@litert/utils

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Function getConstructor ​

Source: GetConstructor.ts

Returns the constructor function of an object by reading its prototype chain.

Import ​

ts
import { getConstructor } from '@litert/utils-object';

Signature ​

ts
function getConstructor<T>(obj: T): IConstructor<T>;

Parameters ​

  • Parameter obj: T

    The object whose constructor to retrieve. Must be a non-null object instance.

Return Value ​

The constructor function of obj, typed as IConstructor<T>.

Error Handling ​

  • TypeError — Thrown when obj is null or not an object (i.e., a primitive value).

Examples ​

ts
import { getConstructor } from '@litert/utils-object';

class Animal {}
class Dog extends Animal {}

const dog = new Dog();
console.log(getConstructor(dog) === Dog); // true
console.log(getConstructor(dog) === Animal); // false

// TypeError
getConstructor(null);  // TypeError
getConstructor(42);    // TypeError