Tips for instantiating a class with another class as a variable?

When using typescript, I am passing an entire class as a reference MyClass to a function. How can I create a new instance of that class within the function?

export class MyClass {
}

createClass(MyClass);

function createClass(classReference) {
   const classInstance = new classReference();//this method is not working
}

This functionality is required because in Angular's ModuleWithProviders, it is not possible to invoke new MyClass().

Answer №1

This example demonstrates how to create a generic function in TypeScript:

function createClass<T>(classReference: { new (): T }): T {
   return new classReference();
}

let instance = createClass(MyClass); // instance is now of type MyClass

(View code in playground)

Answer №2

To enhance your ModuleWithProviders, consider implementing the following:

{ provide: ProviderToSwitchOut, useClass: NewClassInstance }

Explore further details here

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