如何确定display：table-cell的填充

Question

我正在尝试采用类似于表格的布局，药物名称显示在左侧，数据占据了表格的其余部分。简单的说：

           +-------------+------------+
medicine 1 |  some data  | some data  |
           +-------------+------------+
medicine 2 |  some data  | some data  |
           +-------------+------------+

由于我想保持数据网格的动态性，因此我<div>将样式display:table-cell为2的两个容器用作两个容器，左边的一个用于所有药物名称，右边的​​一个用于数据网格。<div>在这两个表格单元中有多个内部单元<div>，但是我不确定为什么当我使用Chrome inspect接口进行调查时，左侧的单元顶部为何有较大的填充区域（请参见下图）：

我不太确定哪一部分出错了，并且inspect接口没有给我看似相关的信息。我想学习如何处理这种情况。这是供您参考的html代码：

           +-------------+------------+
medicine 1 |  some data  | some data  |
           +-------------+------------+
medicine 2 |  some data  | some data  |
           +-------------+------------+

Answer 1

这是关于垂直对齐。默认值设置为基线并产生此输出。只需将对齐方式更改为top，table-cell就不会出现此问题：

<div style="display:table">
  <div style="display:table-row">
    <div style="display:table-cell;
    vertical-align: top;">
      <div style="height:85px; width:170px; text-align:right; font-size:13px; margin-right:5px">
        Dexedrine Spansules (Dextroamphetamine, ER) <br/><span style="font-style:italic">(20mg)</span>
      </div>
      <div style="height:85px; width:170px; text-align:right; font-size:13px; margin-right:5px">
        Methamphetamine (Desoxyn, IR) <br/><span style="font-style:italic">(15mg)</span>
      </div>
    </div>
    <div style="display:table-cell;
    vertical-align: top; overflow:hidden; max-width:800px">
      <div id="medicine_table_container_2" class="medicine-table-container" style="position:relative; left:0">
        <div style="white-space:nowrap; font-size:0px">
          <div style="display:inline-block; background-color:yellow; width:130px; height:85px; border:1px solid #999; font-size: 12px; white-space:normal">
            <div>
              <div style="display:inline-block; width:70px; height:45px">
                Morning<br/>-
              </div>
              <div style="display:inline-block; width:50px; height:45px">
                Noon<br/>5mg
              </div>
            </div>
            <div>
              <div style="display:inline-block; width:70px; height:35px">
                Afternoon<br/>12mg
              </div>
              <div style="display:inline-block; width:50px; height:35px">
                Evening<br/>-
              </div>
            </div>
          </div>
        </div>
        <div style="white-space:nowrap; font-size:0px">
          <div style="display:inline-block; background-color:yellow; width:130px; height:85px; border:1px solid #999; font-size: 12px; white-space:normal">
            <div>
              <div style="display:inline-block; width:70px; height:45px">
                Morning<br/>-
              </div>
              <div style="display:inline-block; width:50px; height:45px">
                Noon<br/>5mg
              </div>
            </div>
            <div>
              <div style="display:inline-block; width:70px; height:35px">
                Afternoon<br/>12mg
              </div>
              <div style="display:inline-block; width:50px; height:35px">
                Evening<br/>-
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

由于您的代码有点复杂，因此这里有一个基本的代码可以重现此问题并更好地了解发生了什么：

.table {
  display: table;
  border: 1px solid;
  margin: 5px;
}

.table>div {
  display: table-row;
}

.table>div>span {
  display: table-cell;
  padding: 0 5px;
}

.table>div>span span {
  display: inline-block;
}

baseline
<div class="table">
  <div>
    <span>one line</span>
    <span><span>two <br> line (inline-block)</span></span>
  </div>
</div>
baseline
<div class="table">
  <div>
    <span>two<br> line</span>
    <span><span>two <br> line (inline-block)</span></span>
  </div>
</div>
baseline (with overflow:hidden)
<div class="table">
  <div>
    <span>one line</span>
    <span><span style="overflow:hidden;">two <br> line</span></span>
  </div>
</div>
baseline (with overflow:hidden)
<div class="table">
  <div>
    <span>one line</span>
    <span><span style="overflow:hidden;">another line</span></span>
  </div>
</div>
top will fix all the cases
<div class="table">
  <div>
    <span style="vertical-align:top;">one line</span>
    <span><span>two <br> line</span></span>
  </div>
</div>
<div class="table">
  <div>
    <span style="vertical-align:top;">one line</span>
    <span><span style="overflow:hidden;">two <br> line</span></span>
  </div>
</div>
<div class="table">
  <div>
    <span style="vertical-align:top;">one line</span>
    <span><span style="overflow:hidden;">another line</span></span>
  </div>
</div>
<div class="table">
  <div>
    <span style="vertical-align:top;">two<br> line</span>
    <span><span>two <br> line (inline-block)</span></span>
  </div>
</div>

您可以在这里清楚地看到inline-block（和overflow:hidden）的使用原因，因为它使基准计数器的计算直观而出乎意料。