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2073 packages found
Test if a value is a Uint16Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- uint16array
- uint16
- unsigned
- integer
- int
- uint
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Simple utility for type check.
Verify if something is a Promise
Check if a value is a direct instance of a class (not inherited from)
Test if a value is an Error object.
The module has JS functions to check all imports or required modules and check if the file is a ES Module or a CJS/ JS Module or Script
- require
- cache
- uncache
- uncached
- module
- fresh
- fetch
- all
- imports
- requires
- es imports
- cjs import
- cjs require
- mjs import
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Extended JavaScript Type Validator
A little library for asserting types and values.
- type
- types
- type-check
- type-checking
- duck-typing
- arguments
- parameters
- values
- data
- contract
- assert
- check
- verify
- safe
Detect the archive type of a Buffer/Uint8Array
Javascript checking library
List of all javascript types. Used and useful for checking, validation, sanitizing and testing. Like isStream, isPromise, isWeakset and etc.
- bool
- boolean
- buffer
- check
- checking
- error
- is
- is-boolean
- is-buffer
- is-error
- is-promise
- is-stream
- json
- kind
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Test if a value is a regular expression.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- valid
- validate
- regular expression
- regexp
- regex
- is
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A small parameter validation library
This module is small but easy to use. The purpose of this module is to check if what type a variable is the typeof command has a few limitations it can tell you if a variable is one of the following: array, NaN, declared or null. Another advantage this mo
Test if a double-precision floating-point numeric value is negative zero.
- stdlib
- stdmath
- assertion
- assert
- utilities
- utility
- utils
- util
- math
- mathematics
- ieee754
- floating-point
- float
- number
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Test if a finite double-precision floating-point number is an integer.
👺 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
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