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如何消除子元素浮动造成父元素高度折叠的影响

实例

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="css1.css">
    <title>Document</title>
</head>

<body>
    <div class="box1">
        <div class="box2">子区块1</div>
        <div class="box3">子区块2</div>
    </div>
    <!-- 浮动定位实现 -->
    <div class="box5">
        <div class="box6"></div>
        <div class="box7"></div>
        <div class="box8"></div>
    </div>
    <!-- 绝对定位实现 -->
    <div class="box11">
        <div class="box12">子区块1</div>
        <div class="box13">子区块2</div>
        <div class="box14">子区块3</div>
    </div>
</body>

</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

实例

.box1 {
    width: 500px;
    border: 3px #f00 dashed;
    overflow: hidden;
}

.box2 {
    width: 200px;
    height: 300px;
    float: left;
    background-color: lightcoral
}

.box3 {
    width: 200px;
    height: 300px;
    float: left;
    background-color: lightgreen;
}


/* 浮动定位实现 */

.box5 {
    margin: 50px auto;
    width: 500px;
    border: 2px #f00 dashed;
    background-color: lawngreen;
    overflow: hidden;
}

.box6 {
    float: left;
    width: 100px;
    height: 400px;
    background-color: lightsalmon
}

.box7 {
    float: left;
    width: 300px;
    height: 400px;
    background-color: lemonchiffon;
}

.box8 {
    float: right;
    width: 100px;
    height: 400px;
    background-color: lightskyblue;
}


/* 绝对定位实现  */

.box11 {
    margin: 50px auto;
    width: 500px;
    border: 2px #f00 dashed;
    background-color: lightgray;
    position: relative;
    height: 500px;
}

.box12 {
    width: 100px;
    height: 400px;
    background-color: lightpink;
    position: absolute;
    top: 0;
    left: 0;
}

.box13 {
    width: 300px;
    height: 400px;
    background-color: lightslategrey;
    position: absolute;
    top: 0;
    left: 100px;
}

.box14 {
    width: 100px;
    height: 400px;
    background-color: lightgreen;
    position: absolute;
    top: 0;
    left: 400px;
}

运行实例 »

点击 "运行实例" 按钮查看在线实例

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如何消除子元素浮动造成父元素高度折叠的影响

实例

实例