在打字稿中创建某种类型的变量

Question

I am trying to create variable in my component of certain type like below.

myrequest.model.ts
export class MyRequest {
    public endValue: string;
    public yearEnd: string;
}

In my component i import the above and do like below

myReqObj: MyRequest;

But if i try to do like

this.myReqObj.endValue = '23'

it trows a error like myReqObj is undefined. Am i doing the right way? What is the right way to do this.

Answer 1

Looks like you need to instantiate MyRequest. If you add a constructor, you can do this:

myReqObj: MyRequest = new MyRequest(null, null);
this.myReqObj.endValue = '23'

Answer 2

You should be defining the value as

this.myReqObj ={
      endValue : '23'
}

Updated : Use interface for custom types like these.

export interface MyRequest {
    endValue: string;
    yearEnd: string;
}