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270 packages found
Function takes array and triggers error if not all items in it are arrays
Function triggers error if argument is not array
Type check values: `is.string('🦄') //=> true`
Type checking for package.json
Function triggers error if argument is not a primitive type
Pure Javascript implementation for truly checking if the provided input is an IP address. Based on RFC 791 (IPv4), RFC 4291 (IPv6), and RFC 4632 (CIDR).
Simple type validation utilities. Meant for checking types of argument input in microlibraries.
Simple and lightweight module for dynamic type checking.
Checkjs is a library for type checking and more!
Object template declaration and runtime type checking
2 functions that check if passed argument is or is not a finite number
Fast, extensive and customizable type checking library
Function triggers error if argument is not type 'string'
a tool help for checking type of function's params.
A simple type checking module for JavaScript 😆
Babel plugin for type checking based on JSDoc comments in selected environments.
A utility for type checking elements on an array. The library is inspired from chai framework supporting chaining to combine multiple operations.
A module to validate the data type in javascript.