css – 如何在flex列换行布局中启动一个新列

我希望我的数据按列排列(从上到下,从左到右),数据中的每个标题都应该开始一个新的列.有三个限制：

>必须使用flex(我需要使用特定于flex的功能)

>无法对数据进行分组(例如,将所有数据项包含在一个div内)

>无法设定固定高度

我的问题是如何在flex-flow：列换行布局中强制列中断？

.grid {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
}
.grid .head {
  width: 25%;
  background: orange;
  border-bottom: thin dotted;
}
.grid .data {
  width: 25%;
  background: yellow;
  border-bottom: thin dotted;
}
/* my attempt to solve this */
.grid {
  height: 76px;
}

<div class="grid">
  <div class="head">Column 1 (3 items)</div>
  <div class="data">item 1-1</div>
  <div class="data">item 1-2</div>
  <div class="data">item 1-3</div>
  <div class="head">Column 2 (4 items)</div>
  <div class="data">item 2-1</div>
  <div class="data">item 2-2</div>
  <div class="data">item 2-3</div>
  <div class="data">item 2-4</div>
  <div class="head">Column 3 (2 items)</div>
  <div class="data">item 3-1</div>
  <div class="data">item 3-2</div>
  <div class="head">Column 4 (1 items)</div>
  <div class="data">item 4-1</div>
</div>

：

A break is forced wherever the CSS2.1  07001/07002 [CSS21] or the CSS3  07003/07004 [CSS3-BREAK] properties specify a  fragmentation break.

在撰写本文时,大多数浏览器都会错误地实现* -break- *属性,或者根本不实现它们.在此之前考虑这个答案.

以下演示工作原理：

> FF33

.grid {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
}
.grid .head {
  width: 25%;
  background: orange;
  border-bottom: thin dotted;
}
.grid .data {
  width: 25%;
  background: yellow;
  border-bottom: thin dotted;
}
/* force column breaks */
.grid .head:nth-child(n + 2) {
  page-break-before: always; /* FF33 */
}

<div class="grid">
  <div class="head">Column 1 (3 items)</div>
  <div class="data">item 1-1</div>
  <div class="data">item 1-2</div>
  <div class="data">item 1-3</div>
  <div class="head">Column 2 (4 items)</div>
  <div class="data">item 2-1</div>
  <div class="data">item 2-2</div>
  <div class="data">item 2-3</div>
  <div class="data">item 2-4</div>
  <div class="head">Column 3 (2 items)</div>
  <div class="data">item 3-1</div>
  <div class="data">item 3-2</div>
  <div class="head">Column 4 (1 items)</div>
  <div class="data">item 4-1</div>
</div>