<!DOCTYPE html> <meta charset="utf-8"> <title>CSS Transitions Test: transition-property - outline-color</title> <link rel="author" title="Intel" href="http://www.intel.com"> <link rel="author" title="Shiyou Tan" href="mailto:shiyoux.tan@intel.com"> <link rel="help" href="https://drafts.csswg.org/web-animations-1/#animation-type"> <link rel="help" href="https://drafts.csswg.org/css-ui-3/#outline-color"> <meta name="assert" content="Test checks that the 'outline-color' property is animatable."> <style> #test { height: 100px; outline-style: solid; outline-color: red; outline-width: 4px; transition-duration: 2s; transition-property: outline-color; transition-timing-function: linear; width: 100px; } </style> <body> <p>Click the blank square with red border below. Test passes if the color of border transforms to green gradually not immediately.</p> <div id="test"></div> <script> (function() { var test = document.querySelector("#test"); test.addEventListener("click", function(evt) { test.setAttribute("style", "outline-color: green;"); }, false); })(); </script> </body>