无法将确认密码验证与jquery一起使用

<form id="myForm">
  <label for="password">密码：</label>
  <input type="password" id="password" name="password">
  <br>
  <label for="confirmPassword">确认密码：</label>
  <input type="password" id="confirmPassword" name="confirmPassword">
  <br>
  <input type="submit" value="提交">
</form>

$(document).ready(function() {
  $('#myForm').submit(function(event) {
    var password = $('#password').val();
    var confirmPassword = $('#confirmPassword').val();
    
    if (password !== confirmPassword) {
      alert('密码和确认密码不一致');
      event.preventDefault(); // 阻止表单提交
    }
  });
});