/book/base.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{{title}}</title>
<style>
.header {
height: 50px;
background-color: fuchsia;;
}
.content{
height:600px;
}
.footer{
height:50px;
background-color: thistle;
}
</style>
</head>
<body>
<div class="header">Nav Area</div>
<div class="content"></div>
<div class="footer">Foot Area</div>
</body>
</html>
/book/index.html(注意路径)
{% extends 'base.html'%}
此时我们仍然可以得到