是否有“类"的类型?在打字稿?并且“任何"包括它? [英] Is there a type for "Class" in Typescript? And does "any" include it?

问题描述

在 Java 中，您可以使用Class"类型将方法的类作为参数.我在打字稿文档中没有找到任何类似的东西 - 是否可以将类传递给方法?如果是，any"类型是否包括此类类类型?

In Java, you can give a class to a method as a parameter using the type "Class". I didn't find anything similar in the typescript docs - is it possible to hand a class to a method? And if so, does the type "any" include such class-types?

背景:我在使用 Webstorm 时遇到问题，告诉我我无法在 Angular 2 中将类移交给 @ViewChild(...).但是，Typescript 编译器没有抱怨.@ViewChild() 的签名好像是"Type | Function | string"，所以不知道有没有包含类.

Background: I'm having an issue with Webstorm, telling me that I cannot hand over a class to @ViewChild(...) in Angular 2. However, the Typescript compiler does not complain. The signature of @ViewChild() seems to be "Type<any> | Function | string", so I wonder if any includes Classes or not.

推荐答案

你在打字稿中要求的等价物是类型 { new(): Class }，例如:>

The equivalent for what you're asking in typescript is the type { new(): Class }, for example:

class A {}

function create(ctor: { new(): A }): A {
    return new ctor();
}

let a = create(A); // a is instanceof A

(代码在操场上)

上面的代码将只允许构造函数没有参数的类.如果你想要任何类，使用 new (...args: any[]) =>类

The code above will allow only classes whose constructor has no argument. If you want any class, use new (...args: any[]) => Class

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