<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>CSS3 Transition Shorthand Property</title> <style> button { color: green; border: none; padding: 10px 20px; font: bold 18px sans-serif; background: yellow; -webkit-transition: background 2s ease-in 0s; /* For Safari 3.0+ */ transition: background 2s ease-in 0s; /* Standard syntax */ } button:hover { background: pink; } </style> </head> <body> <button type="button">click me</button> </body> </html>