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readme.md
ansi-styles
ANSI escape codes for styling strings in the terminal
You probably want the higher-level chalk module for styling your strings.
Install
npm install ansi-styles
Usage
import styles from 'ansi-styles';
console.log(`${styles.green.open}Hello world!${styles.green.close}`);
// Color conversion between 256/truecolor
// NOTE: When converting from truecolor to 256 colors, the original color
// may be degraded to fit the new color palette. This means terminals
// that do not support 16 million colors will best-match the
// original color.
console.log(`${styles.color.ansi(styles.rgbToAnsi(199, 20, 250))}Hello World${styles.color.close}`)
console.log(`${styles.color.ansi256(styles.rgbToAnsi256(199, 20, 250))}Hello World${styles.color.close}`)
console.log(`${styles.color.ansi16m(...styles.hexToRgb('#abcdef'))}Hello World${styles.color.close}`)
API
open
and close
Each style has an open
and close
property.
modifierNames
, foregroundColorNames
, backgroundColorNames
, and colorNames
All supported style strings are exposed as an array of strings for convenience. colorNames
is the combination of foregroundColorNames
and backgroundColorNames
.
This can be useful if you need to validate input:
import {modifierNames, foregroundColorNames} from 'ansi-styles';
console.log(modifierNames.includes('bold'));
//=> true
console.log(foregroundColorNames.includes('pink'));
//=> false
Styles
Modifiers
reset
bold
dim
italic
(Not widely supported)underline
overline
Supported on VTE-based terminals, the GNOME terminal, mintty, and Git Bash.inverse
hidden
strikethrough
(Not widely supported)
Colors
black
red
green
yellow
blue
magenta
cyan
white
blackBright
(alias:gray
,grey
)redBright
greenBright
yellowBright
blueBright
magentaBright
cyanBright
whiteBright
Background colors
bgBlack
bgRed
bgGreen
bgYellow
bgBlue
bgMagenta
bgCyan
bgWhite
bgBlackBright
(alias:bgGray
,bgGrey
)bgRedBright
bgGreenBright
bgYellowBright
bgBlueBright
bgMagentaBright
bgCyanBright
bgWhiteBright
Advanced usage
By default, you get a map of styles, but the styles are also available as groups. They are non-enumerable so they don't show up unless you access them explicitly. This makes it easier to expose only a subset in a higher-level module.
styles.modifier
styles.color
styles.bgColor
Example
import styles from 'ansi-styles';
console.log(styles.color.green.open);
Raw escape codes (i.e. without the CSI escape prefix \u001B[
and render mode postfix m
) are available under styles.codes
, which returns a Map
with the open codes as keys and close codes as values.
Example
import styles from 'ansi-styles';
console.log(styles.codes.get(36));
//=> 39
16 / 256 / 16 million (TrueColor) support
ansi-styles
allows converting between various color formats and ANSI escapes, with support for 16, 256 and 16 million colors.
The following color spaces are supported:
rgb
hex
ansi256
ansi
To use these, call the associated conversion function with the intended output, for example:
import styles from 'ansi-styles';
styles.color.ansi(styles.rgbToAnsi(100, 200, 15)); // RGB to 16 color ansi foreground code
styles.bgColor.ansi(styles.hexToAnsi('#C0FFEE')); // HEX to 16 color ansi foreground code
styles.color.ansi256(styles.rgbToAnsi256(100, 200, 15)); // RGB to 256 color ansi foreground code
styles.bgColor.ansi256(styles.hexToAnsi256('#C0FFEE')); // HEX to 256 color ansi foreground code
styles.color.ansi16m(100, 200, 15); // RGB to 16 million color foreground code
styles.bgColor.ansi16m(...styles.hexToRgb('#C0FFEE')); // Hex (RGB) to 16 million color foreground code
Related
- ansi-escapes - ANSI escape codes for manipulating the terminal
Maintainers
For enterprise
Available as part of the Tidelift Subscription.
The maintainers of ansi-styles
and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.