testing/web-platform/tests/css/selectors/focus-visible-009.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4   <meta charset="utf-8" />
   5   <title>CSS Test (Selectors): Keyboard focus enables :focus-visible</title>
   6   <link rel="author" title="Alice Boxhall" href="aboxhall@chromium.org" />
   7   <link rel="help" href="https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo" />
   8   <script src="/resources/testharness.js"></script>
   9   <script src="/resources/testharnessreport.js"></script>
  10   <script src="/html/interaction/focus/the-autofocus-attribute/resources/utils.js"></script>
  11   <style>
  12     @supports not selector(:focus-visible) {
  13       #button:focus {
  14         outline: red solid 5px;
  15         background-color: red;
  16       }
  17     }
  18
  19     :focus-visible {
  20       outline: green solid 5px;
  21     }
  22
  23     #button:focus:not(:focus-visible) {
  24       background-color: red;
  25       outline: 0;
  26     }
  27   </style>
  28 </head>
  29 <body>
  30   This test checks that any element focused via an <code>autofocus</code> attribute will have <code>:focus-visible</code> matching enabled.
  31   <ul id="instructions">
  32     <li>If the button that says "I will be focused automatically" has a red background, then the test result is FAILURE. If it has a green outline, then the test result is SUCCESS.</li>
  33   </ul>
  34   <br />
  35   <button id="button" autofocus tabindex="-1">I will be focused automatically.</button>
  36   <script>
  37     promise_test(async function() {
  38       await waitUntilStableAutofocusState();
  39       assert_equals(document.activeElement, button, "Should have correct focused element");
  40       assert_equals(getComputedStyle(button).outlineColor, "rgb(0, 128, 0)", `outlineColor for ${button.tagName}#${button.id} should be green`);
  41       assert_not_equals(getComputedStyle(button).backgroundColor, "rgb(255, 0, 0)", `backgroundColor for ${button.tagName}#${button.id} should NOT be red`);
  42     }, "Autofocus should match :focus-visible");
  43   </script>
  44 </body>
  45 </html>