javascript - 如何管理 bootstrap 4 网格？

Question

其实我有两个方面，比如 col-md-6 & col-md-6 &我有六个images在左侧和右侧我只需要一个 images就像下面给出的代码。
这工作正常，但当右侧图像不可用时，我需要全宽扩展左六列。我怎么能做到这一点？

<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，我想要像下面给出的代码 col-md-6将不可用:-

<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>

答案将不胜感激!

Answer 1

替换 col-6与 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>