Search results
2467 packages found
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
Type check values
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Get the native type of a value.
Check if a value is a plain object
Returns true if the value is an object and not an array or null.
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
- View more
Easily check the structure of any javascript object!
Strong Dynamically Typed Object Modeling for JavaScript
- typed
- types
- typing
- type-checking
- dynamic
- strong
- model
- definition
- object
- assertion
- inheritance
- composition
- structures
- proxy
A simple and composable way to validate data in JavaScript (and TypeScript).
Test if a value is a string.
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
Test if a value is a plain object.
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.
A Node.js library offering functions to check variable types, including arrays, objects, strings, numbers, booleans, and undefined values.
Isomorphic, functional type-checking for Javascript
Test if a value is a boolean.