html - 显示隐藏文本时如何防止表格行重新调整大小？

Question

当您将鼠标悬停在父元素上时，我将此框显示为提示框。在表格单元格外实现相同的代码没有问题，但在表格单元格中，整行会在悬停文本时重新调整大小，因为新文本已添加到行中。

我怎样才能避免这种情况？

HTML:

<table border="1" cellspacing="0px" class="dtable">
<tr id="th">
<td>Name</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr>
<td class="hoverbox">Some text<span>Hidden text</span></td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
</table>

CSS:

# CSS for the table
.dtable {
     margin: 0px auto;
     border:1px solid #ccc;
     border-collapse: collapse;
     text-align: center;
     border-color: black;
     font-weight: bold;
     width: 100%;
}

.dtable tr:nth-child(odd){background-color:#303030}
.dtable tr:nth-child(even){background-color:#333333}

.dtable #th {
     background-color: #000;
     font-family: eurostile;
}

.dtable td {
     padding: 15px 0px;
     font-family: eurostile;
}

# CSS for the hidden text
.hoverbox span {
    background:#F8F8F8;
    border: 5px solid #DFDFDF;
    color: #717171;
    font-size: 13px;
    height: 30px;
    letter-spacing: 1px;
    line-height: 30px;
    position: relative;
    text-align: center;
    text-transform: uppercase;
    top: -80px;
    left:-30px;
    display: none;
    #padding:0 20px;
}

.hoverbox span:after {
    content:'';
    position:absolute;
    bottom:-10px; 
    width:10px;
    height:10px;
    border-bottom:5px solid #dfdfdf;
    border-right:5px solid #dfdfdf;
    background:#f8f8f8;
    left:50%;
    margin-left:-10px;
    -moz-transform:rotate(45deg);
    -webkit-transform:rotate(45deg);
    transform:rotate(45deg);
}

.hoverbox:hover span {
    display:block;
}

这是一个fiddle

提前致谢。

Answer 1

试试这个片段

.dtable {
	 margin: 0px auto;
     border:1px solid #ccc;
	 border-collapse: collapse;
	 text-align: center;
	 border-color: black;
	 font-weight: bold;
	 width: 100%;
}

.dtable tr:nth-child(odd){background-color:#303030}
.dtable tr:nth-child(even){background-color:#333333}

.dtable #th {
     background-color: #000;
	 font-family: eurostile;
}

.dtable td {
     padding: 15px 0px;
	 font-family: eurostile;
}

.hoverbox span {
    background:#F8F8F8;
    border: 5px solid #DFDFDF;
    color: #717171;
    font-size: 13px;
    height: 30px;
    letter-spacing: 1px;
    line-height: 30px;
    position: relative;
    text-align: center;
    text-transform: uppercase;
    top: -80px;
    left:-30px;
    display: none;
    #padding:0 20px;
}

.hoverbox span:after {
    content:'';
    position:absolute;
    bottom:-10px; 
    width:10px;
    height:10px;
    border-bottom:5px solid #dfdfdf;
    border-right:5px solid #dfdfdf;
    background:#f8f8f8;
    left:50%;
    margin-left:-10px;
    -moz-transform:rotate(45deg);
    -webkit-transform:rotate(45deg);
    transform:rotate(45deg);
}

.hoverbox:hover span {
    display:block;
     position:absolute;
     z-index: 9;
     top: 0;
     left: 50%;
}

<table border="1" cellspacing="0px" class="dtable">
  <tr id="th">
  <td>Name</td>
  <td>-</td>
  <td>-</td>
  <td>-</td>
  </tr>
  <tr>
  <td class="hoverbox">Some text<span>Hidden text</span></td>
  <td>-</td>
  <td>-</td>
  <td>-</td>
  </tr>
</table>

您必须将绝对位置添加到 span 本身，而不是添加到 .hoverbox span:after，如下所示:

.hoverbox:hover span {
    display:block;
     position:absolute;
     top: 0;
     left: 50%;
}