The z-index property controls how elements are layered along an invisible z-axis. : z index « CSS « HTML / CSS






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  2. CSS
  3. z index

The z-index property controls how elements are layered along an invisible z-axis.

   
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
                      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'>
    <head>
        <title>The z-index</title>
<style type='text/css'>
body {
    font: 12px sans-serif;
    background: lightyellow;
}
div.container {
    height: 132px;
    position: relative;
}
div.zauto {
    position: absolute;
    border: 1px solid black;
    width: 100px;
    height: 100px;
}
div.zone {
    background: purple;
    top: 0;
    left: 0;
}
div.ztwo {
    background: orange;
    top: 10px;
    left: 10px;
}
div.zthree {
    background: magenta;
    top: 20px;
    left: 20px;
}
div.zfour {
    background: yellow;
    top: 30px;
    left: 30px;
}
div.slide {
    float: left;
    padding: 5px;
    width: 200px;
    border: 1px solid rgb(200, 200, 200);
    background: white;
    margin: 5px;
    height: 400px;
}
</style>


    </head>
    <body>
        <div class='slide'>

            <div class='container'>
                <div class='zauto zone'></div>
                <div class='zauto ztwo'></div>
                <div class='zauto zthree'></div>
                <div class='zauto zfour'></div>
            </div>
        </div>

    </body>
</html>








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1.'z-index' Example
2.z-index number
3.z-index settings
4.z-index: auto
5.z-index: child index
6.Z-index Positioning
7.You can control the z-index explicitly, however, by providing an integer value to the z-index property.
8.Nested elements handle the z-index property differently. Descendant elements must always have a z-index higher than that of their parent.
9.opacity and z-index
10.z-index among li items
11.Inline style for z-index
12.z-index controls the stacking order of positioned elements.
13.A negative value places element below the normal flow, and a positive value places them above the flow.
14.Use z-index to change the overlap index
15.Set z-index to 100
16.The default value for z-index is auto.
17.z index, child index
18.Larger values move them closer to the user in the stacking order.
19.Stacking with z-index
20.z-index value
21.three layers of div tags
22.z-index and sibling selector
23.z-index and child selector