1 files changed, 43 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/document-metadata/the-style-element/style_media_change.html b/testing/web-platform/tests/html/semantics/document-metadata/the-style-element/style_media_change.html
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+++ b/testing/web-platform/tests/html/semantics/document-metadata/the-style-element/style_media_change.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Dynamically changing HTMLStyleElement.media should change the rendering accordingly</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <link rel="help" href="https://html.spec.whatwg.org/multipage/#the-style-element">
+    <style>
+      span {
+       color: red;
+      }
+    </style>
+    <style id="text-style" media="none">
+      span {
+       color: green;
+      }
+    </style>
+    <style id="body-style" media="aural">
+      body {
+       color: green;
+      }
+    </style>
+  </head>
+  <body>
+    <span>text</span>
+    <script>
+      test(function() {
+        var element = document.querySelector("span");
+        assert_equals(getComputedStyle(element).color, "rgb(255, 0, 0)");
+        document.getElementById("text-style").media = 'all';
+        assert_equals(getComputedStyle(element).color, "rgb(0, 128, 0)");
+      }, "change media value dynamically");
+
+      test(function() {
+        var style = document.getElementById("body-style");
+        assert_not_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)");
+        style.removeAttribute("media");
+        assert_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)");
+      }, "removing media attribute");
+    </script>
+  </body>
+</html>
+\ No newline at end of file