如何在提交时仅执行浏览器默认表单验证？

<form>
  <input type="text" required>
  <input type="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$">
  <input type="submit" value="Submit">
</form>

<form novalidate>
  <input type="text" required>
  <input type="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$">
  <input type="submit" value="Submit">
</form>

<form id="myForm">
  <input type="text" required>
  <input type="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$">
  <input type="submit" value="Submit">
</form>

<script>
  document.getElementById('myForm').addEventListener('submit', function(event) {
    event.preventDefault(); // 取消默认的提交行为
    this.submit(); // 手动提交表单
  });
</script>