ansi-colors
Advanced tools
The ansi-colors npm package is a utility for styling strings in the terminal with ANSI escape codes. It allows developers to add color and style to text output in command-line applications.
Text Colors
Apply text color to strings. The example shows how to make text red.
"const colors = require('ansi-colors');\nconsole.log(colors.red('This is red text'));"Background Colors
Apply background color to strings. The example shows how to give text a red background.
"const colors = require('ansi-colors');\nconsole.log(colors.bgRed('This has a red background'));"Text Styles
Apply text styles like bold, italic, underline, etc. The example shows how to make text bold.
"const colors = require('ansi-colors');\nconsole.log(colors.bold('This is bold text'));"Chaining Styles
Chain multiple styles together. The example shows text that is blue, bold, and underlined.
"const colors = require('ansi-colors');\nconsole.log(colors.blue.bold.underline('This is blue, bold, and underlined'));"Custom Themes
Create custom themes by combining styles. The example defines a custom theme with styles for error and warning messages.
"const colors = require('ansi-colors');\nconst customTheme = {\n error: colors.red.bold,\n warning: colors.yellow.italic\n};\nconsole.log(customTheme.error('Error message'));\nconsole.log(customTheme.warning('Warning message'));"Chalk is a popular package similar to ansi-colors that provides a chainable API for styling strings. It offers a more extensive API and additional features like template literal support.
Kleur is a lightweight alternative to ansi-colors, focusing on performance. It has a similar API but does not support older versions of Node.js.
Colorette is another lightweight package for coloring terminal text. It aims to be fast and simple, with a minimalistic API compared to ansi-colors.
Collection of ansi colors and styles.
Please consider following this project's author, Brian Woodward, and consider starring the project to show your :heart: and support.
Install with npm:
$ npm install --save ansi-colors
ansi-colors is a Node.js library for adding colors to text in the terminal. A more performant drop-in replacement for chalk, with no dependencies.
String.prototypeSee a comparison to other libraries
const c = require('ansi-colors');
console.log(c.red('This is a red string!'));
console.log(c.green('This is a red string!'));
console.log(c.cyan('This is a cyan string!'));
console.log(c.yellow('This is a yellow string!'));
Colors take multiple arguments.
console.log(c.red('Some', 'red', 'text', 'to', 'display'));
Supports chained styles.
console.log(c.bold.red('this is a bold red message'));
console.log(c.bold.yellow.italic('this is a bold yellow italicized message'));
console.log(c.green.bold.underline('this is a bold green underlined message'));
Supports nested styles.
// using template literals
console.log(c.yellow(`foo ${c.red.bold('red')} bar ${c.cyan('cyan')} baz`));
// or as arguments
console.log(c.yellow('foo', c.red.bold('red'), 'bar', c.cyan('cyan'), 'baz'));
Easily enable/disable colors.
const c = require('ansi-colors');
// disable colors manually
c.enabled = false;
// or use a library to automatically detect support
c.enabled = require('color-support').stdout;
console.log(c.red('I will only be colored red if the terminal supports colors'));
Uses node's built-in util.format() to achieve printf-like formatting. The first argument is a string containing zero or more placeholder tokens. Each placeholder token is replaced with the converted value from the corresponding argument.
console.log(c.bold.red('%s:%s', 'foo', 'bar', 'baz'));
Even works with nested colors!
console.log(c.bold('%s:%s:%s', 'foo', c.red('bar'), 'baz'));
Use the .unstyle method to manually strip ANSI codes from a string.
console.log(c.unstyle(c.blue.bold('foo bar baz')));
//=> 'foo bar baz'
Note that bright and bright-background colors are not always supported.
blackbluecyangray (U.S.) and grey (everyone else)greenmagentaredwhiteyellowblueBrightcyanBrightgreenBrightmagentaBrightredBrightwhiteBrightyellowBrightbgBlackbgBluebgCyanbgGreenbgMagentabgRedbgWhitebgYellowBright background colors
bgBlackBrightbgBlueBrightbgCyanBrightbgGreenBrightbgMagentaBrightbgRedBrightbgWhiteBrightbgYellowBrightbold
dim
hidden
inverse
italic (Not widely supported)
reset
strikethrough (Not widely supported)
underline
A handful of common useful symbols are available on the c.symbols property.
console.log(c.symbols);
Windows
√×'...i─'>»?﹖‼Other platforms
✔✖…ℹ─❯›?﹖⚠MacBook Pro, Intel Core i7, 2.5 GHz, 16 GB.
Time it takes to load the module the first time:
ansi-colors: 2.057ms
chalk: 9.063ms
clorox: 1.701ms
# All Colors
ansi-colors x 93,508 ops/sec ±1.19% (88 runs sampled)
chalk x 8,871 ops/sec ±2.33% (81 runs sampled)
clorox x 1,401 ops/sec ±2.62% (77 runs sampled)
# Stacked colors
ansi-colors x 14,413 ops/sec ±1.35% (88 runs sampled)
chalk x 1,824 ops/sec ±2.46% (79 runs sampled)
clorox x 563 ops/sec ±2.83% (75 runs sampled)
# Nested colors
ansi-colors x 37,897 ops/sec ±1.02% (92 runs sampled)
chalk x 4,196 ops/sec ±1.88% (81 runs sampled)
clorox x 676 ops/sec ±2.70% (69 runs sampled)
| Feature | ansi-colors | chalk | clorox | colors |
|---|---|---|---|---|
| Nested colors | yes | yes | no | yes |
| Chained colors | yes | yes | You must call .toString() on result | yes |
| Toggle color support | yes | yes | no | yes |
| printf-like formatting | yes | no | no | no |
| Includes symbols | yes | no | no | no |
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
$ npm install && npm test
(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)
To generate the readme, run the following command:
$ npm install -g verbose/verb#dev verb-generate-readme && verb
You might also be interested in these projects:
| Commits | Contributor |
|---|---|
| 18 | doowb |
| 7 | jonschlinkert |
| 2 | Silic0nS0ldier |
Brian Woodward
Copyright © 2018, Brian Woodward. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on May 04, 2018.
FAQs
Easily add ANSI colors to your text and symbols in the terminal. A faster drop-in replacement for chalk, kleur and turbocolor (without the dependencies and rendering bugs).
The npm package ansi-colors receives a total of 26,162,118 weekly downloads. As such, ansi-colors popularity was classified as popular.
We found that ansi-colors demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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