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75 packages found
Check if the required properties are set, the easy way!
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
Check if `this` is truthy.
Validation utilities.
- validate.io
- validator
- validation
- validate
- valid
- is
- isvalid
- check
- typed
- assert
- expect
- api
- string
- primitive
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Check if a given value is empty in JS extending his "truthy" and "falsy" nature
Utilities and types to help with simple Boolean checks
Check if a given object is null or empty
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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All imaginable type checking utils with their negation
checks if foo is not defined, i.e. undefined, null, an empty string, array, object or NaN
This module is small but easy to use. The purpose of this module is to check if a value is a array but if it is not an array it will convert the value into an array.
exists and allExist functions. plain and simple
2 functions that check if argument is undefined or null
Used to check if some of the arguments are null or undefined.
Monadic library to help with Typescripts --strictNullChecks
Perform easy type-checks with a simple type assertion.
- perform
- easy
- type-checks
- simple
- type
- assertion
- constructors
- expected
- type's
- accepted
- constructor
- null
- evaluate
- asserttype
Checks whether a given string is null or empty in Javascript (node).
Nullish checker
checks if foo is not defined, i.e. undefined, null, an empty string, array, object or NaN
Type safe variable checks