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<!DOCTYPE html> <html> <head> <style> #myDIV { width: 300px; height: 200px; border: 1px solid black; animation: mymove 5s infinite; } @keyframes mymove { 50% {border-left: 15px solid lightblue;} } </style> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4638549725433695" crossorigin="anonymous"></script><script src="//www.p2hp.com/tj.js"></script></head> <body> <h1>Animation of border-left</h1> <p>Gradually change the border-left property:<p> <div id="myDIV"></div> <p>The border-left is a shorthand property for all border-left properties.</p> <p>See individual border-left properties to see which is <em>animatable</em>.</p> </body> </html>
