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153 packages found
Runtime library to validate data against TypeScript interfaces
An easy and powerful data validation code generator by JavaScript.
Binary wrapper for Flow - A static type checker for JavaScript
A type checking library where each exported function returns either true or false and does not throw. Also added tests.
A tiny and fast dynamic type checker/enforcer library
A simple and composable way to validate data in JavaScript (and TypeScript).
A recursive run-time type checking package that is simple to use yet provides all the functionality you will ever need. Written by and for Typescript.
Check data type
A small set of functions to check value against a specific type
- type
- check
- guard
- isNumber
- isArray
- isString
- checker
- isFinite
- undefined
- null
- primitive
- isFunction
- function
- isUndefined
Extended JavaScript Type Validator
A simple type checking library for Node.js
👺 weak but accurate type checking that returns a string representation of input's type
- type
- types
- coerce
- coercion
- checker
- check
- flow
- typing
- typeof
- typeov
- detection
- ispromise
- isnumber
- isinfinity
- View more
Superfast runtime validators with only one line
Thorough javascript type checker
Detect and validate file types by their signatures (✨magic numbers✨)
A small library for checking types
a simple javascript type checker & assertion library
A tiny type checker
Schemas for JSON Objects, or simply SJOT, offers faster JSON validation and type checking with lightweight schemas and compact validators. SJOT schemas have the look and feel of object templates and are easy to use.