javascript - 定高容器如何分成80%和20%

Question

我有一个固定位置容器，我想把它分成两半，i,e

80% 和 20% 底部

这样我应该看起来像这样:

注意:它应该在窗口调整大小时自行调整

here是代码笔:

这是我尝试过的:

#wrapper {
    padding-left: 0;
    transition: all 0.5s ease;
    height: 100%;
}
#sidebar-wrapper {
    z-index: 1000;
    position: fixed;
    left: 250px;
    width: 200px;
    height: 80%;
    margin-left: -250px;
    overflow-y: auto;
    background: rgba(0,0,0,0.9);
    transition: all 0.5s ease;
    border: 3px solid red;
    color:white;
}
.stories-preview-wrapper{
  height: 20%;
  border:3px solid green;
  width:210px;
}

    <div id="wrapper" class="toggled hidden-xs">
        <!-- Sidebar -->
        <div id="sidebar-wrapper">
                <ul class="sidebar-nav">
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                </ul>
        </div>
      <div class="stories-preview-wrapper">
             <ul class="sidebar-nav">
                  <li>hello world 2</li>
                  <li>hello world 2</li>
              </ul>
      </div>
 </div>

Answer 1

看看:

#wrapper {
    padding-left: 0;
    transition: all 0.5s ease;
    height: 100%;
}
#sidebar-wrapper {
    z-index: 1000;
    position: fixed;
    top: 0;
    left: 0;
    width: 210px;
    height: calc(80vh - 6px); /* As you give a border of 3px */
    overflow-y: auto;
    background: rgba(0,0,0,0.9);
    transition: all 0.5s ease;
    border: 3px solid red;
    color:white;
}
.stories-preview-wrapper{
  position: fixed;
  height: calc(20vh - 6px); /* As you give a border of 3px */
  bottom: 0;
  left: 0;
  border: 3px solid green;
  width: 210px;
}

<div id="wrapper" class="toggled hidden-xs">
        <!-- Sidebar -->
        <div id="sidebar-wrapper">
                <ul class="sidebar-nav">
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                  <li>hello world</li>
                </ul>
        </div>
      <div class="stories-preview-wrapper">
             <ul class="sidebar-nav">
                  <li>hello world 2</li>
                  <li>hello world 2</li>
              </ul>
      </div>
 </div>