@produck/is-sub-constructor

Check if a constructor is a sub-constructor (derived class) of another.

Installation

npm install @produck/is-sub-constructor

Usage

import { isSubConstructor } from "@produck/is-sub-constructor";

class Animal {}
class Dog extends Animal {}
class Bulldog extends Dog {}

isSubConstructor(Dog, Animal); // true
isSubConstructor(Bulldog, Animal); // true
isSubConstructor(Animal, Animal); // false
isSubConstructor(Animal, Dog); // false
isSubConstructor(123, Animal); // false
isSubConstructor(Array, Object); // true

API

isSubConstructor(value, base)

Returns true if value is a sub-constructor (derived class) of base, false otherwise.

• value unknown - The value to check.
• base constructor - The base constructor to check against.
• Returns boolean
• Throws TypeError - If base is not a constructor.

License

MIT