Dependency-Free JavaScript Utility Libraries

es-toolkit is a JavaScript utility library and TypeScript data transformation toolset designed as a high-performance alternative to traditional utility suites. It serves as a tree-shakable module library and a compatibility layer for those migrating from legacy dependencies by mirroring established function signatures. The project is specifically optimized for AI code generation, providing structured documentation and specialized skill sets to improve the accuracy and discoverability of its functions for AI coding assistants. Its architecture focuses on a zero-dependency core and modular expo

Functional-Light-JS is a JavaScript functional programming library designed to implement functional patterns within JavaScript applications. It serves as a toolkit for declarative data processing, immutable data management, and the construction of complex logic through higher-order functions. The library focuses on a pragmatic implementation of functional programming, providing utilities for curried argument application and function composition. It emphasizes the use of pure functions to calculate state updates and manage application data without side effects. The project covers broad capabi

Ramda is a functional JavaScript standard library and toolset for immutable data transformation and composition. It provides a comprehensive suite of pure utility functions designed to enable declarative data processing pipelines. The library is distinguished by its use of automatic function currying and a data-last argument order. These design patterns allow multi-argument functions to be partially applied, simplifying the construction of processing chains where data is passed through a sequence of operations. The toolkit covers broad data manipulation capabilities, including list processin

Lodash is a JavaScript utility library and data manipulation toolkit. It provides a collection of modular functions for transforming, filtering, and validating arrays, objects, strings, and numbers. The project functions as a functional programming toolkit, offering capabilities for function composition, currying, and lazy evaluation. It includes mechanisms for execution control, such as debouncing and throttling, to manage the timing and frequency of function invocations. The library covers a broad surface of data operations, including deep cloning and merging of complex nested structures,

Underscore is a JavaScript utility library providing a suite of functional programming and data manipulation helpers. It serves as a framework for transforming data collections, composing functions, managing objects, and performing precise data type validation without modifying core language prototypes. The project includes a functional programming toolkit designed to control function execution timing and behavior through techniques such as debouncing, throttling, and partial application. It also provides a dedicated object manipulation utility for cloning, merging, picking, and omitting prop

Just is a collection of JavaScript utility libraries designed for data manipulation, functional programming, performance optimization, statistical analysis, and string processing. It provides a set of tools for deep cloning, filtering, and transforming complex objects and arrays. The project is structured as a series of zero-dependency modules, allowing utilities to be used independently to minimize bundle size. It implements functional programming patterns including currying, piping, and partial application, and provides execution control through memoization, debouncing, and throttling. The

Mitt is a lightweight event emitter and publish-subscribe messaging library designed for managing communication between decoupled components. It provides a minimal utility for registering, dispatching, and removing event listeners within browser and Node.js environments. The library distinguishes itself through a functional interface that maintains a small memory footprint by using function references for listener management. It supports wildcard pattern matching, allowing a single handler to respond to all emitted events, and executes callbacks synchronously to ensure predictable state updat

This is a suite of JavaScript utilities for the bidirectional conversion and manipulation of URL components and query parameters. It provides a mechanism for parsing URL query strings into data objects and serializing those objects back into URL-encoded strings. The library includes functions for filtering, isolating, and modifying parameters within a full URL or query string. It supports the construction of complete web links by combining base addresses with formatted query parameters. The toolset covers data transformation primitives such as alphabetical key sorting, input sanitization, an

Type check values

This library provides a collection of utilities for processing, validating, and formatting Brazilian personal data and national identifiers. It serves as a toolkit for managing common data formats within the Brazilian ecosystem, ensuring that information such as tax identification numbers, phone numbers, and postal codes conform to official standards. The project distinguishes itself by combining mathematical checksum verification with structural pattern matching to ensure data integrity. It includes specialized functions for generating synthetic, valid identification numbers for testing envi