调整窗口大小时，树视图将被包裹。
在Bootstrap中，表格在调整窗口大小时不会缩小，但是会出现一个水平滚动条，可用于滚动表格以查看表格。
如何使它像Bootstrap 4响应表一样？这样，在调整窗口大小时，树形视图不会缩小，并且可以看到水平滚动条以滚动和查看完整的树形视图。
/*Now the CSS*/
* {margin: 0; padding: 0;}
.tree ul {
padding-top: 20px; position: relative;
transition: all 0.5s;
-webkit-tranasition: all 0.5s;
-moz-transition: all 0.5s;
}
.tree li {
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 #ccc;
width: 50%; height: 20px;
}
.tree li::after{
right: auto; left: 50%;
border-left: 1px solid #ccc;
}
/*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 #ccc;
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 #ccc;
width: 0; height: 20px;
}
.tree li a{
border: 1px solid #ccc;
padding: 5px 10px;
text-decoration: none;
color: #666;
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;
}
/*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: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
border-color: #94a0b4;
}<div class="tree">
<ul>
<li>
<a href="#">1</a>
<ul>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li><li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3</a>
<ul>
<ul>
<li>
<a href="#">3.1</a>
<ul>
<li>
<a href="#">3.1.1</a>
</li>
<li>
<a href="#">3.1.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3.2</a>
</li>
</ul>
</ul>
</li>
</ul>
</li>
</ul>
</div>
答案 0 :(得分：1)
作为一个简单的示例，我在.tree元素周围添加了一个容器，并给了它一个width: 100%和overflow: scroll。然后，将.tree设置为静态宽度。似乎工作正常。
/*Now the CSS*/
* {margin: 0; padding: 0;}
.tree { width: 1000px; } /* ******* I added this ******* */
.tree ul {
padding-top: 20px; position: relative;
transition: all 0.5s;
-webkit-tranasition: all 0.5s;
-moz-transition: all 0.5s;
}
.tree li {
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 #ccc;
width: 50%; height: 20px;
}
.tree li::after{
right: auto; left: 50%;
border-left: 1px solid #ccc;
}
/*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 #ccc;
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 #ccc;
width: 0; height: 20px;
}
.tree li a{
border: 1px solid #ccc;
padding: 5px 10px;
text-decoration: none;
color: #666;
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;
}
/*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: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
border-color: #94a0b4;
}
.tree-cont { width: 100%; overflow: scroll; }<div class="tree-cont"> <!-- added this wrapper -->
<div class="tree">
<ul>
<li>
<a href="#">1</a>
<ul>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li><li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3</a>
<ul>
<ul>
<li>
<a href="#">3.1</a>
<ul>
<li>
<a href="#">3.1.1</a>
</li>
<li>
<a href="#">3.1.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3.2</a>
</li>
</ul>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
答案 1 :(得分：0)
请检查代码段。
/*Now the CSS*/
* {margin: 0; padding: 0;}
.tree{
width:100%;
overflow-x:scroll;
}
.scrollwidth{width:900px;}
.tree ul {
padding-top: 20px; position: relative;
transition: all 0.5s;
-webkit-tranasition: all 0.5s;
-moz-transition: all 0.5s;
}
.tree li {
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 #ccc;
width: 50%; height: 20px;
}
.tree li::after{
right: auto; left: 50%;
border-left: 1px solid #ccc;
}
/*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 #ccc;
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 #ccc;
width: 0; height: 20px;
}
.tree li a{
border: 1px solid #ccc;
padding: 5px 10px;
text-decoration: none;
color: #666;
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;
}
/*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: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
border-color: #94a0b4;
}<div class="tree">
<ul class="scrollwidth">
<li>
<a href="#">1</a>
<ul>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li><li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3</a>
<ul>
<ul>
<li>
<a href="#">3.1</a>
<ul>
<li>
<a href="#">3.1.1</a>
</li>
<li>
<a href="#">3.1.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3.2</a>
</li>
</ul>
</ul>
</li>
</ul>
</li>
</ul>
</div>
答案 2 :(得分：0)
请检查代码段。
/*Now the CSS*/
* {margin: 0; padding: 0;}
.tree{width:100%;overflow-x:scroll;}
.scrollwidth{width:900px;}
.tree ul {
padding-top: 20px; position: relative;
transition: all 0.5s;
-webkit-tranasition: all 0.5s;
-moz-transition: all 0.5s;
}
.tree li {
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 #ccc;
width: 50%; height: 20px;
}
.tree li::after{
right: auto; left: 50%;
border-left: 1px solid #ccc;
}
/*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 #ccc;
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 #ccc;
width: 0; height: 20px;
}
.tree li a{
border: 1px solid #ccc;
padding: 5px 10px;
text-decoration: none;
color: #666;
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;
}
/*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: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
border-color: #94a0b4;
}<div class="tree">
<ul class="scrollwidth">
<li>
<a href="#">1</a>
<ul>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li><li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">2</a>
<ul>
<li>
<a href="#">2.1</a>
</li>
<li>
<a href="#">2.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3</a>
<ul>
<ul>
<li>
<a href="#">3.1</a>
<ul>
<li>
<a href="#">3.1.1</a>
</li>
<li>
<a href="#">3.1.2</a>
</li>
</ul>
</li>
<li>
<a href="#">3.2</a>
</li>
</ul>
</ul>
</li>
</ul>
</li>
</ul>
</div>