如何获得流程以正确检查类型所实现的接口？

Question

I have flow code which looks like this. When I flow check I get an error 1: const docs: Array<LeadDoc> = property docType of LeadDoc. Property not found in 1: const docs: Array<LeadDoc> = property docType of LeadDoc. Property not found in

Is this not yet supported in flow?

export interface LeadDoc {
  docType(): string;
}

class Foo {
  docType(): string {
    return 'foo';
  }
}

const docs: Array<LeadDoc> = [
  Foo,
];

Answer 1

docType is a property of instances of Foo , but [Foo] is the singleton array of the statics of Foo . [new Foo] is of the type Array<LeadDoc> .