如何在 flex 布局中换行?

How to break line in a flex layout?

我有第一个、第二个和第三个项目,然后我希望第四个项目转到下一行,无论 space 有多宽。

.box {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-around;
  align-items: flex-start;
}
.it {
  max-width: 420px;
}
<div class="box">
  <div class="it">1</div>
  <div class="it">2</div>
  <div class="it">3</div>
  <div class="it">4</div>
</div>

可以在合适的位置插入宽伪元素:

.flex-container {
  display: flex;
  flex-wrap: wrap;
}
.flex-container::after {
  content: '';
  width: 100%;
}
.flex-item:last-child { /* or `:nth-child(n + 4)` */
  order: 1;
}
<div class="flex-container">
  <div class="flex-item">1</div>
  <div class="flex-item">2</div>
  <div class="flex-item">3</div>
  <div class="flex-item">4</div>
</div>

我已经解决了这个问题:

.flex-container{
    display:flex;
    flex-direction:column;
    /* how you want your lines */
    text-align:center;
}

<div class="flex-container">
    <p>Line1</p>
    <p>Line2</p>
</div>