我在overflow:scroll容器中有一个表,表中有一些按钮,当有人单击它们时,它们会显示上下文/工具提示(位置:绝对层)文本。
当我向右滚动并单击按钮时,它会向右移动到外部而忽略滚动:
使容器位置相对可以解决位置问题,但是它出现在容器内部而不显示菜单:
我需要帮助来获得以下期望的行为:
这是代码段:
.container{
width:200px;
height:100px;
overflow:scroll;
position:relative; /* removing this solves the problem, but .contextual moves to the original position */
}
.board{
width:400px;
}
.contextual{
display:none;
position:absolute;
width:100px;
height:100px;
margin: 20px;
z-index: 2;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class=container>
<table class=board>
<tr><td colspan=2>This board size (200) is bigger than its container size (100).</td></tr>
<tr>
<td>this is a button with a contextual element</td>
<td>
<input type=button value="click me" onclick="$('.contextual').show();" />
<div class=contextual>This is a contextual help text.</div>
</td>
</tr>
</table>
</div>
最佳答案
将上下文div置于溢出的div之外,并根据鼠标位置进行定位。
showContext = function() {
var e = window.event;
var posX = e.clientX;
var posY = e.clientY;
var context = document.getElementById("contextual")
context.style.top = posY + "px";
context.style.left = posX + "px";
context.style.display = "block";
}
.container{
width:200px;
height:100px;
overflow:scroll;
position:relative; /* removing this solves the problem, but .contextual moves to the original position */
z-index:1;
}
.board{
width:400px;
}
#contextual{
display:none;
position:absolute;
width:100px;
height:100px;
background-color:grey;
z-index: 2;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<table class="board">
<tr><td colspan=2>This board size (200) is bigger than its container size (100).</td></tr>
<tr>
<td>this is a button with a contextual element</td>
<td>
<input type="button" value="click me" onclick="javascript:showContext();" />
</td>
</tr>
</table>
</div>
<div id="contextual">This is a contextual help text.</div>