src-empty-or-invalid-error-event-queued.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/scripting-1/the-script-element/src-empty-or-invalid-error-event-queued.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Error events for script elements with an empty or invalid src are fired from a queued task</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element">

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

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

<body>

<script>

for (const type of ["classic", "module"]) {

  for (const [label, src] of [["empty", ""], ["invalid", "https://["]]) {

    promise_test(async t => {

      const script = document.createElement("script");

      if (type === "module")

        script.type = "module";

      script.src = src;

      let fired = false;

      const errorEvent = new Promise(resolve => {

        script.onerror = () => {

          fired = true;

          resolve();

};

});

      script.onload = t.unreached_func("load event should not fire");

      document.body.appendChild(script);

      t.add_cleanup(() => script.remove());

      assert_false(fired, "error event should not fire synchronously");

      await errorEvent;

    }, `${type} script with ${label} src fires error event asynchronously`);

</script>