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products/Sources/formale Sprachen/C/Firefox/dom/base/test/ (Firefox Browser Version 153.0.1^©) Datei vom 27.6.2026 mit Größe 3 kB

Quelle test_focus_hidden_overflow.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/base/test/test_focus_hidden_overflow.html

<!doctype html>
<title>Test for bug 1795509 - overflow:hidden elements should not be focusable via Tab</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script>
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(async function() {
  if (navigator.platform.indexOf("Mac") === 0) {
    await SpecialPowers.pushPrefEnv({"set": [["accessibility.tabfocus", 7]]});
  }

  const cases = [
    // [id, description, expectedFocusable]
    // overflow-x:hidden, content overflows only in X -> not focusable
    ["x-hidden-x-overflow", "overflow-x:hidden with X overflow only", false],
    // overflow-y:hidden, content overflows only in Y -> not focusable
    ["y-hidden-y-overflow", "overflow-y:hidden with Y overflow only", false],
    // overflow-x:hidden, content overflows only in Y -> focusable
    ["x-hidden-y-overflow", "overflow-x:hidden with Y overflow only", true],
    // overflow-y:hidden, content overflows only in X -> focusable
    ["y-hidden-x-overflow", "overflow-y:hidden with X overflow only", true],
    // both hidden -> not focusable
    ["both-hidden", "overflow:hidden in both directions", false],
    // both auto, content overflows -> focusable
    ["both-auto-overflow", "overflow:auto in both directions with overflow", true],
    // both auto, no overflow -> not focusable
    ["both-auto-no-overflow", "overflow:auto in both directions without overflow", false],
  ];

  for (let [id, description, expectedFocusable] of cases) {
    const caseStart = document.querySelector(`input[data-for="${id}"]`);
    caseStart.focus();
    is(document.activeElement, caseStart, `Sanity: focus on start before testing "${description}"`);

    synthesizeKey("KEY_Tab");
    const el = document.getElementById(id);
    if (expectedFocusable) {
      is(document.activeElement, el, `"${description}" should be focusable via Tab`);
    } else {
      isnot(document.activeElement, el, `"${description}" should NOT be focusable via Tab`);
    }
  }

  SimpleTest.finish();
});
</script>
<style>
  .scrollable {
    width: 100px;
    height: 100px;
  }
  .wide-content::before {
    content: "";
    display: block;
    width: 300px;
    height: 10px;
  }
  .tall-content::before {
    content: "";
    display: block;
    width: 10px;
    height: 300px;
  }
</style>


<input data-for="x-hidden-x-overflow">
<div id="x-hidden-x-overflow" class="scrollable" style="overflow-x:hidden; overflow-y:auto;">
  <div class="wide-content"></div>
</div>


<input data-for="y-hidden-y-overflow">
<div id="y-hidden-y-overflow" class="scrollable" style="overflow-x:auto; overflow-y:hidden;">
  <div class="tall-content"></div>
</div>


<input data-for="x-hidden-y-overflow">
<div id="x-hidden-y-overflow" class="scrollable" style="overflow-x:hidden; overflow-y:auto;">
  <div class="tall-content"></div>
</div>


<input data-for="y-hidden-x-overflow">
<div id="y-hidden-x-overflow" class="scrollable" style="overflow-x:auto; overflow-y:hidden;">
  <div class="wide-content"></div>
</div>


<input data-for="both-hidden">
<div id="both-hidden" class="scrollable" style="overflow:hidden;">
  <div class="wide-content"></div>
  <div class="tall-content"></div>
</div>


<input data-for="both-auto-overflow">
<div id="both-auto-overflow" class="scrollable" style="overflow:auto;">
  <div class="wide-content"></div>
  <div class="tall-content"></div>
</div>


<input data-for="both-auto-no-overflow">
<div id="both-auto-no-overflow" class="scrollable" style="overflow:auto;">
  <div style="width:10px; height:10px;"></div>
</div>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet am 2026-08-27) ¤

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