I've a `Util.ts` which will have all the API endpoints. 

In my component will import the `Api` class and make use of the API's.

Now, One of the API endpoint is having dynamic values, that I need to append to the URL. 

**Utils.ts**

```
export class Api {
    public static PROGRESS_ISSUE = 'https://xxx/rest/api/2/search?jql=project%20%3D%2025764%20AND%20status%20%3D%20%22In%20Progress%22&fields=id,key,status,project&maxResults=100'
}

```

In the above, I wanted to make the `project` & `status` as dynamic values which I'll be passing in the service. 

**Service.ts**

```
import { Api } from './api/utils'; 

  getJiraOpenIssues(id: number, status:string) {
    return this.http.get<any>( Api.PROGRESS_ISSUE )
    .subscribe(count => console.log(count.total));
  }

```