html - 如何水平扩展 CSS 家谱？

Question

我使用 CSS 创建了一个家谱。

家谱可以正常工作，但问题是如果一行中的列表太多，它会在行的右端断开该行，并在新行上显示。

如何在不破坏子元素的情况下使这个家谱水平延伸？即使我在页面底部没有水平滚动条，我也只想按原样显示这棵树 - 无需将元素移动到新行中。

这是代码:

.tree ul {
  overflow-x: auto;
  padding-top: 20px; position: relative;
  
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}

.tree li {
  overflow-x: auto;
  float: left; text-align: center;
  list-style-type: none;
  position: relative;
  padding: 20px 5px 0 5px;
  
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}

/*We will use ::before and ::after to draw the connectors*/

.tree li::before, .tree li::after{
  content: '';
  position: absolute; top: 0; right: 50%;
  border-top: 1px solid #F39331;
  width: 50%; height: 20px;
}
.tree li::after{
  right: auto; left: 50%;
  border-left: 1px solid #F39331;
}

/*We need to remove left-right connectors from elements without 
any siblings*/
.tree li:only-child::after, .tree li:only-child::before {
  display: none;
}

/*Remove space from the top of single children*/
.tree li:only-child{ padding-top: 0;}

/*Remove left connector from first child and 
right connector from last child*/
.tree li:first-child::before, .tree li:last-child::after{
  border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
  border-right: 1px solid #F39331;
  border-radius: 0 5px 0 0;
  -webkit-border-radius: 0 5px 0 0;
  -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
  border-radius: 5px 0 0 0;
  -webkit-border-radius: 5px 0 0 0;
  -moz-border-radius: 5px 0 0 0;
}

/*Time to add downward connectors from parents*/
.tree ul ul::before{
  content: '';
  position: absolute; top: 0; left: 50%;
  border-left: 1px solid #F39331;
  width: 0; height: 20px;
}

.tree li a{
  border: 1px solid #0F60AF;
  background-color: #0F60AF;
  padding: 5px 10px;
  text-decoration: none;
  color: #fff;
  font-family: arial, verdana, tahoma;
  font-size: 11px;
  display: inline-block;
  
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}

bg_orange {
  border: 1px solid #F39331;
  background-color: #F39331;
}

/*Time for some hover effects*/
/*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
  background: #F39331; color: #fff; border: 1px solid #F39331;
}

<div class="tree">
  <ul>
    <li>
      <a href="#">Parent</a>
      <ul>
        <li>
          <a href="#">Child</a>
          <ul>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
              <ul>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
              </ul>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
          </ul>
        </li>
        <li>
          <a href="#">Child</a>
        </li>
        <li>
          <a href="#">Child</a>
        </li>
        <li>
          <a href="#">Child</a>
          <ul>
            <li>
              <a href="#">Grand Child</a>
            </li>
          </ul>
        </li>
        <li>
          <a href="#">Child</a>
          <ul>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
            <li>
              <a href="#">Grand Child</a>
              <ul>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
                <li>
                  <a href="#">Great Grand Child</a>
                </li>
              </ul>
            </li>
            <li>
              <a href="#">Grand Child</a>
            </li>
          </ul>
        </li>
      </ul>
    </li>
  </ul>
</div>

寻求有关如何水平扩展它的帮助？

谢谢。

阿俊

Answer 1

在这种情况下，您可以通过将 display:flex 添加到 .tree ul 来使用 css-flexbox，这应该可以工作

display: flex;
padding-top: 20px;
position: relative;
transition: all 0.5s;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;

你似乎也没有为父级 ul 定义一个 width，添加 width:100% 到 .tree ul .