如何解决溢出问题：滚动无法正常工作

Question

我试图让.menu-scroll类的<ul>列表的div中的项目在超过高度限制时显示滚动条，在我的情况下，它只会不断推动降到.menu-footer div并在页面中造成很大的问题。

body {
  margin: 0;
  padding: 0;
}

.grid {
  display: grid;
  grid-template-columns: 300px 100px auto 100px;
  grid-template-rows: 50% 50%;
  background-color: gray;
  height: 100vh;
}

.grid>#menu {
  display: grid;
  background-color: blueviolet;
  text-align: center;
  font-size: 30px;
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 1;
  grid-row-end: 2 end;
  grid-template-rows: auto 75px;
}

.grid>#posts-wrapper {
  display: grid;
  background-color: gray;
  text-align: center;
  font-size: 30px;
  grid-column-start: 3;
  grid-column-end: 4;
  grid-template-rows: 50px auto;
  grid-template-columns: auto;
}

#posts {
  background-color: white;
  grid-row-start: 2;
  grid-row-end: 3;
}

.menu-footer {
  background-color: green;
}

.menu-scroll {
  display: grid;
  grid-template-rows: 100px auto;
}

.menu-scroll>.cover {
  background-color: yellow;
}

.menu-scroll>.menu-list {
  position: sticky;
  overflow: scroll;
}

.list-item {
  background-color: tomato;
  padding: 10px 0px;
  margin-top: 5px;
}

<div class="grid" id="container">
  <div class="grid-item" id="menu">
    <div class="menu-scroll">
      <div class="cover">cover</div>
      <div class="menu-list">
        <ul style="list-style: none;">
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
        </ul>
      </div>
    </div>

    <div class="menu-footer">sticky footer</div>

  </div>

  <div class="grid" id="posts-wrapper">
    <div id="posts">
      posts
    </div>
  </div>
</div>

Answer 1

之所以这样，是因为在您的：

.menu-scroll {
  display: grid;
  grid-template-rows: 100px auto;
}

您设置了auto大小调整网格行中除第一个元素以外的所有元素。因此，无论您添加到第二个元素ul中的<div class="menu-list">中有多少项，它都会一直增长。

您需要将其设置为在第二个元素上具有明确的高度。

赞：

.menu-scroll {
      display: grid;
      grid-template-rows: 100px 300px auto;
    }

body {
  margin: 0;
  padding: 0;
}

.grid {
  display: grid;
  grid-template-columns: 300px 100px auto 100px;
  grid-template-rows: 50% 50%;
  background-color: gray;
  height: 100vh;
}

.grid>#menu {
  display: grid;
  background-color: blueviolet;
  text-align: center;
  font-size: 30px;
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 1;
  grid-row-end: 2 end;
  grid-template-rows: auto 75px;
}

.grid>#posts-wrapper {
  display: grid;
  background-color: gray;
  text-align: center;
  font-size: 30px;
  grid-column-start: 3;
  grid-column-end: 4;
  grid-template-rows: 50px auto;
  grid-template-columns: auto;
}

#posts {
  background-color: white;
  grid-row-start: 2;
  grid-row-end: 3;
}

.menu-footer {
  background-color: green;
}

.menu-scroll {
  display: grid;
  grid-template-rows: 100px 300px auto;
}

.menu-scroll>.cover {
  background-color: yellow;
}

.menu-scroll>.menu-list {
  position: sticky;
  overflow: scroll;
}

.list-item {
  background-color: tomato;
  padding: 10px 0px;
  margin-top: 5px;
}

<div class="grid" id="container">
  <div class="grid-item" id="menu">
    <div class="menu-scroll">
      <div class="cover">cover</div>
      <div class="menu-list">
        <ul style="list-style: none;">
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
          <li class="list-item">menu item</li>
        </ul>
      </div>
    </div>

    <div class="menu-footer">sticky footer</div>

  </div>

  <div class="grid" id="posts-wrapper">
    <div id="posts">
      posts
    </div>
  </div>
</div>