44 packages found
Get the native type of a value.
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
Returns true if the value is an object and not an array or null.
Type check values
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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Check if something is a promise
Determine if an ndarray data type can be safely cast to, or is of the same kind as, another ndarray data type.
A proper typeof that works with primitives, built-in value objects and those from other execution contexts.
Functions to create, process and test objects, maps, arrays, sets
Coalesce for JavaScript. Returns the first value that is not undefined or null.
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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typyts is a library to safely access nested object.
A thin wrapper for fs to group files by type
Bindings for Kind's implementation of RLP encoding.
A collection of utilities dealing with object
- check
- is
- is-object
- isobject
- to-object
- toobject
- javascript
- kind
- kind-of
- object
- type
- typeof
- instanceof
- value
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Minimal JavaScript type checking library
Good judgment of object type.
Returns true if the value is a number. comprehensive tests.Study from jonschlinkert/is-number