In class selector (.) Is the prefix, the class name.
Definition of the class attribute in the tag, and then set the attribute value class name selector.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="../css/index.css" />
</head> <body> <div class="leiming"> </div> </body> </html>
Select the class name in index.css in, you can add that this div style of.
.leiming{ width:100px; height:100px; }
2019-08-23 22:47:59