使用angular8单击选项卡时如何获取第一个字段的制表符焦点

Question

嗨，我一共有6个标签，基于点击一个标签子标签打开。子选项卡打开后，我希望焦点放在每个选项卡的第一个子选项卡上。我尝试获取第一个选项卡的id，并尝试获取其中的子选项卡id。例如:第一个选项卡是details_basic_info，它的子选项卡包含tab-details_basic_info。因此，我试图使details_basic_info获取，并在此基础上添加“tab -”，并使用动态获取的主选项卡的id，而我未能实现该id的是clicked.But。有人能帮我吗，怎么能做到。

提前谢谢。

演示：演示

Answer 1

如果是我的话，我可能会这样做(虽然方法处理的重复性稍低一些，但是嘿，这只是一个快速的普通js验证，例如，用引导程序结合在一起，但可以很容易地移植到角度)，所以您不关心第一个可聚焦的元素是什么，只要它在数组中提供，就可以聚焦。

希望这有帮助，干杯！

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      }, 0); 
      

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  }
}

notifyOfFailure = () => {
  alert('NO FOCUS FOR YOU!');
}

.tab-content {
  padding: 2rem;
}

.tab-content *:focus {
  outline: red 3px dotted;
}

.tab-content *:focus:after {
  content: '*';
  margin-top: 1rem;
  color: red;
}

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<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
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  <li class="nav-item">
    <a class="nav-link active" data-toggle="tab" href="#panel1" role="tab" onclick="focusFirstFocusableChildPoC('panel1')">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#panel2" role="tab" onclick="focusFirstFocusableChildPoC('panel2')">Profile</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#panel3" role="tab" onclick="focusFirstFocusableChildPoC('panel3')">Contact</a>
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</ul>

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    <button>A Button</button>
    <input type="checkbox">
    <input type="number">
  </div>
  <div class="tab-pane" id="panel2" role="tabpanel">
    <label><input type="checkbox"> Focus testing</label>
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    <button>A Button</button>
    <input type="number">
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    <input type="checkbox">
    <input type="number">
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  <div class="tab-pane" id="panel4" role="tabpanel">
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    <input type="checkbox">
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