36、z-index叠放层次

2024-09-30 / 0 评论 / 9 阅读 / 正在检测是否收录...

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>z-index叠放层次</title>
    <style>
        /*
            一、z-index属性用于设置元素的叠放层次，属性值可以为一个整数，整数值越大越优先显示

                注意：z-index 只对开启了定位的元素有效
        */
        div{
            width: 200px;
            height: 200px;

        }
        .box1{
            background-color: #c7edcc;

            position: relative;
            left: 50px;
            top: 100px;

            z-index: -2;
        }
        .box2{
            background-color: #fed6e0;
            position: absolute;
            left: 150px;
            top: 150px;

            z-index: -1;
        }
        .box3{
            background-color: #dce2f1;
            float: left;

        }
    </style>
</head>
<body>
    <div class="box1">相对定位</div>
    <div class="box2">绝对定位</div>
    <div class="box3">浮动盒子</div>
</body>
</html>

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