Displaying an element outside overflow hidden container

Answer 1

This is a trick that works. but be sure to test on your own.

Chage Your Class From Position :relative To Position Fixed .

.pRelative {
    position: fixed;
}

Here Is The DEMO

Answer 2

try this ,


   <div class="main">
    <table>
        <tr>
            <td>row1 column1</td>
            <td>
                <div class="pRelative">
                    <div class="pAbsolute dropdown">
                        <div class="option">Zero</div>
                        <div class="option">One</div>
                        <div class="option">Two</div>
                        <div class="option">Three</div>
                        <div class="option">Four</div>
                        <div class="option">Five</div>
                        <div class="option">Six</div>
                    </div>
                </div>
            </td>
            <td>row1 column3</td>
        </tr>
        <tr>
            <td>row2 column1</td>
            <td>row2 column2</td>
            <td>row2 column3</td>
        </tr>
        <tr>
            <td>row3 column1</td>
            <td>row3 column2</td>
            <td>row3 column3</td>
        </tr>
        <tr>
            <td>row4 column1</td>
            <td>row4 column2</td>
            <td>row4 column3</td>
        </tr>
        <tr>
            <td>row5 column1</td>
            <td>row5 column2</td>
            <td>row5 column3</td>
        </tr>
        <tr>
            <td>row6 column1</td>
            <td>row6 column2</td>
            <td>row6 column3</td>
        </tr>
        <tr>
            <td>row7 column1</td>
            <td>row7 column2</td>
            <td>row7 column3</td>
        </tr>
        <tr>
            <td>row8 column1</td>
            <td>row8 column2</td>
            <td>row8 column3</td>
        </tr>
    </table>
</div>


**Css**


body{
  position:relative;
}
.main {
    height: 100px;
    overflow-y: scroll;
    overflow-x: hidden;
}

.pAbsolute {
    position: absolute;
}
.dropdown {
    width: 100px;
    background-color: cornflowerblue;
    z-index: 1000;
}
.option {
    border-top: 1px solid green;
    border-bottom: 1px solid green;
}

table td{
    border: 1px solid black;
    padding: 10px;
}

Answer 3

The problem here is that you want the drop-down to "escape" its parent, while staying relative to it's parent. This is AFAIK not possible.

If you position the drop-down absolutely, you "bind" it to the nearest element with position: relative in its direct parent chain, or if no such element to the html element. There is a "trick" where if you do not provide any top/bottom/left/right-values, the element will still position itself where it would have started if it was inline.

This is why when we remove the relatively positioned wrapper the absolutely positioned drop-down "escapes" the overflow-y: hidden; value on .main (because it attaches to the html-element instead). This also means that its position will not be affected as long as the html-element is not being scrolled.

When you have a relatively positioned wrapper inside the .main the drop-down gets cut off like anything else inside it.

Answer 4

As long as the drop down is a child of .main it isn't possible with CSS alone. That's because your .main has overflow-y: scroll; You can't have your cake and eat it too.

Answer 5

You can change positioning of the dropdown to fixed and handle the scroll using js, like the following.

var main = document.getElementsByClassName('main')[0];
var dd = document.getElementsByClassName('pAbsolute')[0];
var offset = dd.getBoundingClientRect().top;
main.onscroll = function() {
  var st = main.scrollTop;
  ddt = (offset - st);
  dd.style.top = ddt + 'px';
}

.main {
  height: 100px;
  overflow-y: scroll;
  overflow-x: hidden;
}
.pRelative {
  position: relative;
}
.pAbsolute {
  position: fixed;
}
.dropdown {
  width: 100px;
  background-color: cornflowerblue;
  z-index: 1000;
}
.option {
  border-top: 1px solid green;
  border-bottom: 1px solid green;
}
table td {
  border: 1px solid black;
  padding: 10px;
}

