代码:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>transition动画</title> <style type="text/css"> div { width: 200px; height: 200px; background: red; transition-property:background,width; transition-duration:1s; transition-timing-function: ease-in; transition-delay:1s; } div:hover { width: 400px; background:yellow; } </style> </head> <body> <div></div> </body> </html>