Dot Case

Transform text into dot.case format where words are lowercase and separated by dots.

🚀 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-dot-case

# yarn
yarn add text-dot-case

# pnpm
pnpm add text-dot-case

# bun
bun add text-dot-case

🎯 Quick Start

import { dotCase } from "text-dot-case";

console.log(dotCase("hello world")); // "hello.world"
console.log(dotCase("userProfileData")); // "user.profile.data"
console.log(dotCase("backgroundColor")); // "background.color"

📖 Usage

ES Modules (Recommended)

import { dotCase } from "text-dot-case";

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

CommonJS

const { dotCase } = require("text-dot-case");

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

TypeScript

import { dotCase, Options } from "text-dot-case";

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

🔄 Transformation Examples

Basic Transformations

import { dotCase } from "text-dot-case";

// From different cases
dotCase("Hello World"); // "hello.world"
dotCase("helloWorld"); // "hello.world"
dotCase("HelloWorld"); // "hello.world"
dotCase("hello_world"); // "hello.world"
dotCase("hello-world"); // "hello.world"
dotCase("HELLO_WORLD"); // "hello.world"
dotCase("CONSTANT_CASE"); // "constant.case"

// Complex examples
dotCase("XMLParser"); // "xml.parser"
dotCase("iPhone6Plus"); // "i.phone6.plus"
dotCase("HTML5Canvas"); // "html5.canvas"
dotCase("getUserID"); // "get.user.id"

Advanced Options

import { dotCase } from "text-dot-case";

// Custom word splitting
dotCase("XMLHttpRequest", {
  splitRegexp: /([a-z])([A-Z])/g,
}); // "xml.http.request"

// Custom character stripping
dotCase("[email protected]", {
  stripRegexp: /[@]/g,
}); // "hello.world.com"

// Custom transformation function
dotCase("API-v2-endpoint", {
  transform: (word, index) => {
    if (word === "API") return "api";
    if (word === "v2") return "v2";
    return word.toLowerCase();
  },
}); // "api.v2.endpoint"

🌍 Real-World Examples

Object Property Names

import { dotCase } from "text-dot-case";

// API response normalization
const apiResponse = {
  "First Name": "John",
  Last_Name: "Doe",
  emailAddress: "[email protected]",
  phoneNumber: "+1234567890",
};

const normalized = Object.keys(apiResponse).reduce((acc, key) => {
  acc[dotCase(key)] = apiResponse[key];
  return acc;
}, {});

console.log(normalized);
// {
//   "first.name": "John",
//   "last.name": "Doe",
//   "email.address": "[email protected]",
//   "phone.number": "+1234567890"
// }

Configuration Keys

import { dotCase } from "text-dot-case";

// Environment variables to config
dotCase("DATABASE_HOST"); // "database.host"
dotCase("apiSecretKey"); // "api.secret.key"
dotCase("maxRetryAttempts"); // "max.retry.attempts"
dotCase("REDIS_CONNECTION"); // "redis.connection"
dotCase("jwtTokenExpiry"); // "jwt.token.expiry"

File and Module Names

import { dotCase } from "text-dot-case";

// Component naming
dotCase("UserProfile"); // "user.profile"
dotCase("ShoppingCart"); // "shopping.cart"
dotCase("PaymentGateway"); // "payment.gateway"
dotCase("AuthMiddleware"); // "auth.middleware"
dotCase("EmailValidator"); // "email.validator"

Method and Function Names

import { dotCase } from "text-dot-case";

// Class methods to dot notation
dotCase("getUserById"); // "get.user.by.id"
dotCase("calculateTotalPrice"); // "calculate.total.price"
dotCase("validateEmailAddress"); // "validate.email.address"
dotCase("processPaymentData"); // "process.payment.data"
dotCase("generateAccessToken"); // "generate.access.token"

Database and Schema Mapping

import { dotCase } from "text-dot-case";

// Transform form data for nested objects
function normalizeFormData(formData) {
  const normalized = {};

  for (const [key, value] of Object.entries(formData)) {
    normalized[dotCase(key)] = value;
  }

  return normalized;
}

const form = {
  firstName: "John",
  lastName: "Doe",
  emailAddress: "[email protected]",
  billingAddress: "123 Main St",
  shippingAddress: "456 Oak Ave",
};

console.log(normalizeFormData(form));
// {
//   "first.name": "John",
//   "last.name": "Doe",
//   "email.address": "[email protected]",
//   "billing.address": "123 Main St",
//   "shipping.address": "456 Oak Ave"
// }

Constants and Enums

import { dotCase } from "text-dot-case";

// Transform constants
dotCase("MAX_FILE_SIZE"); // "max.file.size"
dotCase("DEFAULT_TIMEOUT"); // "default.timeout"
dotCase("ERROR_MESSAGES"); // "error.messages"
dotCase("HTTP_STATUS_CODES"); // "http.status.codes"
dotCase("VALIDATION_RULES"); // "validation.rules"

📖 API Reference

dotCase(input, options?)

Converts a string to dot.case.

Parameters

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

Returns

• string: The dot.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 { dotCase } from "text-dot-case";

// Split on specific patterns
dotCase("XMLHttpRequest", {
  splitRegexp: /([a-z])([A-Z])/g,
}); // "xml.http.request"

// Split on numbers
dotCase("user123data", {
  splitRegexp: /([a-zA-Z])(\d)/g,
}); // "user.123.data"

Custom Character Stripping

import { dotCase } from "text-dot-case";

// Strip specific characters
dotCase("[email protected]", {
  stripRegexp: /[@]/g,
}); // "hello.world.com"

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

Custom Transform Functions

import { dotCase } from "text-dot-case";

// Preserve specific formatting
dotCase("XML-HTTP-Request", {
  transform: (word, index) => {
    const acronyms = ["xml", "http", "api", "url"];
    if (acronyms.includes(word.toLowerCase())) {
      return word.toLowerCase();
    }
    return word.toLowerCase();
  },
}); // "xml.http.request"

// Custom business logic
dotCase("UserV2API", {
  transform: (word, index) => {
    if (word === "V2") return "v2";
    if (word === "API") return "api";
    return word.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-camel-case - Convert to camelCase
• text-capital-case - Convert to Capital Case
• text-constant-case - Convert to CONSTANT_CASE
• text-header-case - Convert to Header-Case
• text-is-lower-case - Check if text is lower case
• 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: [email protected]
• 🐛 Issues: GitHub Issues
• 💬 Discussions: GitHub Discussions
• 📖 Documentation: Full Documentation

Made with ❤️ by Dmitry Selikhov