Chalkee 🎨

A lightweight, optimized, and chainable terminal styling library for Node.js. Style your console output with colors, backgrounds, and text modifiers using a clean, fluent API.

Features

✨ Chainable API - Combine colors, backgrounds, and modifiers seamlessly
🎯 Tree-shakeable - Only bundle what you use (optimized module separation)
⚡ Highly Optimized - 9 caching layers for maximum performance
🎨 256-Color Support - Full hex and RGB color support
📦 Minimal Size - Incredibly compact bundle (~42.60 KB core)
🔄 Template Literal Support - Use backticks for styling
🌈 Auto-spacing - Automatic spacing between styled segments
🔌 Background Mode - Special mode for consistent background color changes

Installation

npm install chalkee
# or
pnpm add chalkee
# or
yarn add chalkee

Quick Start

import chalkee, { red, blue, bold, bgGreen } from 'chalkee'

// Basic colors
console.log(red`Hello World`)
console.log(blue`Styled text`)

// Chaining modifiers
console.log(bold.underline`Bold and underlined`)

// Combining foreground and background
console.log(red.bgGreen`Red text on green background`)

// Template literals
console.log(red`Error: ${errorCode}`)

// Auto-spacing
console.log(red`Error:`.as.blue`File not found`)

// Hex colors
console.log(chalkee.hex('#ff0000')`Red text`)

// RGB colors
console.log(chalkee.rgb(255, 0, 0)`Red text`)

API Reference

Colors

Foreground Colors

red, green, blue, yellow, magenta, cyan, white, black, gray, grey

Bright Colors

redBright, greenBright, blueBright, yellowBright, magentaBright, cyanBright, whiteBright, blackBright

Background Colors

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

Bright Background Colors

bgRedBright, bgGreenBright, bgBlueBright, bgYellowBright, bgMagentaBright, bgCyanBright, bgWhiteBright, bgBlackBright

Modifiers

• bold / b - Bold text
• dim / d - Dim/faint text
• italic / i - Italic text
• underline / u - Underlined text
• strikethrough / s - Strikethrough text
• inverse - Inverted colors
• hidden - Hidden text
• reset / r - Reset all styles

Custom Colors

Hex Colors

chalkee.hex('#ff0000')`Red text`
chalkee.hex('#f00')`Short hex also works`
chalkee.bgHex('#00ff00')`Green background`

RGB Colors

chalkee.rgb(255, 0, 0)`Red text`
chalkee.bgRgb(0, 255, 0)`Green background`

Special Features

Auto-spacing

Add automatic spacing between styled elements. This works with template literals, function calls, and operators:

const a = 2, b = 4;

// Simple usage
red`Error:`.as.blue`File not found`
// Output: "Error: File not found"

// Complex chaining with expressions and operators
red`first`.as(a)`+`.blue`second`(b)`=`.green(a + b)
// Output: "first 2 + second 4 = 6" (all with red color, some with blue)

Chainable Spacing & Variable Injection

You can eliminate ${} in template literals by chaining calls. Use (b) instead of ${b} for cleaner injection:

const a = 1, b = 2;
// Clean chaining: less typing, eliminates ${}
red`Result:`.as(a)`+`(b)`=`.green(a + b)
// result: Result: 1 + 2 = 3

// Standard way: more typing, verbose ${}
red`Result:`.as(`${a}+${b}=`).green`${a + b}` // Seems longer/tedious

Reset & Fresh Starts

Use .r or .reset to clear all styles in the middle of a chain and start fresh:

// Clear styles and apply new ones
red.bold.underline('styled').r.green.italic('after reset')

// Using shorthand with template literals
blue.dim`blue dim text`.r.yellow.bold`yellow bold text`

Shorthand Aliases

Save characters with compact aliases:

import { b, d, i, u, s, r } from 'chalkee'

b`bold`         // bold
d`dim`          // dim
i`italic`       // italic
u`underline`    // underline
s`strikethrough` // strikethrough
r`reset`        // reset (clears style)

Background Mode

Change background colors while keeping consistent text:

chalkee.bg.red`First`.blue`Second`.green`Third`
// All text is white (default), but backgrounds change

Smart Output

Styled results are not just strings, but callable objects that behave intelligently:

• String conversion: result.toString() or "" + result returns the ANSI-encoded string.
• Node.js Integration: Support for util.inspect.custom means console.log(result) shows the styled text directly in the terminal.
• Value access: result.valueOf() returns the ANSI-encoded string.

