abstract：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> .box1{ width: 200px; height: 100p
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.box1{
width: 200px;
height: 100px;
border: 1px solid #ccc;
position: relative;
float: left;
}
.box2{
width: 100px;
height: 50px;
border: 1px solid red;
position: absolute;
left: 0;
bottom: 0;
}
/*子绝父相*/
.box3{
clear: both;/*清除浮动*/
}
.box4{
width: 300px;
height: 200px;
border: 1px solid red;
}
</style>
</head>
<body>
<div class="box1">父元素
<div class="box2">子元素</div>
</div>
<div class="box3"></div>
<div class="box4"></div>
</body>
</html>
Correcting teacher：韦小宝Correction time：2019-01-22 09:25:49
Teacher's summary：写的很不错 css中的浮动很重要 当然浮动也会带来很大的麻烦 要记得清除浮动