modal-dialog-in-visibility-hidden.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/interactive-elements/the-dialog-element/modal-dialog-in-visibility-hidden.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<title>Test that modal dialogs have visibility: visible set from the UA sheet</title>

<meta charset="utf-8">

<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">

<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3:is-modal">

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

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

<div style="visibility: hidden">

    <dialog>This is a dialog</dialog>

</div>

<script>

let dialog = document.querySelector("dialog");

test(t => {

    dialog.show();

    t.add_cleanup(() => dialog.close());

    assert_equals(getComputedStyle(dialog).visibility, "hidden");

}, "Non-modal dialog should let parent visibility inherit");

test(t => {

    dialog.showModal();

    t.add_cleanup(() => dialog.close());

    assert_equals(getComputedStyle(dialog).visibility, "visible");

}, "Modal dialog should have visibility: visible by default in UA sheet");

test(t => {

    dialog.style.visibility = "hidden";

    dialog.showModal();

    t.add_cleanup(() => {

        dialog.style.removeProperty("visibility");

        dialog.close();

});

    assert_equals(getComputedStyle(dialog).visibility, "hidden");

}, "Modal dialog visibility should be overridable");

</script>

</html>