overflow:滚动div与position:绝对元素inside

时间:2017-08-31 21:38:23

标签: css scroll css-position absolute

我在溢出中有一个表:滚动容器,表中有一些按钮,当有人点击它们时,它们会显示一个上下文/工具提示(位置:绝对层)文本。

当我向右滚动并单击按钮时,它向外移动到右边忽略滚动:

enter image description here

使容器位置相对解决位置问题,但它出现在容器内部而不显示菜单:

enter image description here

我需要帮助才能获得以下所需的行为:

enter image description here

这是片段:

.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>

3 个答案:

答案 0 :(得分:2)

对于有此问题但设置为鼠标位置无济于事的人

如果你和我有同样的问题,父容器设置为 overflow: scroll 并且父元素的子元素被截断,尽管 position: absolute - 执行以下操作

以用例为例,构建下拉菜单

  • 将元素设置为 position: fixed
  • 获取父元素的视口位置
  • 将位置 topleftbottomright 的值设置为视口值

您可以使用与@jfeferman 中的代码片段相同的代码

答案 1 :(得分:1)

将上下文div放在溢出的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>

答案 2 :(得分:-1)

您可以使用z-index: 2。这将仅在必要时显示滚动条。另外,您可以从.contextual删除filter.jq