Complex Combinations

// Colors and modifiers accumulate in a chain
red`red`.bgBlue`bg blue`.bold`bold`
// Output: red text, then red on blue background, then red on blue background and bold

Template Literals

Use backticks for readable styling:

const name = 'Alice'
red`Hello ${name}`
// or
red`Hello`(name)

Usage Examples

Simple Styling

import { red, green, bold } from 'chalkee'

console.log(red`Error: Something went wrong`)
console.log(green`Success: Operation completed`)
console.log(bold`Important message`)

Complex Combinations

import chalkee from 'chalkee'

const success = bold.green`✓ Success`
const error = bold.red`✗ Error`
const warning = bold.yellow`⚠ Warning`

console.log(success)
console.log(error)
console.log(warning)

Custom Colors

import chalkee from 'chalkee'

// Hex color
console.log(chalkee.hex('#7c3aed')`Purple text`)

// RGB color
console.log(chalkee.rgb(124, 58, 237)`Also purple`)

// Background colors
console.log(chalkee.bgHex('#3b82f6')`Blue background`)

Conditional Styling

import { red, green } from 'chalkee'

const status = (success: boolean, message: string) => {
  return success ? green(message) : red(message)
}

console.log(status(true, 'All tests passed'))
console.log(status(false, 'Tests failed'))

Performance

Chalkee is highly optimized with multiple caching layers:

1. ANSI Code Caching - Pre-computed escape sequences
2. Color Definition Caching - Color lookups cached
3. Property Descriptor Caching - Prototype methods cached
4. State Merging Optimization - Structural sharing for style states
5. Runtime Color Control - Dynamic noColor flag for instant color toggle
6. Auto-spacing State Caching - Space state optimization
7. Modifier Lookup Caching - Fast modifier code access
8. 256-Color Mapping - Pre-mapped RGB to ANSI conversions
9. Instance Pooling - Efficient function object reuse

Bundle Sizes

Format	Size (gzipped)
ES Module	~7.17 KB
CommonJS	~6.47 KB
Core (all formats)	~42.60 KB total

Architecture

Chalkee uses a modular, tree-shakeable architecture:

• ChalkeeBase - Base class with core methods
• styler - ANSI code generation engine
• registry - Color and modifier definitions
• utils - Instance creation utilities
• callable-helpers - Property descriptors for methods
• Chalkee - Main callable factory
• modifiers - Modifier method attachment
• ansi-colors - Color export wrapper

Environment Variables & Runtime Control

Runtime Color Toggle

Control colors at runtime using any chainable function's noColor property:

import { red } from 'chalkee'

const message = red`Error message`
console.log(message)  // Shows styled output with ANSI codes

// Disable colors at runtime
red.noColor = true
console.log(message)  // Shows plain text without ANSI codes

// Re-enable colors
red.noColor = false
console.log(message)  // Shows styled output again

Note: The noColor flag is a static property shared across all styled functions. Setting it on any function (e.g., red.noColor, bold.noColor, bg.noColor) affects color output globally. Existing styled text objects will reflect the current noColor state when converted to string.

Environment Variables

Legacy: Environment variables (NO_COLOR, FORCE_COLOR) can still be used but must be set before the module is imported. For runtime control, use ChalkeeBase.noColor instead.

Note: Environment variables must be set before the module is imported, as they are cached at module load time.

Browser Compatibility

Chalkee is designed for Node.js only. It won't work in browsers because:

• Uses Node.js util module for inspect customization
• Relies on terminal ANSI escape codes
• Terminal environment assumptions

Comparison

Feature	Chalkee	chalk	ansi-colors
Chainable	✅	✅	❌
Hex Colors	✅	✅	❌
RGB Colors	✅	✅	❌
Tree-shakeable	✅	❌	✅
Auto-spacing	✅	❌	❌
Bundle Size	42.60 KB	~40 KB	~15 KB
Caching	9 layers	Minimal	Minimal

Testing

Run tests:

pnpm test

Run tests in watch mode:

pnpm test:watch

Tests cover:

• Basic color and modifier application
• Chaining and combinations
• Template literal usage
• Hex and RGB colors
• Background colors
• Auto-spacing functionality
• Reset and complex styling
• Edge cases

Development

Build

pnpm build

Build (minified)

pnpm build:min

Watch mode

pnpm dev

License

MIT

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Support

For issues, questions, or suggestions, please open an issue on the GitHub repository.

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Made with ❤️ for terminal enthusiasts