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296 packages found
high-performance, zero-dependency circular reference check for objects (or arrays)
Test if a value is an object.
Test if a value is a number.
Test if a value is a boolean.
Set of shortands of Object.prototype.toString for fast and simple type check
Test if a value is an array-like object.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- array
- array-like
- is
- isarraylike
- object
- obj
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Determine the specification defined classification of an object.
- stdlib
- stdutils
- stdutil
- utilities
- utility
- utils
- util
- type
- typeof
- native
- class
- classification
- specification
- spec
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Test if a value is a number having a positive integer value.
A robust micro library for type checking. Defers to constructs' internal `[[Class]]` property rather than duck typing for excellent type detection and to avoid triggering false positives.
Test if a value is a number having a nonnegative integer value.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- integer
- int
- nonnegative
- is
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Test if a value is a Buffer object.
A utility to determine if a value is a non-null JavaScript object
Check if an object is empty or not.
Isomorphic, functional type-checking for Javascript
Is the input (plain object, array, string or whatever) not empty?
Test if a value is a number having an integer value.
Checks whether a value is a proxy object
Test if a value is an Error object.
Return a function which tests if every element in an array-like object passes a test condition.
A collection of methods for working with Objects.
- extra
- object
- entry
- hasKey
- key
- length
- subset
- CombineFunction
- CompareFunction
- EndFunction
- Entries
- Lists
- MapFunction
- ProcessFunction
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