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Asked: 2026-05-26T09:25:42+00:00

After playing with CSS 3, I had the crazy idea to make an OS

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After playing with CSS 3, I had the crazy idea to make an OS X-style dock with it (a DIV container with elements inside it, which, using the CSS :hover subclass, increase in size upon mouseover). However, I’m running into some strange effects when implementing it. So far, this is what I’ve tried:

Code

<html>
<head>
<style>
body{
    margin:0;
}
.dockHolder{
    width:100%;
    position:absolute;
    text-align:center;
    display:block;
    bottom:0;
}
.dock{
    margin-left:auto;
    margin-right:auto;
    bottom:0;
    text-align:center;
}
.dockItem{
    height:50%;
    display:inline-block;
    position:relative;
    bottom:0;
    vertical-align:bottom;
    text-align:center;

    transition-property:width, height;
    -o-transition-property:width, height;
    -moz-transition-property:width, height;
    -webkit-transition-property:width, height;
    transition-duration:.25s;
    -o-transition-duration:.25s;
    -moz-transition-duration:.25s;
    -webkit-transition-duration:.25s;
    transition-timing-function:linear;
    -o-transition-timing-function:linear;
    -moz-transition-timing-function:linear;
    -webkit-transition-timing-function:linear;
}
.dockItem:hover{
    height:100%;
    width:auto;
}
</style>
</head>
<body>
<div class="dockHolder" style="height:64px;max-height:64px;border:1px solid black;">
    <div class="dock" style="background-color:lightgray;">
        <center>
            <div class="dockItem" style="background-color:magenta;"><img height="100%" src="pony.png" /></div>
            <div class="dockItem" style="background-color:magenta;"><img height="100%" src="bhs256.png" /></div>
        </center>
    </div>
</div>
</body>
</html>

My test page is at http://s.supuhstar.operaunite.com/s/content/testAnims.htm(died with Opera Unite) if you wanna see what I have so far.

Missing functionality

Unexpected effects include:

  • Inability to place the dock element at the bottom of the dockHolder element
  • dockItem element not expanding width-wise along with its child image
  • dockItem and dock elements will not center inside the dockHolder container with CSS (tried margin:auto;, box-pack:center;, box-align:center;, etc.); only the <center> HTML tag works
  • In Opera and Firefox (I’ve given up on IE), dockItems are extremely wide

Intended effects that are not present include:

  • dockItems stay within the dock element until resizing, at which time they increase proportionally to the size of the dockHolder element, but the dock element stays the same size
  • The dock element is constantly only wide enough to contain all the dockItems within it, and never wider not shorter than the combined widths of all dockItems and their margins.

Question

Does anyone have a solution that will fix the unexpected effects andor implement the absent intended effects?

Final implementation

Below is the code of my final solution:

<!DOCTYPE html><html>
<head>
<style type='text/css'>
body{
    margin:0;
}
.dockHolder {
    position: fixed;
    text-align: center;
    bottom: 0; 
    left: 0;
    right: 0;
    height: 128px;
    line-height: 128px;
}

.dock {
    background:#CCCCCC;
    background:
        -o-linear-gradient(top, #AAA 0, #CCC 49%, #AAA 51%, #808080 100%);
    background:
        -moz-linear-gradient(top, #AAA 0, #CCC 49%, #AAA 51%, #808080 100%);
    background:
        -webkit-linear-gradient(top, #AAA 0, #CCC 49%, #AAA 51%, #808080 100%);
    border: 1px solid gray;
    max-width:100%;
    vertical-align: bottom;
    line-height: 1em;
    padding: 0 8px;
    border-radius: 100%;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.dockItem {
    display: inline;
    height: 50%;
    vertical-align: bottom;

    transition-property:width, height;
    -o-transition-property:width, height;
    -ms-transition-property:width, height;
    -moz-transition-property:width, height;
    -webkit-transition-property:width, height;
    transition-duration:.25s;
    -o-transition-duration:.25s;
    -ms-transition-duration:.25s;
    -moz-transition-duration:.25s;
    -webkit-transition-duration:.25s;
    transition-timing-function:ease-in-out;
    -o-transition-timing-function:ease-in-out;
    -ms-transition-timing-function:ease-in-out;
    -moz-transition-timing-function:ease-in-out;
    -webkit-transition-timing-function:ease-in-out;
}
.dockItem:hover {
    height: 100%;
}
.dockItem:active {
    vertical-align:top;
    height:95%
}
</style>
</head>
<body>
    <div class="dockHolder" style="height:128px;line-height:128px;">
        <span class="dock">
            <img class="dockItem" src="pony.png"/>
            <img class="dockItem" src="bhs256.png"/>
            <img class="dockItem" src="mcgrass.png"/>
        </span>
    </div>

</body>
</html>

Working example (might go out of date): http://admin.s.supuhstar.operaunite.com/s/content/testDock.html (died with Opera Unite)

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1 Answer

  1. Editorial Team

    How’s this?

    HTML:

    <div class="dockbg"></div>
<div class="dock">
    <img src="foo.png">
    <img src="bar.png">
</div>

    CSS:

    .dockbg {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 35px;
    background: #bbb;
}

.dock {
    position: fixed;
    text-align: center;
    bottom: 5px;
    left: 0;
    right: 0;
    height: 100px;
    line-height: 100px;
}

.dock img {
    display: inline-block;
    vertical-align: bottom;
    height: 50%;
    padding: 0 5px;
    /* + your animation properties */
}


.dock img:hover {
    height: 100%;
}

    Live demo: http://jsfiddle.net/simevidas/QM7M7/3/show/

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