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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Example of CSS outline-width Property Animation</title> <style> .animated { width: 200px; padding: 60px 0; margin: 100px; font: bold 46px sans-serif; background: #e6e6fa; outline: 5px solid #7d7de6; text-align: center; -webkit-animation: test 4s infinite; /* Chrome, Safari, Opera */ animation: test 4s infinite; } /* Chrome, Safari, Opera */ @-webkit-keyframes test { 50% {outline-width: 50px;} } /* Standard syntax */ @keyframes test { 50% {outline-width: 50px;} } </style> </head> <body> <p><strong>Warning:</strong> CSS Animations do not work in Internet Explorer 9 and earlier versions.</p> <p><strong>Note:</strong> The outline-width property of the following DIV element is animating from its initial value "5px" to the "50px", and back to the initial value "5px" again up to infinite times.<p> <div class="animated">Box</div> </body> </html>
