lang-attribute-update.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/permission-element/lang-attribute-update.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<meta charset=utf-8>

<link rel="help" href="https://github.com/WICG/PEPC/blob/main/explainer.md#locking-the-pepc-style">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-actions.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<body>

  <div id="el1" lang="en">

    <div id="el2" lang="en">

      <div>

        <permission id="permission-element" type="geolocation" style="width:fit-content"/>

      </div>

    </div>

  </div>

<script>

  // Since the `lang` attribute is inherited, but the actual inherited value

  // isn't available via IDL, there's no direct way to check that it gets

  // invalidated and updated when changes are made. As such, this test looks

  // for side-effects of changing the language, such as changing the rendered

  // size of the element.

  promise_test(async() => {

    var permission_element = document.getElementById("permission-element");

    const initial_width = permission_element.offsetWidth;

    let widths = new Set();

    widths.add(initial_width);

    const outer_lang_div = document.getElementById("el1");

    const inner_lang_div = document.getElementById("el2");

    // Changing the lang of the outer div should not have any effect as it is

    // shadowed by the inner div.

    outer_lang_div.lang = "de";

    assert_equals(permission_element.offsetWidth, initial_width);

    // The width of the permission element should change due to the changed

    // language of the inner element. Try a couple languages to make sure one

    // of them has a different size.

    ['de','hu','fr-AG','es'].forEach(lang => {

      inner_lang_div.lang = lang;

      widths.add(permission_element.offsetWidth);

});

    assert_true(widths.size > 1);

  }, "Permission element should dynamically change text when the lang \

      attribute changes")

</script>

</body>

</html>