html - 如何从最后一行的元素中删除边框？

Question

我的布局是这样的(我正在输入一个带有内联样式而不是类的简化版本)

.qa {
  border-bottom: 1px solid #ccc;
}

<div style="display: flex; flex-wrap: wrap; flex-direction: row">
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" style="width:50%;">
    <div>Question</div>
    <div>Answer</div>
  </div>
</div>

这基本上呈现了这样的东西:

我的问题是:

如何去掉最后一行的边框？

Answer 1

您可以为您的元素添加负底部边距，然后 overflow hidden 。这将隐藏不需要的边框。

.qa {
  border-bottom: 1px solid #ccc;
  margin-bottom:-1px;
  margin-top:1px; /*to rectify the bottom margin, we can also consider padding-bottom*/
  
  /*irrelevant styles*/
  padding: 5px;
  margin-left:5px;
  margin-right:5px;
  box-sizing: border-box;
  flex:1 1 40%;
}

.wrapper {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  overflow:hidden;
}

<div class="wrapper">
  <div class="qa">
    <div>Question</div>
    <div>Answer<br>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer<br>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa">
    <div>Question</div>
    <div>Answer<br>Answer</div>
  </div>
</div>

即使一行中的元素数量不是 2，这个技巧也应该有效:

.qa {
  border-bottom: 1px solid #ccc;
  margin-bottom:-1px;
  margin-top:1px;
  
  
  /*irrelevant styles*/
  padding: 5px;
  margin-left:5px;
  margin-right:5px;
  box-sizing: border-box;
  flex:1 1 20%;
}

.wrapper {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  overflow:hidden;
}

<div class="wrapper">
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer<br> answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer<br> answer</div>
  </div>
</div>

它也适用于响应式布局，其中列数可以在小屏幕上改变:

.qa {
  border-bottom: 1px solid #ccc;
  margin-bottom:-1px;
  margin-top:1px;
  
  
  /*irrelevant styles*/
  padding: 5px;
  margin-left:5px;
  margin-right:5px;
  box-sizing: border-box;
  flex:1 1 20%;
}

.wrapper {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  overflow:hidden;
}

@media all and (max-width:800px) {
  .qa {
    flex:1 1 30%;
  }
}

@media all and (max-width:400px) {
  .qa {
    flex:1 1 40%;
  }
}

<div class="wrapper">
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer<br> answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer</div>
  </div>
  <div class="qa" >
    <div>Question</div>
    <div>Answer<br> answer</div>
  </div>
</div>