampled)
```
## Credits
This project originally forked [Brian Woodward](https://github.com/doowb)'s awesome [`ansi-colors`](https://github.com/doowb/ansi-colors) library.
Beginning with `kleur@3.0`, the Chalk-style syntax (magical getter) has been replaced with function calls per key:
```js
// Old:
c.red.bold.underline('old');
// New:
c.red().bold().underline('new');
```
> As I work more with Rust, the newer syntax feels so much better & more natural!
If you prefer the old syntax, you may migrate to `ansi-colors`. Versions below `kleur@3.0` have been deprecated.
## License
MIT © [Luke Edwards](https://lukeed.com)
