嵌套 CSS-grid 隐式填充父网格的剩余高度

Question

我正在尝试让子 CSS-grid 尊重父网格的尺寸。我怎样才能做到这一点？

我最初是这样写的：

.site,
body,
html {
  padding: 0;
  margin: 0;
  height: 100%;
  width: 100%;
}

.parent-grid {
  display: grid;
  height: 300px;
  width: 300px;
  grid-template-rows: 30px 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'nav' 'child';
  background-color: grey;
}

.nav {
  background-color: #0D47A1;
  grid-area: nav;
}

.child {
  grid-area: child;
}

.child-grid {
  display: grid;
  grid-template-rows: 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'test';
  background-color: grey;
}

.content {
  background-color: red;
  overflow: auto;
  grid-area: test;
}

* {
  box-sizing: border-box;
}

<div class="parent-grid">
  <div class="nav">Sidebar</div>
  <div class="child">
    <div class="child-grid">
      <div class="content">
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
      </div>
    </div>
  </div>
</div>

我想让 'content' 成为一个不会扩展父级高度的可滚动区域（因此它应该是“270px”）。

Answer 1

好吧，给你的子网格一个专用的高度：

height: 240px;

并设置

overflow: auto;

所以，确实，身高是有保障的。如有必要，将出现滚动条。不确定 css 网格的最新功能是否真的是这里使用的最佳选择。你可能想看看 flexbox：https://codepen.io/fnocke/details/RxMKOK

或者——甚至更兼容——你确实可以坚持使用正常的 display: block;。只要指定高度并设置溢出，就可以了。

Answer 2

网格项（.child）默认给出min-height: auto。将 min-height: 0 应用于 .child 以否决此。

然后将 height: 100% 添加到 .child-grid 并将 overflow: auto 添加到 content...

.site,
body,
html {
  padding: 0;
  margin: 0;
  height: 100%;
  width: 100%;
}

.parent-grid {
  display: grid;
  height: 300px;
  width: 300px;
  grid-template-rows: 10vh 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'nav' 'child';
  background-color: grey;
}

.nav {
  background-color: #0D47A1;
  grid-area: nav;
}

.child {
  grid-area: child;
  min-height: 0;
}

.child-grid {
  display: grid;
  grid-template-rows: 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'test';
  background-color: grey;
  height: 100%;
}

.content {
  background-color: red;
  overflow: auto;
  grid-area: test;
}

* {
  box-sizing: border-box;
}

<div class="parent-grid">
  <div class="nav">Sidebar</div>
  <div class="child">
    <div class="child-grid">
      <div class="content">
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
      </div>
    </div>
  </div>
</div>

Answer 3

这是一个快速简单的解决方案，无需更改您的 HTML。只需将此添加到您的代码中：

.child { 
   overflow: auto;
}

这会覆盖网格项目的 min-height: auto 默认设置，允许它们缩小到其内容的大小以下并创建溢出条件。

这里有完整的解释：

.site,
body,
html {
  padding: 0;
  margin: 0;
  height: 100%;
  width: 100%;
}

.parent-grid {
  display: grid;
  height: 300px;
  width: 300px;
  grid-template-rows: 30px 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'nav' 'child';
  background-color: grey;
}

.nav {
  background-color: aqua;
  grid-area: nav;
}

.child {
  grid-area: child;
  overflow: auto;   /* NEW */
}

.child-grid {
  display: grid;
  grid-template-rows: 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: 'test';
  background-color: grey;
}

.content {
  background-color: red;
  overflow: auto;
  grid-area: test;
}

* {
  box-sizing: border-box;
}

<div class="parent-grid">
  <div class="nav">Sidebar</div>
  <div class="child">
    <div class="child-grid">
      <div class="content">
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
        <div>blah</div>
      </div>
    </div>
  </div>
</div>

或者，而不是你这里的：

.parent-grid {
  display: grid;
  height: 300px;
  grid-template-rows: 30px 1fr;
}

试试这个：

.parent-grid {
  display: grid;
  grid-template-rows: 30px 270px;
}

.content {
  overflow: auto;
  height: 100%;
}

我还删除了一个似乎没有必要的额外容器 (.child-grid)。

.site,
body,
html {
  padding: 0;
  margin: 0;
  height: 100%;
  width: 100%;
}

.parent-grid {
  display: grid;
  height: 300px;
  width: 300px;
  grid-template-rows: 30px 270px;
  grid-template-columns: 1fr;
  grid-template-areas: 'nav' 'child';
  background-color: grey;
}

.nav {
  background-color: aqua;
  grid-area: nav;
}

.child {
  grid-area: child;
}

.content {
  background-color: red;
  overflow: auto;
  height: 100%;
}

* {
  box-sizing: border-box;
}

<div class="parent-grid">
  <div class="nav">Sidebar</div>
  <div class="child">
    <div class="content">
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
      <div>blah</div>
    </div>
  </div>
</div>

嵌套 CSS-grid 隐式填充父网格的剩余高度

Nested CSS-grid implicitly fill remaining height from parent grid

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