increasing the size of an element while keeping its overflow hidden

Is it possible to expand an element with "overflow: hidden" when clicked without affecting other elements?

I'm looking for a solution that allows the expanded element to overlap and hide the element below it, rather than pushing it down. I've tried using "position: absolute", but this causes the next element to collapse to the top.

Here is what I have so far: http://jsfiddle.net/up6bW/2/

Can this be achieved solely through CSS on the clicked element? If adjustments to other elements are necessary, can they be calculated automatically using JavaScript?

javascripthtmlcssoverflow

Answer №1

One potential solution involves enclosing the div in a container as shown below:

HTML:

<div class="container">
    <div class="a" onclick="z(this)">
        click here click here click here click here click here
    </div>
</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>

CSS:

body { margin: 10px; }

div { font-family: sans-serif; font-size: 16px; line-height: 20px; margin-bottom: 10px; width: 150px; word-break: break-all; }

div.a { color: tomato; cursor: pointer; height: 20px; overflow: hidden; }
.container { height: 20px; overflow: visible; }

JS:

function z (a) {
    a.style.cssText = a.style.border ? "" : "\
        background: #fff;\
        border: 1px solid #ccc;\
        height: auto;\
        margin-left: -5px;\
        margin-top: -5px;\
        padding: 4px;\
        position: absolute;\
        ";
};

Check out the demo here

While adding HTML elements for styling purposes is not ideal, it may be preferable to using JavaScript.

Tested and working in IE7+, Chrome, and Firefox

Answer №2

Check out this example for a solution: http://jsfiddle.net/up6bW/39/

To achieve the desired effect, I made the position:absolute on your dropdown Div and added some padding to the first of the other divs:

Firstly, modify the second div by adding a class:

<div class="a" onclick="z(this)">click here click here click here click here click here</div>
<div class="second">1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>

​ Next, update the CSS like this:

body {
    margin: 10px;
}

div {
    width: 150px;
    font-family: sans-serif;
    font-size: 16px;
    line-height: 20px;
    margin-bottom: 10px;
    word-break: break-all;
}

div.a {
    cursor: pointer;
    color: tomato;
    height: 20px;
    overflow: hidden;
    position:absolute;
}
.second{
    padding:25px 0px 0px 0px;       
}​

The div you want to expand will be positioned absolutely, while the second div will have sufficient padding to adjust for the first div's positioning.

Answer №3

Stacking elements on top of one another necessitates the use of absolute positioning. Adding some padding-top to the initial element can help adjust for the overlap in positioning.

Answer №4

This solution I'm using automatically includes padding to the next element.

http://jsfiddle.net/up6bW/47/

HTML

<div class="a" onclick="z(this)">click here click here click here</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div class="a" onclick="z(this)">click here click here click here</div>
<div>1234567890</div>
<div>1234567890</div>
<div>1234567890</div>
<div class="a" onclick="z(this)">click here click here click here</div>

CSS

div {
    font-family: sans-serif;
    font-size: 16px;
    line-height: 20px;
    width: 150px;
    word-break: break-all;
}

div.a {
    color: tomato;
    cursor: pointer;
    height: 20px;
    overflow: hidden;
}

JavaScript

function z (a) {

    // Equivalent to nextElementSibling
    var b = a.nextSibling;
    while (b && b.nodeType != 1)
        b = b.nextSibling;

    if (b)
        b.style.cssText = b.style.paddingTop ? "" : "padding-top: " + a.clientHeight + "px";

    a.style.cssText = a.style.border ? "" : "\
        background: #fff;\
        border: 1px solid #ccc;\
        height: auto;\
        margin-left: -5px;\
        margin-top: -5px;\
        padding: 4px;\
        position: absolute;\
        ";

};

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