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127 packages found
Retrieve the real type of a variable, a more accurate version of the `typeof` operator. This module has been improved for performance and is getting better overtime.
Test if a value is an array-like object containing only nonnegative integers.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- typed
- array
- typed array
- is
- istypedarray
- istyped
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check whether value is undefined or empty or null
- validation-checking
- validation checking
- validation
- data validation
- object empty checking
- array empty checking
- isArrayEmpty
- isEmptyArray
- isObjectEmpty
- isEmptyObject
- is array
- is object
- is number
- is boolean
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Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
- array
- assert
- assertion
- async
- async function
- async-function
- asyncFunction
- bool
- boolean
- browser
- check
- check-type
- checking
- class
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Validates if a value is a number.
Curried TypeScript type guards for primitive types and classes
- TypeScript
- type guards
- type
- guard
- isBoolean
- isNumber
- isString
- isSymbol
- isNull
- isUndefined
- isPrimitive
- isNonPrimitive
- is
- isLike
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A collection of useful utility functions with associated TypeScript types. All functions have been unit tested.
- TypeScript
- isNullOrUndefined
- isEmpty
- isEqual
- isNumber
- randomNumberBetweenRange
- random number between range
- asyncForEach
- async for each
- delay
- convertTimeUnits
- convert time units
- getToday
- setEndOfDay
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The fast and reliable JS type-checking toolbox!
- type
- utils
- javascript
- typechecking
- isArray
- isArrayLike
- isBoolean
- isFunction
- isNull
- isNumber
- isObject
- isObjectLike
- isPlainObject
- isString
- View more
The ts-is-number a utility npm package that checks if a given input is a valid finite number or a string that can be converted to a valid finite number.
Check if the given value is of a specific type.
- check
- type
- typeof
- isArray
- isNumber
- isObject
- isNull
- isUndefined
- isNil
- isBoolean
- isString
- array
- number
- object
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Small utility to check variable types
- typechecker
- typeverifier
- types
- type
- check
- gettype
- isstring
- isregexp
- isregex
- isobject
- iserror
- isnumber
- isdate
- isarray
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@mozeyinedu/check is a package that contains functions that check some conditions just to preserve time for other stuff
This library provides next util: isBoolean, isFunction, isNumber, isNumbers, isObject and isString, function can be object, number can not be NaN.
Test if a value is an array-like object containing only integers.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- typed
- array
- typed array
- is
- istypedarray
- istyped
- View more
Collection of methods for check
- isArray
- isBoolean
- isDate
- isFunction
- isNull
- isNumber
- isObject
- isString
- isUndefined
- isElement
- isEmpty
- isEmail
- isNaN
- isRegExp
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Test whether a string contains only numeric digits.
Test if a value is an array-like object containing only positive integers.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- typed
- array
- typed array
- is
- istypedarray
- istyped
- View more
Useful simple functions.
- usf
- useful
- simple
- functions
- capitalize
- sanitize-and-capitalize
- capitalize-first
- sanitize
- reverse
- isNull
- isNotNull
- isEmpty
- isNotEmpty
- isBlank
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Quickly identify standard JavaScript types
ES6 Component for validations.