chalk

Terminal string styling for Node.js — colorize and style CLI output with a chainable, expressive API.

chalk

General JS

Terminal string styling for Node.js — colorize and style CLI output with a chainable, expressive API.

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Fit

Bundle (gzip)

2.7 kB

6.7 kB raw

Install size includes transitive dependencies. Bundle size is gzipped browser payload.

Freshness

The Problem

Printing colored or styled output to the terminal requires manually constructing ANSI escape codes, checking if the terminal supports color, and ensuring codes are reset after each styled string.

What It Does

Chalk provides a fluent API for applying colors, backgrounds, and text styles (bold, italic, underline) to terminal strings. It auto-detects terminal color support and degrades gracefully. Nested styles work correctly with automatic reset sequencing.

Installation

bash
npm install chalk

Usage Example

typescript
import chalk from 'chalk';

// Colors and styles
console.log(chalk.green('✓ Build succeeded'));
console.log(chalk.red.bold('✗ 3 errors found'));
console.log(chalk.yellow.italic('⚠ 2 warnings'));

// Template literals
console.log(chalk`
  {blue Info:}  Deploying to {underline production}
  {green.bold Success:} {white 42} files uploaded
  {red Error:}  Connection timeout after {yellow 30s}
`);

// Dynamic highlighting
const status = (code: number) =>
  code < 400 ? chalk.green(code) : chalk.red(code);

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