html标签+css选择器的使用--2018年8月19日10时14分作业 - html5和css3

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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>元素对齐方式</title>
</head>
<body>

<!-- 案例1 -->


<!-- <style>
    .box1 {
       width: 200px;
       height: 200px;
       background-color: #ffff0a;
      text-align: center;
    }
 .box1 a {
        line-height: 200px;
  }
</style>
<div class="box1">
    <a href="">php中文网</a>
</div>
<hr> -->




<!-- 案例2 -->
<!-- <style type="text/css" media="screen">

.box1{
    width:300px;
    height:300px;
    background:#ffff0a;
    text-align:center;
    display:table-cell;  /* 转化成单元格 */
    vertical-align:middle;  水平居中
}

</style>
<div class="box1">
    <<a href="">php中文网</a>
    <a href="">www.php.cn</a>
</div> -->


<!-- 案例3 -->
<!-- <style type="text/css" media="screen">

.box3{
    width:400px;
    height:400px;
    background:#f30;
    display:table-cell;
    vertical-align:middle;
}
.sun{
    width:100px;
    height:100px;
    background:blue;
    margin:0 auto;


</style>


<div class="box3">
    <div class="sun"></div>
</div> -->


<!-- 案例4 -->
<style type="text/css" media="screen">
.box4{
    width:200px;
    height:200px;
    background:#f30;
    display:table-cell;
    vertical-align:bottom;    /* top/middle/bottom */
    text-align:center;
}
.box4 ul{

}
.box4 li{
display:inline;
}

ul,li{
list-style:none;
padding:0;
margin:0;

}



</style>



<div class="box4">
    <ul>
        <li><a href="">1</a></li>
        <li><a href="">2</a></li>
        <li><a href="">3</a></li>
        <li><a href="">4</a></li>
        <li><a href="">5</a></li>
    </ul>
</div>
</body>
</html>

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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>绝对定位</title>
    <style>
        body {

        }
        .box {
            width: 600px;
            height: 600px;
            position: relative;
        }
        .box1 {
            width: 200px;
            height: 200px;
            background-color: #f30;
            position: absolute;
            top:0;
            left: 200px;

        }
        .box2 {
            width: 200px;
            height: 200px;
            background-color:blue;
            position: absolute;
            top:200px;
            left:0;
        }
        .box3 {
            width: 200px;
            height: 200px;
            background-color:#666;
            position: absolute;
            top: 200px;
            left: 400px;
        }
        .box4 {
            width: 200px;
            height: 200px;
            background-color: lightgrey;
            position: absolute;
            top: 400px;
            left: 200px;

        }

    </style>
</head>
<body>
<div class="box">
    <div class="box1"></div>
    <div class="box2"></div>
    <div class="box3"></div>
    <div class="box4"></div>
</div>

</body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

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