Search results
110 packages found
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
- View more
Type check values
Enhances a JavaScript class by adding an is<Class> property to compare types between realms.
A tiny javascript type testing tool
Tests to see if the prototype property of a constructor appears anywhere in the prototype chain of an value.
- instanceof
- instof
- inst-of
- instance-of
- is-instance
- is-instance-of
- instances
- classof
- class-of
- kind
- is-kind
- is-kind-of
- constructor
- memberof
Define errors without frills, but with stack traces and instanceof support.
Determine the name of a value's constructor.
Get the type of something. Seriously.
Test if a value is a regular expression.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- valid
- validate
- regular expression
- regexp
- regex
- is
- View more
Check if a value is an `Error` instance
- browser
- cross-realm
- dom
- error
- error-handle
- error-handler
- error-handlers
- error-handling
- error-monitoring
- error-reporting
- errors
- exception
- exception-handling
- instanceof
- View more
Create custom JavaScript errors that also match instanceof.
Extended JavaScript Type Validator
Get the type of something. Seriously.
Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.
- stdlib
- stdutils
- stdutil
- utilities
- utility
- utils
- util
- prototype
- inherit
- inherits
- class
- oop
- object-oriented
- inheritance
- View more
compare the type of your value with one or several types
- typeof
- types
- instanceof
- type-of
- test
- check
- typeof-in
- string
- constructor
- name
- number
- object
- array
- function
- View more
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
- View more
Allows runtime-check that object implements an interface (missing functionality in TypeScript)
get the type of a javascript object.
Validate the type of object's properties.