如何在TypeScript中指定任何可更新的类型? [英] How to specify any newable type in TypeScript?

问题描述

我尝试过此操作，但不起作用. Foo只是对有效方法的测试. Bar是真正的尝试，它应该可以接收任何新类型，但是Object的子类对此无效.

I tried with this but it doesn't work. Foo is just a test of what works. Bar is the real try, it should receive any newable type but subclasses of Object isn't valid for that purpose.

class A {

}
class B {
    public Foo(newable: typeof A):void {

    }
    public Bar(newable: typeof Object):void {

    }
}

var b = new B();
b.Foo(A);
b.Bar(A); // <- error here

推荐答案

您可以使用{ new(...args: any[]): any; }允许带有构造函数且带有任何参数的任何对象.

You can use { new(...args: any[]): any; } to allow any object with a constructor with any arguments.

class A {

}

class B {
    public Foo(newable: typeof A):void {

    }

    public Bar(newable: { new(...args: any[]): any; }):void {

    }
}

var b = new B();
b.Foo(A);
b.Bar(A);  // no error
b.Bar({}); // error

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