Param Case
Transform text into param-case format where words are lowercase and separated by hyphens.
๐ 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
๐ฆ Installation
# npm
npm install text-param-case
# yarn
yarn add text-param-case
# pnpm
pnpm add text-param-case
# bun
bun add text-param-case
๐ฏ Quick Start
import { paramCase } from "text-param-case";
console.log(paramCase("hello world")); // "hello-world"
console.log(paramCase("userProfileData")); // "user-profile-data"
console.log(paramCase("backgroundColor")); // "background-color"
๐ Usage
ES Modules (Recommended)
import { paramCase } from "text-param-case";
console.log(paramCase("hello world")); // "hello-world"
CommonJS
const { paramCase } = require("text-param-case");
console.log(paramCase("hello world")); // "hello-world"
TypeScript
import { paramCase, Options } from "text-param-case";
const result: string = paramCase("hello world");
console.log(result); // "hello-world"
๐ Transformation Examples
Basic Transformations
import { paramCase } from "text-param-case";
// From different cases
paramCase("hello world"); // "hello-world"
paramCase("Hello World"); // "hello-world"
paramCase("HELLO WORLD"); // "hello-world"
paramCase("camelCase"); // "camel-case"
paramCase("PascalCase"); // "pascal-case"
paramCase("snake_case"); // "snake-case"
paramCase("kebab-case"); // "kebab-case"
paramCase("dot.case"); // "dot-case"
// Complex examples
paramCase("XMLHttpRequest"); // "xml-http-request"
paramCase("iPhone"); // "i-phone"
paramCase("version 1.2.3"); // "version-1-2-3"
paramCase("userProfileData"); // "user-profile-data"
Advanced Options
import { paramCase } from "text-param-case";
// Custom word splitting
paramCase("XMLHttpRequest", {
splitRegexp: /([a-z])([A-Z])/g,
}); // "xml-http-request"
// Custom character stripping
paramCase("hello@world.com", {
stripRegexp: /[@.]/g,
}); // "hello-world-com"
// Custom transformation function
paramCase("api-v2-endpoint", {
transform: (word, index) => {
if (word === "api") return "api";
if (word === "v2") return "v2";
return word.toLowerCase();
},
}); // "api-v2-endpoint"
๐ Real-World Examples
URL Parameters
import { paramCase } from "text-param-case";
// URL parameter names
paramCase("userId"); // "user-id"
paramCase("sortOrder"); // "sort-order"
paramCase("pageSize"); // "page-size"
paramCase("filterType"); // "filter-type"
paramCase("searchQuery"); // "search-query"
CSS Class Names
import { paramCase } from "text-param-case";
// CSS class generation
paramCase("primaryButton"); // "primary-button"
paramCase("navigationMenu"); // "navigation-menu"
paramCase("contentWrapper"); // "content-wrapper"
paramCase("errorMessage"); // "error-message"
paramCase("loadingSpinner"); // "loading-spinner"
HTML Attributes
import { paramCase } from "text-param-case";
// HTML attribute names
paramCase("dataTestId"); // "data-test-id"
paramCase("ariaLabel"); // "aria-label"
paramCase("tabIndex"); // "tab-index"
paramCase("contentEditable"); // "content-editable"
paramCase("spellCheck"); // "spell-check"
API Endpoint Names
import { paramCase } from "text-param-case";
// REST API endpoints
paramCase("getUserProfile"); // "get-user-profile"
paramCase("createNewOrder"); // "create-new-order"
paramCase("updateUserData"); // "update-user-data"
paramCase("deleteAccount"); // "delete-account"
paramCase("resetPassword"); // "reset-password"
Configuration Processing
import { paramCase } from "text-param-case";
// Transform object keys for URL parameters
const filters = {
sortOrder: "desc",
pageSize: 20,
filterType: "active",
searchQuery: "javascript",
};
const urlParams = new URLSearchParams(
Object.fromEntries(
Object.entries(filters).map(([key, value]) => [paramCase(key), value]),
),
);
console.log(urlParams.toString());
// "sort-order=desc&page-size=20&filter-type=active&search-query=javascript"
Component Props Processing
import { paramCase } from "text-param-case";
function generateDataAttributes(props) {
const dataAttrs = {};
Object.entries(props).forEach(([key, value]) => {
if (key.startsWith("data")) {
const attrName = paramCase(key);
dataAttrs[attrName] = value;
}
});
return dataAttrs;
}
const props = {
dataTestId: "submit-button",
dataTrackingId: "btn-submit",
dataAnalytics: "form-submission",
};
