code: protected function clientRule($attribute, $rule, $parameters)
      {
          $jsRule = self::JAVASCRIPT_RULE;
          $method = "rule{$rule}";
  
          if (method_exists($this, $method)) {
              list($attribute, $parameters) = $this->$method($attribute, $parameters);
          }
  
          return [$jsRule, $attribute, $parameters];
      }
docs: Returns Javascript parameters for remote validated rules.
  
  @param string $attribute
  @param string $rule
  @param $parameters
  @return array