JSPM

JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Simple and convenient generator of prototype based constructor functions

A javascript library which allows to check javascript value types at runtime

Validate object properties against type schema

A collection of small utility functions to check variable types

JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.

Type checker for typescript

High-performance WebAssembly theorem prover with dependent types, hash-consing (150x faster), Ed25519 proof signatures, MCP support for Claude Code, AgentDB vector search, episodic memory, and ReasoningBank learning. Formal verification with cryptographic

TypeScript Library for safe type assertion

Collection of small, essential scripts designed to be used across various projects. These simple utilities are crafted for speed, ease of use, and versatility.

Type checker for Synth AST - cross-language type inference and validation

Basic runtime type checking

MCP server for Zig — AI-powered code analysis, validation, and documentation with fine-tuned LLM

A collection of "is"-style helpers to help solidify if something "is" something else. Has no dependencies and uses only raw JavaScript methodology.

Traverses the AST to perform static analysis, semantic checks, and error detection.

Check if a value is property accessible

Check your types at runtime with ESNext syntax by meta programing in node.js and browser with interfaces, types, strict object and more.

🛠️ 智能 TypeScript 类型分析和清理工具 - 专为 Vue3/React 项目设计，自动发现未使用类型、重复定义和类型错误

Check your types at runtime with ESNext syntax by meta programing in node.js and browser with interfaces, strict object and more.

Library for checking data values and type safety

Simple and light-weight JavaScript type checker that brings convenience!

A fixed version of the native javascript typeof function.

Provides type detection and analysis for ANY Javascript object (including custom types) in any environment, even where native operators falter.

Create validations with ease

Runtime type annotations for CoffeeScript (and JavaScript too!)

A simple runtime JSON type checker

A small library for checking types

Type checker for typescript

A JavaScript compiler and TypeScript checker written in Rust with a focus on static analysis and runtime performance

This package is designed to assist developers in type checking and validation for various JavaScript values. It provides a collection of type-checking functions, and utilities to validate your values.

Just advanced version of type checker, made simple to use

CLI tool to statically type-check JavaScript via JSDoc annotations

A lightweight typed superset for JavaScript that catches type mismatches before runtime

Comprehensive validation toolkit for the Prism programming language

A JavaScript library that checks whether the value is of a specific type

A super tiny library that verifies types

Modular runtime type checker with focus on creating readable and smart error messages

Data type checker

Runtime Type Check for Typescript

A small package for checking if a value is a certain type.

Runtime type-checking of any value in javascript

The object typeChecker checks javascript types

Ezno as a plugin

Basic type checking

A type-safe subset of ES6

it will return the type of any object

A checker for types in typescript

An utility to check if a value is a number (allowing string numbers optionally).

JavaScript library to check data types

toolbox for development

Blazing fast TypeScript type checker powered by TypeScript-Go, accessible via Bun FFI