https://developer.mozilla.org/es/docs/Web/Events/resize

throttle.js

;(function() {
    window.throttle = function (type, name, obj) {
        obj = obj || window;
        var running = false;
        var func = function () {
            if (running) { return; }

            running = true;
            requestAnimationFrame(function () {
              var event;
              try {
                event = new CustomEvent(name)
              } catch(e) {
                event = document.createEvent('Event');
                event.initEvent(name, true, true);
              }
              obj.dispatchEvent(event);
              running = false;
            });
          };

        obj.addEventListener(type, func);
    };

    // wrap resize in throttle
    throttle('resize', 'optimizedResize');
    throttle('scroll', 'optimizedScroll');
})();