console.log(generateDataAttributes(props));
// {
// "data-test-id": "submit-button",
// "data-tracking-id": "btn-submit",
// "data-analytics": "form-submission"
// }
Form Field Processing
import { paramCase } from "text-param-case";
function createFormField(name, type = "text", options = {}) {
const fieldName = paramCase(name);
const fieldId = `field-${fieldName}`;
return {
name: fieldName,
id: fieldId,
type,
className: `form-${fieldName}`,
...options,
};
}
console.log(createFormField("firstName"));
// {
// name: "first-name",
// id: "field-first-name",
// type: "text",
// className: "form-first-name"
// }
CSS-in-JS Processing
import { paramCase } from "text-param-case";
function convertCSSProperties(styles) {
const converted = {};
Object.entries(styles).forEach(([property, value]) => {
const cssProperty = paramCase(property);
converted[cssProperty] = value;
});
return converted;
}
const jsStyles = {
backgroundColor: "#fff",
fontSize: "16px",
marginTop: "10px",
borderRadius: "4px",
};
console.log(convertCSSProperties(jsStyles));
// {
// "background-color": "#fff",
// "font-size": "16px",
// "margin-top": "10px",
// "border-radius": "4px"
// }
Route Generation
import { paramCase } from "text-param-case";
class RouteGenerator {
static generateRoute(controller, action) {
const controllerPath = paramCase(controller);
const actionPath = paramCase(action);
return `/${controllerPath}/${actionPath}`;
}
static generateApiRoute(resource, action) {
const resourcePath = paramCase(resource);
const actionPath = paramCase(action);
return `/api/${resourcePath}/${actionPath}`;
}
}
console.log(RouteGenerator.generateRoute("UserProfile", "EditSettings"));
// "/user-profile/edit-settings"
console.log(RouteGenerator.generateApiRoute("BlogPost", "GetComments"));
// "/api/blog-post/get-comments"
๐ API Reference
paramCase(input, options?)
Converts a string to param-case format.
Parameters
input
(string
): The string to convertoptions
(Options
, optional): Configuration options
Returns
string
: The param-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[];
}
๐ง Advanced Configuration
Custom Word Splitting
import { paramCase } from "text-param-case";
// Split on specific patterns
paramCase("XMLHttpRequest", {
splitRegexp: /([a-z])([A-Z])/g,
}); // "xml-http-request"
// Split on numbers
paramCase("user123data", {
splitRegexp: /([a-zA-Z])(\d)/g,
}); // "user-123-data"
Custom Character Stripping
import { paramCase } from "text-param-case";
// Strip specific characters
paramCase("hello@world.com", {
stripRegexp: /[@.]/g,
}); // "hello-world-com"
// Strip all non-alphanumeric
paramCase("hello!@#world", {
stripRegexp: /[^a-zA-Z0-9]/g,
}); // "hello-world"
Custom Transform Functions
import { paramCase } from "text-param-case";
// Preserve acronyms
paramCase("xml-http-request", {
transform: (word, index) => {
const acronyms = ["xml", "http", "api", "url", "html", "css", "js"];
if (acronyms.includes(word.toLowerCase())) {
return word.toLowerCase();
}
return word.toLowerCase();
},
}); // "xml-http-request"
// Custom business logic
paramCase("user-v2-api", {
transform: (word, index) => {
if (word === "v2") return "v2";
if (word === "api") return "api";
return word.toLowerCase();
},
}); // "user-v2-api"
๐ Bundle Size
This package is optimized for minimal bundle size:
- Minified: ~450B
- Gzipped: ~250B
- Tree-shakeable: Yes
- Side effects: None
๐ Browser Support
- Modern browsers: ES2015+ (Chrome 51+, Firefox 54+, Safari 10+)
- Node.js: 12+
- TypeScript: 4.0+
- Bundle formats: UMD, ESM, CommonJS
๐งช 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
๐ Related Packages
text-kebab-case
- Convert to kebab-case (alias)text-snake-case
- Convert to snake_casetext-camel-case
- Convert to camelCasetext-pascal-case
- Convert to PascalCasetext-case
- All case transformations in one package
๐ License
๐ค Contributing
- Fork the repository
- Create your feature branch (
git checkout -b feature/amazing-feature
) - Commit your changes (
git commit -m 'Add some amazing feature'
) - Push to the branch (
git push origin feature/amazing-feature
) - Open a Pull Request
๐ Support
- ๐ง Email: selikhov.dmitrey@gmail.com
- ๐ Issues: GitHub Issues
- ๐ฌ Discussions: GitHub Discussions
- ๐ Documentation: Full Documentation
Made with โค๏ธ by Dmitry Selikhov