Edit in JSFiddle

    function release(e) {
        pressed = false;

        clearInterval(ticker);
        if (velocity > 10 || velocity < -10) {
            amplitude = 0.8 * velocity;
            target = Math.round(offset + amplitude);
            timestamp = Date.now();
            requestAnimationFrame(autoScroll);
        }

        e.preventDefault();
        e.stopPropagation();
        return false;
    }