Question

我们的应用程序基于类 而不是模块 （参考以下问题和答案：How do I declare a public enum in typescript?）。

以下是代码结构的示例：

// GrandParent.ts
enum DAYS {SUNDAY,MONDAY, TUESDAY, WEDNESDAY, THURSDAY,FRIDAY, SATURDAY};
class GrandParent {
    // Some super cool stuff
} 
export = GrandParent

//Parent.ts
import GrandParent = require('./GrandParent');
class Parent extends GrandParent {
    // Some things even cooler
}
export = Parent

// Child.ts
import Parent = require('./Parent');
class Child extends Parent {
    getMonday():DAYS{           //Could not find symbol 'DAYS'
        return DAYS.MONDAY; 
    }
}
export = Child

当我尝试转换代码时，我在webstorm中收到以下错误：错误TS2095：找不到符号＆＃39; DAYS＆＃39;。

有没有办法以enum格式GrandParent访问Child？

Answer 1

当您说export =时，它是从文件中导出仅事物的声明。

如果要从模块中导出多个内容，请使用多个export声明：

// GrandParent.ts
export enum DAYS {SUNDAY,MONDAY, TUESDAY, WEDNESDAY, THURSDAY,FRIDAY, SATURDAY};
export class GrandParent {
    // Some super cool stuff
} 

//Parent.ts
import GrandParent = require('./GrandParent');
class Parent extends GrandParent.GrandParent {
    // Some things even cooler
}
var x = GrandParent.DAYS.MONDAY;
export = Parent

Answer 2

这是我做的事情

module portal{

 enum DAYS {SUNDAY,MONDAY, TUESDAY, WEDNESDAY, THURSDAY,FRIDAY, SATURDAY};


}


module portal.logic{

 //now in this module you can access enum of parent module no need for require

  export class GrandParent {
// Some super cool stuff
} 


 class Parent extends GrandParent.GrandParent {
// Some things even cooler
 }
}

如何访问父类中的枚举（打字稿）

2 个答案: