angular-docs-cn/public/docs/_examples/cb-dynamic-form/ts/app/question-dropdown.ts

// #docregion
import { QuestionBase } from './question-base';

export class DropdownQuestion extends QuestionBase<string>{
  controlType = 'dropdown';
  options:{key:string, value:string}[] = [];

  constructor(options:{} = {}){
    super(options);
    this.options = options['options'] || [];
  }
}