<html><head><style> div{width:100px;height:100px;background:red;transition:width 2s;transition-timing-function:linear;/* Safari */transition:width 2s;transition-timing-function:linear;}div:hover{width:300px;}</style></head><body><p><b>Note:</b> This example does not work in Internet Explorer 9 and earlier versions.</p><div></div><p>Hover over the div element above, to see the transition effect.</p></body></html>