javascript - 如何管理Bootstrap 4网格？

Question

我有两侧，例如 col-md-6 和 col-md-6，并且左侧和右侧有六个图像边。我只需要一张图像，如下面的代码所示。

这工作正常，但当右侧图像不可用时，我需要全宽展开左六列。我该如何处理这个问题？

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>


<div class="container">
    <div class="row">
    <div class="col-6">
    <div class="row">
      <div class="col-4" style="background-color:yellow;">img</div>
      <div class="col-4" style="background-color:orange;">img</div>
      <div class="col-4" style="background-color:blue;">img</div>
      <div class="col-4" style="background-color:red;">img</div>
      <div class="col-4" style="background-color:lime;">img</div>
      <div class="col-4" style="background-color:indianred;">img</div>
    </div>
      </div>
          <div class="col-6 p-0">
      <div class="col-12" style="background-color:green; height:48px;">img</div>
</div>
    </div>

</div>

如果正确的col-md-6不可用，我想要像下面给出的代码:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>


<div class="container">
    <div class="row">
    <div class="col-12">
    <div class="row">
      <div class="col-2" style="background-color:yellow;">img</div>
      <div class="col-2" style="background-color:orange;">img</div>
      <div class="col-2" style="background-color:blue;">img</div>
      <div class="col-2" style="background-color:red;">img</div>
      <div class="col-2" style="background-color:lime;">img</div>
      <div class="col-2" style="background-color:indianred;">img</div>
    </div>
      </div>
    </div>

</div>

我该如何解决这个问题？

Answer 1

将 col-6 替换为 col

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>


<div class="container">
    <div class="row">
    <div class="col">
    <div class="row">
      <div class="col-4" style="background-color:yellow;">img</div>
      <div class="col-4" style="background-color:orange;">img</div>
      <div class="col-4" style="background-color:blue;">img</div>
      <div class="col-4" style="background-color:red;">img</div>
      <div class="col-4" style="background-color:lime;">img</div>
      <div class="col-4" style="background-color:indianred;">img</div>
    </div>
      </div>
          <div class="col p-0">
      <div class="col-12" style="background-color:green; height:48px;">img</div>
</div>
    </div>

</div>