testing/web-platform/tests/html/rendering/non-replaced-elements/flow-content-0/slot-element-tabbable.tentative.html

   1 <!DOCTYPE html>
   2 <title>CSS Test (Display): <slot> elements should be tabbable</title>
   3 <link rel="author" title="L. David Baron" href="https://dbaron.org/">
   4 <link rel="author" title="Google" href="http://www.google.com/">
   5 <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3">
   6 <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/2632">
   7 <link rel="help" href="https://github.com/whatwg/html/issues/1837">
   8 <link rel="help" href="https://github.com/whatwg/html/pull/9425">
   9 <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1366037">
  10 <!--
  11
  12   This requirement is not particularly clear from current specs,
  13   so this test is tentative.  See issues above.
  14
  15 -->
  16 <script src="/resources/testharness.js"></script>
  17 <script src="/resources/testharnessreport.js"></script>
  18 <script src="/resources/testdriver.js"></script>
  19 <script src="/resources/testdriver-vendor.js"></script>
  20
  21 <body>
  22
  23 <div id="before" tabindex="1" style="height: 10px"></div>
  24
  25 <script>
  26
  27   function do_test(slot_style, description) {
  28     promise_test(
  29       async () => {
  30         let before = document.getElementById("before");
  31         before.focus();
  32         let host = document.createElement("div");
  33         document.body.appendChild(host);
  34         var root = host.attachShadow({mode:"open"});
  35         root.innerHTML = `
  36           <style>
  37             slot       { --test-value: slot-not-focused; }
  38             slot:focus { --test-value: slot-is-focused; }
  39           </style>
  40           <slot tabindex="1" style="${slot_style}"></slot>
  41         `;
  42         let slot = root.querySelector("slot");
  43         let cs = getComputedStyle(slot);
  44         assert_equals(document.activeElement, before, "precondition");
  45         assert_not_equals(root.activeElement, slot, "precondition");
  46         assert_equals(cs.getPropertyValue("--test-value"), "slot-not-focused", "precondition (style)");
  47         await test_driver.send_keys(before, "\uE004");
  48         assert_equals(root.activeElement, slot, "slot is now focused");
  49         assert_equals(cs.getPropertyValue("--test-value"), "slot-is-focused", "slot is now focused (style)");
  50         document.body.removeChild(host);
  51       }, `slot element with ${description} should be focusable`);
  52   }
  53
  54   do_test("display: block", "display: block");
  55   do_test("", "default style");
  56
  57 </script>
  58