angular/adev/shared-docs/components/tab-group/tab-group.component.html

<div role="tablist" class="docs-tab-list">
  @for (tab of computedTabs(); track tab.tabId) {
    <button
      [id]="tab.tabId"
      role="tab"
      class="docs-tab"
      [class.docs-tab-active]="tab.tabId === selectedTab()"
      [aria-selected]="tab.tabId === selectedTab()"
      [aria-controls]="tab.tabPanelId"
      (click)="selectedTab.set(tab.tabId)"
    >
      {{ tab.label }}
    </button>
  }
</div>

@for (tab of computedTabs(); track tab.tabId) {
  <div
    [id]="tab.tabPanelId"
    role="tabpanel"
    class="docs-tab-panel"
    [attr.aria-labelledby]="tab.tabId"
    [hidden]="tab.tabId !== selectedTab()"
    #tabpanel
  ></div>
}