class Link1Handler {

  constructor(env, headerSpace) {
    Link1Handler.APP_ENV = env;

    const elements = createBtnGroupArea('link-1-action-area', '0,1歳日誌データ連携', this.handleLink, {
      btnElId: 'link-1-btn',
      yearElId: 'link-1-year',
      monthElId: 'link-1-month',
    })
    if (!elements) {
      return;
    }
    headerSpace.appendChild(elements['link-1-action-area']);
  }

  handleLink(e, { year, month }) {
  }

  static getInstance(env, headerSpace) {
    if (!Link1Handler.instance) {
      Link1Handler.instance = new Link1Handler(env, headerSpace);
    }
    return Link1Handler.instance;
  }
}