canvas-descendants-focusability-001.html

<!DOCTYPE html>
<meta charset="utf-8" />
<title>Canvas descendants focusability</title>
<link rel="author" title="Oriol Brufau" href="mailto:[email protected]">
<link rel="help" href="https://html.spec.whatwg.org/multipage/canvas.html#being-used-as-relevant-canvas-fallback-content">
<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area">
<meta name="assert" content="Checks that elements being used as relevant canvas
    fallback content can be focusable even if not rendered.">
<div id="log"></div>
<canvas>
  <button data-focusable="true"></button>
  <section data-focusable="false">
    <div data-focusable="false"></div>
    <span data-focusable="false"></span>
    <a data-focusable="false"></a>
  </section>
  <section tabindex="-1" data-focusable="true">
    <div tabindex="-1" data-focusable="true"></div>
    <span tabindex="-1" data-focusable="true"></span>
    <a href="#" data-focusable="true"></a>
  </section>
</canvas>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
for (let element of document.querySelectorAll("[data-focusable]")) {
  let title = element.cloneNode(false).outerHTML.toLowerCase();
  title = title.slice(0, title.lastIndexOf("<"));
  test(function() {
    assert_true(document.activeElement !== element, "Not initially focused");
    element.focus();
    if (JSON.parse(element.dataset.focusable)) {
      assert_true(document.activeElement === element, "Should be focused");
    } else {
      assert_true(document.activeElement !== element, "Shouldn't be focused");
    }
  }, title);
}
</script>
chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/the-canvas-element/canvas-descendants-focusability-001.html
