Quelle test_selectormatcheselement.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/layout/inspector/tests/test_selectormatcheselement.html

<!DOCTYPE HTML>
<html>

<head>
  <title>Test for CSSStyleRule::selectorMatchesElement</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <style type="text/css">
    #foo,
    #bar,
    #foo::before {
      color: red;
    }

    #foo {
      div& {
        outline: 1px solid gold;
      }
    }

    #foo::before,
    #bar::before {
      content: 'foo-before';
      color: green;
    }
    #foo::after,
    #bar::after {
      content: 'foo-after';
      color: blue;
    }
    #foo::first-line,
    #bar::first-line {
      text-decoration: underline;
    }
    #foo::first-letter,
    #bar::first-letter {
      font-variant: small-caps;
    }

    ::view-transition-group(root), #bar, ::view-transition-group(*) {
       animation-duration: 3600s;
    }
  </style>
</head>
<body>
<div id="foo">foo content</div>

<script>

const InspectorUtils = SpecialPowers.InspectorUtils;

add_task(async () => {
  const element = document.querySelector("#foo");
  const elementRules = InspectorUtils.getMatchingCSSRules(element);

  const multiSelectorRule = elementRules[2];
  is(
    multiSelectorRule.selectorText,
    `#foo, #bar, #foo::before`,
    "Got expected multi-selector rule"
  );
  ok(
    multiSelectorRule.selectorMatchesElement(0, element),
    "Matches #foo"
  );
  ok(
    !multiSelectorRule.selectorMatchesElement(1, element),
    "Doesn't match #bar"
  );
  ok(
    !multiSelectorRule.selectorMatchesElement(0, element, ":bogus"),
    "Doesn't match #foo with a bogus pseudo"
  );
  ok(
    !multiSelectorRule.selectorMatchesElement(2, element, ":bogus"),
    "Doesn't match #foo::before with bogus pseudo"
  );
  ok(
    !multiSelectorRule.selectorMatchesElement(0, element, ":after"),
    "Does match #foo::before with the :after pseudo"
  );

  const nestedRule = elementRules[4];
  is(nestedRule.selectorText, `div&`, "Got expected nested rule");
  ok(nestedRule.selectorMatchesElement(0, element), "Matches div&");

  checkPseudo(":before");
  checkPseudo(":after");
  checkPseudo(":first-letter");
  checkPseudo(":first-line");

  function checkPseudo(pseudo) {
    const rule = InspectorUtils.getMatchingCSSRules(element, pseudo).at(-1);
    ok(
      !rule.selectorMatchesElement(0, element),
      "Doesn't match without " + pseudo
    );
    ok(
      !rule.selectorMatchesElement(1, element),
      "Doesn't match without " + pseudo
    );
    ok(
      rule.selectorMatchesElement(0, element, pseudo),
      "Matches on #foo" + pseudo
    );
    ok(
      !rule.selectorMatchesElement(1, element, pseudo),
      "Doesn't match on #bar" + pseudo
    );
  }

  info("Create a view transition");
  const transition = document.startViewTransition(() => {
    element.replaceChildren("updated foo content");
  });
  await transition.ready;
  await transition.updateCallbackDone;

  const viewTransitionGroupRule = InspectorUtils.getMatchingCSSRules(
    document.documentElement,
    "::view-transition-group(root)"
  ).find(rule => {
    try {
      return rule.selectorText === "::view-transition-group(root), #bar, ::view-transition-group(*)";
    } catch {}
    return false;
  });

  ok(
    !!viewTransitionGroupRule,
    "Got the expected ::view-transition-group rule"
  );
  ok(
    viewTransitionGroupRule.selectorMatchesElement(
      0,
      document.documentElement,
      "::view-transition-group(root)"
    ),
    "Matches ::view-transition-group(root)"
  );
  ok(
    !viewTransitionGroupRule.selectorMatchesElement(1, document.documentElement),
    "Doesn't match #bar"
  );
  ok(
    viewTransitionGroupRule.selectorMatchesElement(
      2,
      document.documentElement,
      "::view-transition-group(root)"
    ),
    "Matches ::view-transition-group(*)"
  );
});

</script>
</body>
</html>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.21 Sekunden (vorverarbeitet am 2026-08-22) ¤

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