实例
下代码为外边距的三个特征: 同级塌陷,嵌套传递,自动挤压 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="static/css/qsb.css"> <title>外边距的三个特征</title> </head> <body> <h3>同级塌陷</h3> <div class="box1"></div> <div class="box2"></div> <h3>嵌套传递</h3> <div class="box3"> <div class="box4"></div> </div> <h3>自动挤压</h3> <div class="box5"></div> <div class="box6"></div> </body> </html>
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实例
.box1 {
width: 300px;
height: 150px;
background-color: yellow;
}
.box2 {
width:200px;
height:200px;
background-color: red;
}
.box1 {
margin-bottom: 30px;
}
.box2 {
margin-top: 50px;
}
.box3 {
width: 200px;
height: 200px;
background-color:greenyellow;
}
.box4 {
width:100px;
height:100px;
background-color: red;
}
.box4 {
margin-top: 0;
}
.box3 {
padding-top: 50px;
height: 150px;
}
.box5 {
width: 200px;
height: 200px;
background-color: blue;
}
.box {
margin: auto;
}
.box6 {
width:200px;
height:200px;
background-color: red;
}
.box5 {
margin: auto;
}
.box6 {
margin: 50px auto;
}
}运行实例 »
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以下为清除浮动代码
实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="static/css/bcs.css"> <title>浮动float</title> </head> <body> <div class="box1"></div> <div class="box2"></div> <div class="box3"></div> <div class="box4"></div> </body>
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实例
.box1 {
width: 150px;
height: 150px;
background-color: red;
}
.box2 {
width: 200px;
height: 200px;
background-color: blue;
}
.box1 {
float: left;
}
.box2 {
float: left;
}
.box3 {
width: 300px;
height: 300px;
background-color: green;
}
.box3 {
float: right;
}
.box4 {
width: 100%;
height: 300px;
background-color: black;
}
.box4 {
clear: left;
clear: right;
}运行实例 »
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以下为想对定位代码
实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>相对定位</title> <link rel="stylesheet" href="static/css/style5.css"> </head> <body> <h3>相对定位</h3> <div class="box1">1</div> <div class="box2">2</div> <div class="box3">3</div> <div class="box4">4</div> <div class="box5">5</div> <h3>绝对定位</h3> <div class="parent"> <div class="box6">1</div> <div class="box7">2</div> <div class="box8">3</div> <div class="box9">4</div> <div class="box10">5</div> </div> </body> </html>
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实例
.box1 {
width: 100px;
height: 100px;
background-color: green;
}
.box1 {
position: relative;
left: 100px;
}
.box2 {
width: 100px;
height: 100px;
background-color: blue;
}
.box3 {
width: 100px;
height: 100px;
background-color: red;
}
.box3 {
position: relative;
left: 100px;
top: -100px;
}
.box4 {
width: 100px;
height: 100px;
background-color: yellow;
}
.box4 {
position: relative;
left: 100px;
top: -100px;
}
.box5 {
width: 100px;
height: 100px;
background-color: darkorange;
}
.box5 {
position: relative;
left: 100px;
top: -100px;
}
.box6 {
width: 100px;
height: 100px;
background-color: green;
}
.box7 {
width: 100px;
height: 100px;
background-color: blue;
}
.box8 {
width: 100px;
height: 100px;
background-color: red;
}
.box9 {
width: 100px;
height: 100px;
background-color: yellow;
}
.box10 {
width: 100px;
height: 100px;
background-color: darkorange;
}
.parent {
border: 1px dotted black;
width: 400px;
height: 400px;
position: relative;
}
.box6 {
position: absolute;
left: 100px;
}
.box7 {
position: absolute;
top: 100px;
}
.box8 {
position: absolute;
top: 100px;
left: 100px;
}
.box9 {
position: absolute;
top: 100px;
left: 200px;
}
.box10 {
position: absolute;
top: 200px;
left: 100px;
}
以上代码执行结果截图运行实例 »
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模仿完成课堂上的二个定位案例:模拟php中文网登陆(遮罩+绝对定位)和固定定位广告的展示方式
实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="static/css/style5.css"> <title>模拟登陆页面</title> </head> <body> <div class="mask"></div> <div class="login"> <img src="static/images/login.png" alt="login"> </div> <div class="adv"> <button>X</button> <h3>招生小广告</h3> </div> </body> </html>
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实例
body{
margin: 0;
height: 2000px;
background-image: url("../images/phpweb.png");
background-size: cover;
background-repeat: no-repeat;
}
.mask{
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
background-color: black;
opacity: 0.7;
}
.login img {
width: 350px;
height: 480px;
position: absolute;
left:50%;
top:50%;
margin-left: -175px;
margin-top: -240px;
}
.adv{
width: 200px;
height: 300px;
background-color: lightblue;
position: fixed;
right: 0;
bottom: 0;
}
.adv h3 {
padding-top: 50%;
padding-left: 30%;
}运行实例 »
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