一个类作为角度打字稿中的接口

Question

In a component he uses something like:

Method (Obj: MyClass) { .... }

It's a shorthand for Obj = new MyClass ?

And if in the constructor of MyClass there is an argument needed, this should be Obj = new MyClass (argument) ? and the Obj: MyClass , still works?

Answer 1

It's a shorthand for Obj = new MyClass ?

No, it is not. It only specifies that Method receives an argument ( Obj reference inside the method) of type MyClass . It means the argument passed to Method must be an instance of MyClass .

Example of correct usage of Method :

const ob = new MyClass(); // supose `MyClass` constructor does NOT requieres any argument
Method(ob);

Example of incorrect usage of Method :

Method();