Helper/Config.php
public function getJavascriptSuccess($storeId = null)
    {
        return $this->getScopeConfig()->getValue(
            self::XML_PATH_JAVASCRIPT_SUCCESS,
            ScopeInterface::SCOPE_STORE,
            $storeId
        );
    }
public function getJavascriptSuccess($storeId = null)
    {
        return $this->getScopeConfig()->getValue(
            self::XML_PATH_JAVASCRIPT_SUCCESS,
            ScopeInterface::SCOPE_STORE,
            $storeId
        );
    }
public function getJavascriptSuccess ( $ storeId = null ) { return $ this -> getScopeConfig ( ) -> getValue ( self :: XML_PATH_JAVASCRIPT_SUCCESS , ScopeInterface :: SCOPE_STORE , $ storeId ) ; }
Get Custom javascript function call on success

@param int|string $storeId

@return  string
Get Custom javascript function call on success