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896 packages found
Test if a value is a number having a finite negative value.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- negative
- is
- isnumber
- isnumeric
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Test if a value is an empty array-like object.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- array
- array-like
- empty
- is
- isarraylike
- object
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Test if a value is a plain object containing a circular reference.
Test if a value is equal to negative zero.
Test if a value is equal to positive zero.
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
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Test if a value is a prime number.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- integer
- int
- prime
- primality
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Test if a value is a triangular number.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- triangular
- triangle
- binomial
- binomcoef
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Test if a value is an infinite number.
Test if a value is a JavaScript boxed primitive.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- valid
- primitive
- object
- string
- number
- boolean
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Test if a value is a number having a finite positive value.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- positive
- is
- isnumber
- isnumeric
- View more
Test if a value is an array-like object containing only Date objects.
Test if a value is a composite number.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- integer
- int
- composite
- prime
- View more
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- parents
- stable
- es2017
- jsdom
- formatting
- setPrototypeOf
- 256
- import
- functions
- middleware
- ECMAScript 2016
- classname
- css less
- keys
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Minimal JavaScript type checking library
Test if a value is generator object-like.
Test if a value is a generator object.
Test if a value is a square triangular number.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- triangular
- triangle
- binomial
- binomcoef
- View more
Type safe assertions that work just as well in production run-times as they do in testing.
Test if two arguments have the same native class.