CSS 网格的高度大于其容器 div

Question

我正在尝试制作一个网格，但网格总是溢出 div 它在里面。这太简单了，我不明白问题是什么。 div 列有背景颜色，因此您可以看到它的位置，但您也可以在元素检查器中看到它。

我尝试了多种解决方案并在网上查找，但找不到解决方案。以下是我尝试过的方法及其无效的原因：

height:100% 在网格或列上 class 在底部添加了两个空网格单元格
overflow:auto在class栏上制作了一个滚动条
创建底部带有 clear:both 的 <br> 没有做任何事情

.column {
  margin-top: 3%;
  margin-left: 20%;
  margin-right: 20%;
  background-color: rgba(200, 0, 0, 0.1);
}

.grid {
  display: grid;
  grid-template-columns: repeat( auto-fit, minmax(450px, 1fr));
  grid-auto-rows: (0px, 1fr);
  grid-gap: 2%;
}

.plum {
  /* background-color: plum; */
}

.card {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  transition: 0.3s;
  border-radius: 10px;
  background-color: rgba(0, 0, 0, 0.1);
}

.card:hover {
  box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
}

.container {
  padding: 2px 16px;
}

.container p {
  word-wrap: break-word;
}

.centered {
  text-align: center;
}

<body class="plum">
  <br>
  <div class="column">
    <div class=" grid">
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes again</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: this is a post</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: This is the first post from the website</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I have added this</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I'm joe</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: Okay</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I like memes too</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: Caps test</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: OKAYYYYYYYYYYYYYYYYYYYYYYYY</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: sssssssssssssssssss</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: SSSSSSSSSSSSSSSSSS</p>
        </div>
      </div>
    </div>
  </div>
  <p class="centered"><a href="submitform.php">Add new</a></p>

Answer 1

这是由 grid-gap 引起的。您正在使用 grid-gap: 2%;，它在列和行之间应用 % 间隙。正如我们所见，这对网格本身非常有效，并且网格在其总高度中包括行之间 2% 的间隙。

但是 using percentages for height is problematic 当容器没有定义的高度时。这里发生的事情是容器无法识别 % 间隙高度并且没有将它包括在它的总高度中。

您可以使用定义的高度值轻松修复它，例如

grid-column-gap: 2%;    // you can still use % for the column gap
grid-row-gap: 20px;     // fixed height for row gap

工作示例：

.column {
  margin-top: 3%;
  margin-left: 20%;
  margin-right: 20%;
  background-color: rgba(200, 0, 0, 0.1);
}

.grid {
  display: grid;
  grid-template-columns: repeat( auto-fit, minmax(300px, 1fr));
  grid-auto-rows: (0px, 1fr);
  grid-column-gap: 2%;
  grid-row-gap: 20px;
}

.plum {
  /* background-color: plum; */
}

.card {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  transition: 0.3s;
  border-radius: 10px;
  background-color: rgba(0, 0, 0, 0.1);
}

.card:hover {
  box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
}

.container {
  padding: 2px 16px;
}

.container p {
  word-wrap: break-word;
}

.centered {
  text-align: center;
}

<body class="plum">
  <br>
  <div class="column">
    <div class=" grid">
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes again</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: this is a post</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: This is the first post from the website</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I have added this</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I'm joe</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: Okay</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I like memes too</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: Caps test</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: OKAYYYYYYYYYYYYYYYYYYYYYYYY</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: sssssssssssssssssss</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: SSSSSSSSSSSSSSSSSS</p>
        </div>
      </div>
    </div>
  </div>
  <p class="centered"><a href="submitform.php">Add new</a></p>

宽度：

使用 % 作为列间隙有时也会导致问题，如果列是使用 % ad 定义的，则不会考虑间隙。

但是，您已正确设置列，所以这不是导致网格在此处的较小屏幕上延伸出容器的原因。这是由于在此处将最小网格设置为 450px 造成的：

grid-template-columns: repeat( auto-fit, minmax(450px, 1fr));

大约 300 像素的值可能更合适，因为它适合绝大多数移动屏幕（320px 通常被认为是可容纳的最小宽度，但不要忘记外边距元素也是）。

Answer 2

.column {
  margin-top: 3%;
  margin-left: 20%;
  
  background-color: rgba(200, 0, 0, 0.1);
}

.grid {
  display: grid;
  grid-template-columns: repeat( auto-fit, minmax(450px, 1fr));
  grid-auto-rows: (0px, 1fr);
  grid-gap: 2%;
}

.plum {
  /* background-color: plum; */
}

.card {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  transition: 0.3s;
  border-radius: 10px;
  background-color: rgba(0, 0, 0, 0.1);
}

.card:hover {
  box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
}

.container {
  padding: 2px 16px;
}

.container p {
  word-wrap: break-word;
}

.centered {
  text-align: center;
}

<body class="plum">
  <br>
  <div class="column">
    <div class=" grid">
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I like memes again</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: this is a post</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: This is the first post from the website</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: I have added this</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I'm joe</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: Okay</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: joe</p>
          <p>Text: I like memes too</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: Caps test</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: OKAYYYYYYYYYYYYYYYYYYYYYYYY</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: sssssssssssssssssss</p>
        </div>
      </div>
      <div class="card">
        <div class="container">
          <p>Poster: tester</p>
          <p>Text: SSSSSSSSSSSSSSSSSS</p>
        </div>
      </div>
    </div>
  </div>
  <p class="centered"><a href="submitform.php">Add new</a></p>

从（.列）class.

中删除 margin-right

CSS 网格的高度大于其容器 div

CSS Grid is larger than it's container div in height

html

css

grid