keywords:isString - npm search

core-util-is

The `util.is*` functions introduced in Node v0.12.

published version 1.0.3, 4 years ago1717 dependents licensed under $MIT

293,494,553

Comprehensive TypeScript/JavaScript utility library with cross-environment support (Node.js, browser, web worker) providing helper functions, polyfills (ES5-ES2023), type checking utilities, and optimized implementations for better minification and code r

nevware21bot

published version 0.12.5, 2 months ago33 dependents licensed under $MIT

2,109,630

typechecker

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

bevryme

published version 9.3.0, 2 years ago37 dependents licensed under $Artistic-2.0

1,062,280

@daybrush/utils

utils for daybrush

younkue

published version 1.13.0, 2 years ago88 dependents licensed under $MIT

871,931

@phun-ky/typeof

A set of JavaScript helper functions to check for types

phun-ky

published version 1.2.20, 4 days ago5 dependents licensed under $MIT

309,258

ts-type-guards

Curried TypeScript type guards for primitive types and classes

alling

published version 0.7.0, 5 years ago8 dependents licensed under $MIT

26,352

ts-util-is

TypeScript typeof utility helper with no dependencies.

justinlettau

published version 2.1.0, a year ago19 dependents licensed under $MIT

15,874

node-screwdriver

Node toolkit adding some helpful functions: files, array, string, color, math ...

komrod

published version 0.1.7, 8 years ago2 dependents licensed under $MIT

4,231

typeco

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

nutboltu

published version 1.0.0, 7 years ago3 dependents licensed under $MIT

3,190

@js-utilities/typecheck

Utility library for javascript type checking.

shapovalov_v

published version 0.1.6, 4 years ago3 dependents licensed under $MIT

1,976

prototyped.js

Common typescript ready prototypes available in both CommonJS and ECMAScript

ardalanamini

published version 3.0.5, 3 years ago3 dependents licensed under $MIT

1,421

@extremejs/utils

ExtremeJS Utilities

ardalanamini

published version 1.0.0-beta.22, a year ago3 dependents licensed under $MIT

809

x-utils-es

helper tools for javascript validation

anon101

published version 2.4.0, 4 years ago0 dependents licensed under $MIT

284

@renet-consulting/util

This library provides next util: isBoolean, isFunction, isNumber, isNumbers, isObject and isString, function can be object, number can not be NaN.

illia.antonov

published version 17.0.0, a year ago3 dependents licensed under $MIT

203

pp-is

Collection of methods for check

carlos-sweb

published version 1.2.7, a month ago6 dependents licensed under $MIT

189

@alttiri/util-js

Some util functions for personal use

alttiri

published version 1.19.3-20250629, 12 days ago2 dependents licensed under $MIT

129

@utilify/types

A utility library for type checks and type manipulation in JavaScript and TypeScript, providing functions to determine types and verify values like null, undefined, boolean, number, and more.