Capital Case

Transform text into Capital Case format where each word is capitalized and separated by spaces.

🚀 Features

• Lightweight - Only ~450B minified + gzipped
• Type-safe - Full TypeScript support with comprehensive type definitions
• Zero dependencies - No external dependencies
• Tree-shakeable - ES modules support
• Universal - Works in browsers, Node.js, and serverless environments
• Well-tested - Comprehensive test suite with edge cases
• Customizable - Flexible options for advanced use cases

📦 Installation

# npm
npm install text-capital-case

# yarn
yarn add text-capital-case

# pnpm
pnpm add text-capital-case

# bun
bun add text-capital-case

🎯 Quick Start

import { capitalCase } from "text-capital-case";

console.log(capitalCase("hello world")); // "Hello World"
console.log(capitalCase("user_profile_data")); // "User Profile Data"
console.log(capitalCase("backgroundColor")); // "Background Color"

📖 Usage

ES Modules (Recommended)

import { capitalCase } from "text-capital-case";

console.log(capitalCase("hello world")); // "Hello World"

CommonJS

const { capitalCase } = require("text-capital-case");

console.log(capitalCase("hello world")); // "Hello World"

TypeScript

import { capitalCase, Options } from "text-capital-case";

const result: string = capitalCase("hello world");
console.log(result); // "Hello World"

🔄 Transformation Examples

Basic Transformations

import { capitalCase } from "text-capital-case";

// From different cases
capitalCase("hello world"); // "Hello World"
capitalCase("Hello World"); // "Hello World"
capitalCase("HELLO WORLD"); // "Hello World"
capitalCase("camelCase"); // "Camel Case"
capitalCase("PascalCase"); // "Pascal Case"
capitalCase("snake_case"); // "Snake Case"
capitalCase("kebab-case"); // "Kebab Case"
capitalCase("dot.case"); // "Dot Case"

// Complex examples
capitalCase("XMLHttpRequest"); // "Xml Http Request"
capitalCase("iPhone"); // "I Phone"
capitalCase("version 1.2.3"); // "Version 1 2 3"
capitalCase("userProfileData"); // "User Profile Data"

Advanced Options

import { capitalCase } from "text-capital-case";

// Custom word splitting
capitalCase("XMLHttpRequest", {
  splitRegexp: /([a-z])([A-Z])/g,
}); // "Xml Http Request"

// Custom character stripping
capitalCase("hello@world.com", {
  stripRegexp: /[@.]/g,
}); // "Hello World Com"

// Custom transformation function
capitalCase("api-v2-endpoint", {
  transform: (word, index) => {
    if (word === "api") return "API";
    if (word === "v2") return "V2";
    return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
  },
}); // "API V2 Endpoint"

🌍 Real-World Examples

Business Titles and Names

import { capitalCase } from "text-capital-case";

// Job titles
capitalCase("chief executive officer"); // "Chief Executive Officer"
capitalCase("senior software engineer"); // "Senior Software Engineer"
capitalCase("product manager"); // "Product Manager"
capitalCase("data scientist"); // "Data Scientist"
capitalCase("marketing director"); // "Marketing Director"

Document Headings

import { capitalCase } from "text-capital-case";

// Document sections
capitalCase("table of contents"); // "Table Of Contents"
capitalCase("executive summary"); // "Executive Summary"
capitalCase("financial overview"); // "Financial Overview"
capitalCase("risk assessment"); // "Risk Assessment"
capitalCase("implementation plan"); // "Implementation Plan"

Product and Service Names

import { capitalCase } from "text-capital-case";

// Product names
capitalCase("premium subscription"); // "Premium Subscription"
capitalCase("enterprise solution"); // "Enterprise Solution"
capitalCase("mobile application"); // "Mobile Application"
capitalCase("cloud storage"); // "Cloud Storage"
capitalCase("customer support"); // "Customer Support"

Form Labels and UI Text

import { capitalCase } from "text-capital-case";

// Form fields
capitalCase("billing information"); // "Billing Information"
capitalCase("shipping address"); // "Shipping Address"
capitalCase("payment method"); // "Payment Method"
capitalCase("contact details"); // "Contact Details"
capitalCase("account settings"); // "Account Settings"

Content Categories

import { capitalCase } from "text-capital-case";

// Transform content categories
const categories = [
  "web_development",
  "machine-learning",
  "data.analysis",
  "userExperience",
  "projectManagement",
];

const formattedCategories = categories.map(capitalCase);
console.log(formattedCategories);
// [
//   "Web Development",
//   "Machine Learning",
//   "Data Analysis",
//   "User Experience",
//   "Project Management"
// ]

📖 API Reference

capitalCase(input, options?)

Converts a string to Capital Case.

Parameters

• input (string): The string to convert
• options (Options, optional): Configuration options

Returns

• string: The Capital Case formatted string

Options

interface Options {
  // Custom transform function for word processing
  transform?: (word: string, index: number, words: string[]) => string;

  // Regex to strip characters before processing
  stripRegexp?: RegExp;

  // Custom split function
  split?: (value: string) => string[];
}

🔧 Advanced Configuration

Custom Word Splitting

import { capitalCase } from "text-capital-case";

// Split on specific patterns
capitalCase("XMLHttpRequest", {
  splitRegexp: /([a-z])([A-Z])/g,
}); // "Xml Http Request"

// Split on numbers
capitalCase("user123data", {
  splitRegexp: /([a-zA-Z])(\d)/g,
}); // "User 123 Data"

Custom Character Stripping

import { capitalCase } from "text-capital-case";

// Strip specific characters
capitalCase("hello@world.com", {
  stripRegexp: /[@.]/g,
}); // "Hello World Com"

// Strip all non-alphanumeric
capitalCase("hello!@#world", {
  stripRegexp: /[^a-zA-Z0-9]/g,
}); // "Hello World"

Custom Transform Functions

import { capitalCase } from "text-capital-case";

// Preserve acronyms
capitalCase("xml-http-request", {
  transform: (word, index) => {
    const acronyms = ["xml", "http", "api", "url", "html", "css", "js"];
    if (acronyms.includes(word.toLowerCase())) {
      return word.toUpperCase();
    }
    return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
  },
}); // "XML HTTP Request"

// Custom business logic
capitalCase("user-v2-api", {
  transform: (word, index) => {
    if (word === "v2") return "V2";
    if (word === "api") return "API";
    return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
  },
}); // "User V2 API"

📊 Bundle Size

This package is optimized for minimal bundle size:

• Minified: ~450B
• Gzipped: ~250B
• Tree-shakeable: Yes
• Side effects: None

🌍 Browser Support

• Modern browsers: ES2015+ (Chrome 51+, Firefox 54+, Safari 10+)
• Node.js: 12+
• TypeScript: 4.0+
• Bundle formats: UMD, ESM, CommonJS

🧪 Testing

# Run tests
pnpm test

# Run tests in watch mode
pnpm test --watch

# Run tests with coverage
pnpm test --coverage

# Type checking
pnpm typecheck

# Linting
pnpm lint

🔗 Related Packages

• text-title-case - Convert to Title Case
• text-sentence-case - Convert to Sentence case
• text-pascal-case - Convert to PascalCase
• text-camel-case - Convert to camelCase
• text-case - All case transformations in one package

📜 License

MIT © Dmitry Selikhov

🤝 Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

🆘 Support

• 📧 Email: selikhov.dmitrey@gmail.com
• 🐛 Issues: GitHub Issues
• 💬 Discussions: GitHub Discussions
• 📖 Documentation: Full Documentation

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Made with ❤️ by Dmitry Selikhov