CSS 网格，空行仍然会增加间隙

Question

我有一个 CSS grid，有时并非所有元素都被使用。在实际用例中，我使用的是grid输入小部件，其中可能有额外的帮助文本或错误放入特定的grid-area. 我遇到的问题是grid-gap，如果该行为空，它仍然应用间隙。这会导致底部出现双行间隙。有没有办法禁止显示空行之间的间隙？

我一直面临这个问题，它使得网格间隙对我来说无法使用，所以通常我不使用网格间隙，而是使用更复杂的边距设置。

.parent {
  background: gray;
  padding: 16px;
  margin: 16px;
  display: grid;
  grid-template-columns: 64px 128px;
  grid-template-areas:
"childa childb"
"childc childd"
"childe childf";
  grid-gap: 16px;
}

[class^="child"] {
  background-color: red;   
}

.childa { grid-area: childa }
.childb { grid-area: childb }
.childc { grid-area: childc }
.childd { grid-area: childd }
.childe { grid-area: childe }
.childf { grid-area: childf }

<p>Grid gap is okay if all cells filled:</p>
<div class="parent">
  <span class="childa">cell A</span>
  <span class="childc">cell C</span>
  <span class="childb">cell B</span>
  <span class="childe">cell E</span>
  <span class="childf">cell F</span>
  <span class="childd">cell D</span>
</div>
<p>Note the double gap at the bottom due to the empty row:</p>
<div class="parent">
  <span class="childa">cell A</span>
  <span class="childb">cell B</span>
  <span class="childd">cell D</span>
</div>

Answer 1

不要定义区域，而是定义位置：

.parent {
   background: gray;
   padding: 16px;
   margin: 16px;
   display: grid;
   grid-gap: 16px;
}
[class^="child"] {
   background-color: red;   
}
.childa { grid-area: 1/1 } /* row / column */
.childb { grid-area: 1/2 }
.childc { grid-area: 2/1 }
.childd { grid-area: 2/2 }
.childe { grid-area: 3/1 }
.childf { grid-area: 3/2 }
.childg { grid-area: 4/1 }

<div class="parent">
<span class="childa">cell A</span>
<span class="childc">cell C</span>
<span class="childb">cell B</span>
<span class="childe">cell E</span>
<span class="childf">cell F</span>
<span class="childd">cell D</span>
</div>

<div class="parent">
<span class="childa">cell A</span>
<span class="childb">cell B</span>
<span class="childd">cell D</span>
</div>

也像下面这样：

.parent {
   background: gray;
   padding: 16px;
   margin: 16px;
   display: grid;
   grid-auto-flow:dense; /* don't forget this */
   grid-gap: 16px;
}
[class^="child"] {
   background-color: red;   
}
.childa,
.childc,
.childe { grid-column: 1 } 

.childb,
.childd,
.childf { grid-column: 2 }

<div class="parent">
<span class="childa">cell A</span>
<span class="childc">cell C</span>
<span class="childb">cell B</span>
<span class="childe">cell E</span>
<span class="childf">cell F</span>
<span class="childd">cell D</span>
</div>

<div class="parent">
<span class="childa">cell A</span>
<span class="childb">cell B</span>
<span class="childd">cell D</span>
</div>

<div class="parent">
<span class="childa">cell A</span>
<span class="childb">cell B</span>
<span class="childf">cell F</span>
</div>