html - 两行或多行显示柔性

Question

我想让我自己的元素选项卡创建 4 个 div 并给它们 display:flex和align-items:center一切正常，但我想制作例如 12 div 和 3 列，所以第一列将是 4 div 第二个 4 和第三个 4

#projects #projects {
    display: flex;
    align-items: center;
    margin-top:15px;
    justify-content: center;
}
#projects div{
    width:200px;
    height:170px;
    background: red;
    display: inline-block;
    margin:0 auto;
}

<div id="projects">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <!-- I want 8 more divs but when I add it they are all in one column -->
</div>

Answer 1

您可以通过调整 flex 元素的宽度来控制列数

结果

#projects {
  display: flex;
  flex-wrap: wrap; /* row wrapping*/
  align-items: center;
  margin-top: 15px;
  justify-content: center;
}

#projects div {
  width: calc((100% - 40px) / 4); /* 4 items in row (with 40px for margins) */
  height: 170px;
  background: red;
  display: inline-block;
  margin: 5px;
  border: 1px solid #fff;
  box-sizing: border-box;
}

<div id="projects">
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
  <div>lorem</div>
</div>