<div class="main">
  <table>
    <tr>
      <td>row1 column1</td>
      <td>
        <div class="pRelative">
          <div class="pAbsolute dropdown">
            <div class="option">Zero</div>
            <div class="option">One</div>
            <div class="option">Two</div>
            <div class="option">Three</div>
            <div class="option">Four</div>
            <div class="option">Five</div>
            <div class="option">Six</div>
          </div>
        </div>
      </td>
      <td>row1 column3</td>
    </tr>
    <tr>
      <td>row2 column1</td>
      <td>row2 column2</td>
      <td>row2 column3</td>
    </tr>
    <tr>
      <td>row3 column1</td>
      <td>row3 column2</td>
      <td>row3 column3</td>
    </tr>
    <tr>
      <td>row4 column1</td>
      <td>row4 column2</td>
      <td>row4 column3</td>
    </tr>
    <tr>
      <td>row5 column1</td>
      <td>row5 column2</td>
      <td>row5 column3</td>
    </tr>
    <tr>
      <td>row6 column1</td>
      <td>row6 column2</td>
      <td>row6 column3</td>
    </tr>
    <tr>
      <td>row7 column1</td>
      <td>row7 column2</td>
      <td>row7 column3</td>
    </tr>
    <tr>
      <td>row8 column1</td>
      <td>row8 column2</td>
      <td>row8 column3</td>
    </tr>
  </table>
</div>

Demo

Update

You can fix the margin-top issue by creating a new stacking context.

(tested only in safari 6.1 mac - unfortunately doesn't works in any latest browsers) Updated Demo or Another Demo

Update

The only possible cross browser workaround i could find for hiding the fixed elements overflow is to clip the container (this requires it to be a positioned element)

var main = document.getElementsByClassName('main')[0];
var dd = document.getElementsByClassName('pAbsolute')[0];
var offset = dd.getBoundingClientRect().top;
main.onscroll = function() {
  var st = main.scrollTop;
  ddt = (offset - st);
  dd.style.top = ddt + 'px';
}

.main {
  height: 100px;
  overflow-y: scroll;
  overflow-x: hidden;
  margin-top: 100px;
  position: absolute;
  clip: rect(auto, auto, 99999px, auto);
}
.pRelative {
  position: relative;
}
.pAbsolute {
  position: fixed;
}
.dropdown {
  width: 100px;
  background-color: cornflowerblue;
  z-index: 1000;
}
.option {
  border-top: 1px solid green;
  border-bottom: 1px solid green;
}
table td {
  border: 1px solid black;
  padding: 10px;
}

<div class="main">
  <table>
    <tr>
      <td>row1 column1</td>
      <td>
        <div class="pRelative">
          <div class="pAbsolute dropdown">
            <div class="option">Zero</div>
            <div class="option">One</div>
            <div class="option">Two</div>
            <div class="option">Three</div>
            <div class="option">Four</div>
            <div class="option">Five</div>
            <div class="option">Six</div>
          </div>
        </div>
      </td>
      <td>row1 column3</td>
    </tr>
    <tr>
      <td>row2 column1</td>
      <td>row2 column2</td>
      <td>row2 column3</td>
    </tr>
    <tr>
      <td>row3 column1</td>
      <td>row3 column2</td>
      <td>row3 column3</td>
    </tr>
    <tr>
      <td>row4 column1</td>
      <td>row4 column2</td>
      <td>row4 column3</td>
    </tr>
    <tr>
      <td>row5 column1</td>
      <td>row5 column2</td>
      <td>row5 column3</td>
    </tr>
    <tr>
      <td>row6 column1</td>
      <td>row6 column2</td>
      <td>row6 column3</td>
    </tr>
    <tr>
      <td>row7 column1</td>
      <td>row7 column2</td>
      <td>row7 column3</td>
    </tr>
    <tr>
      <td>row8 column1</td>
      <td>row8 column2</td>
      <td>row8 column3</td>
    </tr>
  </table>
</div>

Demo

Answer 6

You could get the desired functionality by using a good old fashioned <select> dropdown:

Working Example

<div class="main">
    <table>
        <tr>
            <td>row1 column1</td>
            <td>
                <select class="dropdown">
                    <option class="option">Zero</option>
                    <option class="option">One</option>
                    <option class="option">Two</option>
                    <option class="option">Three</option>
                    <option class="option">Four</option>
                    <option class="option">Five</option>
                    <option class="option">Six</option>
                </select>
            </td>
            <td>row1 column3</td>
        </tr>