Question

我正在开发一个Web应用程序，我需要有关CSS的帮助。我是CSS的初学者，所以请多包涵。

我正在尝试为应用固定样式的侧边栏。侧栏占据了浏览器窗口的整个高度。整个侧栏是一个弹性框，而弹性子级也是嵌套的弹性框。

当前，flex子级与浏览器窗口一起移动，同时减小了视口高度，因此菜单链接被上推了（但是头像和用户名元素保持固定？！）。

我不希望这种情况发生。父容器内的菜单项应被剪切（而不是随浏览器窗口一起移动），并且用户可以向下滚动以查看其余菜单项（例如youtube网站上的侧栏）。

为便于参考，以下是当前结果和我实际想要的imgur链接：https://imgur.com/a/VShsF6o

此外，滚动条出现时似乎占用了额外的宽度。有什么办法可以阻止这种行为？

html {
  background-color: #141E30;
  margin: 0;
  padding: 0;
}

.sidebar {
  display: flex;
  flex-direction: column;
  width: 300px;
  top: 0;
  bottom: 0;
  position: fixed;
  overflow: auto;
  background: #0a0c0f;
  color: #EAE9E9;
}

.sidebar__profile {
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sidebar__menuitem {
  padding-bottom: 10px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  height: 30px;
}

.count {
  margin-left: auto;
  margin-right: 20px;
  border-radius: 6px;
  padding: 2px 5px;
  background-color: #EAE9E9;
  color: #0a0c0f;
}

<div class="sidebar">
  <div class="sidebar__profile">
    <img src="http://chittagongit.com//images/avatar-icon/avatar-icon-4.jpg" height=50px alt="image" class="sidebar__profile__avatar" />
    <div class="sidebar__profile__name">User Name</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 1</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 2</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 3</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 4</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 5</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 6</div>
    <div class="count">2</div>
  </div>
  <div class="sidebar__menuitem">
    <div>Menu Item 7</div>
    <div class="count">2</div>
  </div>
</div>

Answer 1

尝试将菜单项包装在其自己的容器中，为该容器提供滚动功能，并禁用配置文件上的缩小。

将此添加到您的代码中：

nav {
  overflow: auto;
}
.sidebar__profile {
  align-self: center;
  flex-shrink: 0;
}

revised jsfiddle demo

Answer 2

只需将.sidebar__profile包裹在另一个div中，这样它就可以充当块元素而不是收缩的flex元素...

html {
  background-color: #141E30;
  margin: 0;
  padding: 0;
}

.sidebar {
  display: flex;
  flex-direction: column;
  width: 300px;
  top: 0;
  bottom: 0;
  position: fixed;
  overflow: auto;
  background: #0a0c0f;
  color: #EAE9E9;
}

.sidebar__profile {
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sidebar__menuitem {
  padding-bottom: 10px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  height: 30px;
}

.count {
  margin-left: auto;
  margin-right: 20px;
  border-radius: 6px;
  padding: 2px 5px;
  background-color: #EAE9E9;
  color: #0a0c0f;
}

<!DOCTYPE html>
<html>

  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>title</title>
  </head>

  <body>
    <div class="sidebar">
      <div>
        <div class="sidebar__profile">
          <img src="http://chittagongit.com//images/avatar-icon/avatar-icon-4.jpg" height=50px alt="image" class="sidebar__profile__avatar" />
          <div class="sidebar__profile__name">User Name</div>
        </div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 1</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 2</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 3</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 4</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 5</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 6</div>
        <div class="count">2</div>
      </div>
      <div class="sidebar__menuitem">
        <div>Menu Item 7</div>
        <div class="count">2</div>
      </div>
    </div>
  </body>

</html>

调整窗口大小时保持弹性项目固定

2 个答案: