var interval;
(function($) {

    var manageInventory = function() {
        //....
    }

    var fight = function() {
        //....
    }

    interval = setInterval(function() {

        if ($('.backpack-item-common').length || $('.backpack-item-uncommon').length) {
            //Inventory management
            manageInventory();
        }
        if ($(.'srpg-button').length) {
            //Fighting
            fight();
        }

        if(!document.getElementsByClassName('backpack-item-common').length && !document.getElementsByClassName('backpack-item-uncommon').length) {
            //(End Inv Management
            document.getElementById('srpg-nav-tab-FIGHT').click();
        }

    }, 1200);

})($);


clearInterval(interval);