Flexbox：带有行距的布局

我的HTML与以下示例类似

<div id="wrapper">
 <div id="a">a</div>
 <div id="b">b</div>
 <div id="c">c</div>
 <div id="d">d</div>
</div>

在桌面上，我希望divs显示在旁边，这当然是微不足道的。

在移动设备上，我希望有类似于以下内容的表格式布局

b，c和d的灵活高度，因此必须适应这一点。

如果没有将b，c和d包装在单独的div中，可以这样做吗？

---

是的，你可以用flexbox 完全做到这flexbox ......当然，你需要在较小的视口尺寸上决定第一个div的宽度，但我认为你已经准备好了所需的媒体查询。

#wrapper {
  height: 100vh;
  width: 90vw;
  border: 1px solid grey;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  margin: 10px auto;
}
#wrapper div {
  flex: 1 0 auto;
  border: 1px solid white;
  background: lightblue;
  text-align: center;
}
#a {
  flex-grow: 1;
  height: 100%;
  flex-basis: 50%;
}
@media screen and (min-width: 640px) {
  #a {
    height: auto;
    flex-grow: none;
    flex-basis: auto;
  }
}

<div id="wrapper">
  <div id="a">a</div>
  <div id="b">b</div>
  <div id="c">c</div>
  <div id="d">d</div>
</div>

---

在需要时只使用flexbox：在桌面版本上：

*    { box-sizing: border-box; }
body { margin: 0; }
#a   { background: tomato; }
#b   { background: forestgreen; }
#c   { background: dodgerblue; }
#d   { background: orange; }

#wrapper {
    overflow: hidden;
    position: relative;
}
#wrapper > div {
    float: left;
    width: 50%;
    margin-left: 50%;
    padding: 5px;
}
#wrapper > #a {
    position: absolute;
    height: 100%;
    margin-left: 0;
}
@media all and (min-width: 768px) {
    #wrapper {
        display: flex;
    }
    #wrapper > div {
        margin-left: 0;
    }
    #wrapper > #a {
        position: relative;
        height: auto;
}

<div id="wrapper">
  <div id="a">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor. Cras elementum ultrices diam. Maecenas ligula massa, varius a, semper congue, euismod non, mi. Proin porttitor, orci nec nonummy molestie, enim est eleifend mi, non fermentum diam nisl.</div>
  <div id="b">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor. Cras elementum ultrices diam. Maecenas ligula massa, varius a, semper congue, euismod non, mi. Proin porttitor, orci nec nonummy molestie, enim est eleifend mi, non fermentum diam nisl sit amet erat. Duis semper. Duis arcu massa, scelerisque vitae, consequat in, pretium a, enim. Pellentesque congue. Ut in risus volutpat libero pharetra tempor. Cras vestibulum bibendum augue. Praesent egestas leo in pede. Praesent blandit odio eu enim. Pellentesque sed dui ut augue blandit sodales. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Aliquam nibh.</div>
  <div id="c">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor. Cras elementum ultrices diam. Maecenas ligula massa, varius.</div>
  <div id="d">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor. Cras elementum ultrices diam. Maecenas ligula massa, varius a, semper congue, euismod non, mi. Proin porttitor, orci nec nonummy molestie, enim est eleifend mi, non fermentum diam nisl sit amet erat. Duis semper.</div>
</div>

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