<!doctype html>
<title>Support for the :user-invalid pseudo-class</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/selectors/#user-pseudos">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>

<style>
input {
  border: 2px solid black;
}

input:user-valid {
  border-color: green;
}

input:user-invalid {
  border-color: red;
}
</style>

<input id="initially-invalid" type="email" value="foo">

<script>
promise_test(async () => {
  const input = document.querySelector("#initially-invalid");
  assert_false(input.validity.valid, "Should be invalid");
  // The selector can't match because no interaction has happened.
  assert_false(input.matches(':user-invalid'));

  assert_false(input.matches(":user-valid"), "Initially does not match :user-valid");
  assert_false(input.matches(":user-invalid"), "Initially does not match :user-invalid");

  await test_driver.click(input);
  input.blur();

  assert_false(input.matches(":user-valid"), "No change happened, still does not match :user-valid");
  assert_false(input.matches(":user-invalid"), "No change happened, still does not match :user-invalid");

  await test_driver.click(input);
  await test_driver.send_keys(input, "not an email");
  input.blur();

  assert_true(input.matches(":user-invalid"), "Typed an invalid email, :user-invalid now matches");
  assert_false(input.matches(":user-valid"), "Typed an invalid email, :user-valid does not match");

  input.value = "";
  await test_driver.click(input);
  await test_driver.send_keys(input, "test@example.com");
  input.blur();

  assert_true(input.matches(":user-valid"), "Put a valid email, :user-valid now matches");
  assert_false(input.matches(":user-invalid"), "Put an valid email, :user-invalid no longer matches");
}, ':user-invalid selector should respond to user action');

// historical: https://github.com/w3c/csswg-drafts/issues/1329
test(() => {
  const input = document.querySelector('input');
  // matches() will throw if the selector isn't suppported
  assert_throws_dom("SyntaxError", () => input.matches(':user-error'));
}, ':user-error selector should not be supported');
</script>
