LayoutTests/fast/media/mq-prefers-reduced-motion-live-update.html - WebKit - Git at Google

 <html>
 <head>
 <title>CSS4 media query test: prefers-reduced-motion.</title>
 <style type="text/css">
 p { color: black; }

 @media (prefers-reduced-motion) {
     #a { color: green; }
 }
 </style>
 <script>
 if (window.testRunner)
     testRunner.waitUntilDone();

 function getUIScript()
 {
     return `
     (function() {
         uiController.simulateAccessibilitySettingsChangeNotification(function() {
             uiController.uiScriptComplete("Done");
         });
     })();`
 }

 function runTest()
 {
     if (!window.internals)
         return;

     var element = document.getElementById("a");

     window.internals.settings.forcedPrefersReducedMotionAccessibilityValue = "on";
     document.getElementById("before").textContent = window.getComputedStyle(element).color;
     if (testRunner.runUIScript) {
         testRunner.runUIScript(getUIScript(), function(result) {
             document.getElementById("after").textContent = window.getComputedStyle(element).color;
             testRunner.notifyDone();
         });
     }
 }

 window.addEventListener("load", runTest, false);
 </script>
 </head>
 <body>
   <p id="a"></p>
   <p>Before was: <span id="before"></span> - should be rgb(0, 0, 0)</p>
   <p>After was: <span id="after"></span> - should be rgb(0, 128, 0)</p>
 </body>
 </html>
	<html>
	<head>
	<title>CSS4 media query test: prefers-reduced-motion.</title>
	<style type="text/css">
	p { color: black; }

	@media (prefers-reduced-motion) {
	#a { color: green; }
	}
	</style>
	<script>
	if (window.testRunner)
	testRunner.waitUntilDone();

	function getUIScript()
	{
	return `
	(function() {
	uiController.simulateAccessibilitySettingsChangeNotification(function() {
	uiController.uiScriptComplete("Done");
	});
	})();`
	}

	function runTest()
	{
	if (!window.internals)
	return;

	var element = document.getElementById("a");

	window.internals.settings.forcedPrefersReducedMotionAccessibilityValue = "on";
	document.getElementById("before").textContent = window.getComputedStyle(element).color;
	if (testRunner.runUIScript) {
	testRunner.runUIScript(getUIScript(), function(result) {
	document.getElementById("after").textContent = window.getComputedStyle(element).color;
	testRunner.notifyDone();
	});
	}
	}

	window.addEventListener("load", runTest, false);
	</script>
	</head>
	<body>
	<p id="a"></p>
	<p>Before was: <span id="before"></span> - should be rgb(0, 0, 0)</p>
	<p>After was: <span id="after"></span> - should be rgb(0, 128, 0)</p>
	</body>
	</html>