🧩 Stringkit.js

A focused, zero-dependency utility library for common string manipulations in JavaScript. Clean API, no global prototype pollution, and built for real-world use.

✨ Features

• A suite of clean, composable string utilities
• No global prototype modifications
• Safe and immutable methods
• Designed for real-world use cases
• Fully documented and tested

📦 Installation

npm install @herb-ert/stringkitjs

If you're using ES Modules:

import * as stringkit from '@herb-ert/stringkitjs';

Or with CommonJS:

const stringkit = require('@herb-ert/stringkitjs');

🚀 Usage

import { capitalize, kebabCase } from '@herb-ert/stringkitjs';

console.log(capitalize("hello world")); // "Hello world"
console.log(kebabCase("Hello World"));  // "hello-world"

🧠 API

Functions

Method	Description
capitalize(string)	Capitalizes the first character of a string.
title(string, smart)	Converts a string to title case. Optionally applies smart title casing to avoid capitalizing common short words.
stripTags(string)	Removes all HTML tags from a string.
slugify(string)	Converts a string into a URL-friendly slug.
truncate(string, length)	Truncates a string to a specific length, appending "..." if truncated.
camelCase(string)	Converts a string to camelCase.
kebabCase(string)	Converts a string to kebab-case.
snakeCase(string)	Converts a string to snake_case.
trimLines(string)	Trims whitespace from the start and end of each line in a multi-line string.
removeExtraSpaces(string)	Removes extra spaces from a string, reducing multiple spaces to a single space.
isBlank(string)	Checks whether a string is empty or contains only whitespace.
startsWithIgnoreCase(string, prefix)	Checks if a string starts with a given prefix, ignoring case sensitivity.
endsWithIgnoreCase(string, suffix)	Checks if a string ends with a given suffix, ignoring case sensitivity.
includesIgnoreCase(string, substring)	Checks if a string includes a given substring, ignoring case sensitivity.
escapeRegExp(string)	Escapes special characters in a string for use in a regular expression.
stripAnsi(string)	Removes ANSI escape codes from a string.
repeatString(string, times)	Repeats a string a specified number of times.
commonPrefix(strings)	Finds the longest common prefix among an array of strings.
center(string, length, char = ' ')	Centers a string by padding it on both sides with a specified character.
lpad(string, length, char = ' ')	Pads the left side of a string to a specified total length.
rpad(string, length, char = ' ')	Pads the right side of a string to a specified total length.
truncateWords(string, wordCount)	Truncates a string to a specific number of words.
pascalCase(string)	Converts a string to PascalCase.
reverse(string)	Reverses the characters in a string.
assertString(value, name)	Asserts that the given value is a string.

📦 More Examples

import {
  snakeCase,
  stripTags,
  title,
  startsWithIgnoreCase
} from '@herb-ert/stringkitjs';

console.log(snakeCase("Hello World"));                    // "hello_world"
console.log(stripTags("<p>Hello</p>"));                   // "Hello"
console.log(title("the big brown fox"));                  // "The Big Brown Fox"
console.log(startsWithIgnoreCase("JavaScript", "java"));  // true

🧪 Validation

All functions are pure and expect valid strings. Invalid types will throw helpful errors.

capitalize(42); // ❌ TypeError: Expected "string" to be a string, but got number

🔧 License

MIT © herb-ert