File: on-popover-disconnect.html

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<!doctype html>
<meta charset="utf-8" />
<meta name="author" title="Keith Cirkel" href="mailto:wpt@keithcirkel.co.uk" />
<meta name="timeout" content="long">
<link rel="help" href="https://open-ui.org/components/invokers.explainer/" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/invoker-utils.js"></script>

<div id="invokee" popover></div>
<button id="invokerbutton" commandfor="invokee" command="show-popover"></button>

<script>
  const invokee = document.getElementById('invokee');
  test(
    function (t) {
      assert_false(invokee.matches(":popover-open"), "invokee :popover-open");
      let fired = false;
      invokee.addEventListener('command', () => {
        fired = true;
        invokee.remove();
      });
      invokerbutton.click();
      assert_true(fired, "command event fired");
      assert_false(invokee.isConnected, "popover no longer connected");
      assert_false(invokee.matches(":popover-open"), "invokee :popover-open");
    },
    `invoking a popover and removing during command event does not raise an error`,
  );
</script>