Tan Nguyen

<script>
  jQuery.validator.addMethod('specialChars', function(value, element, num) {
    var specialChars = value.replace(/[A-Za-z0-9 ]/g, '');
    return this.optional(element) || specialChars.length > num;
  }, 'At least {0} special chars are required');

  $("form").validate({
    rules: {
      password: {
        specialChars: 3,
        required: true,
      }
    }
  });
</script>

jquery验证提供了一个有用的API,您可以使用它来创建新的自定义规则。希望它有用。