function onReset()

in _dist/alertify/alertify.js [1431:1471]
32 lines of code
17 McCabe index (conditional complexity)

        function onReset(event, instance) {

            // should work on last modal if triggered from document.body 
            if (!instance) {
                for (var x = openDialogs.length - 1; x > -1; x -= 1) {
                    if (openDialogs[x].isModal()) {
                        instance = openDialogs[x];
                        break;
                    }
                }
            }

            if(instance) {
                // if modal
                if (instance.isModal()) {
                    // determine reset target to enable forward/backward tab cycle.
                    var firstReset = instance.elements.reset[0],
                        lastReset = instance.elements.reset[1],
                        lastFocusedElement = event.relatedTarget,
                        within = instance.elements.root.contains(lastFocusedElement),
                        target = event.srcElement || event.target,
                        resetTarget;

                    //if the previous focused element element was outside the modal do nthing
                    if(  /*first show */
                        (target === firstReset && !within) ||
                         /*focus cycle */
                        (target === lastReset && lastFocusedElement === firstReset)){
                        return;
                    }else if(target === lastReset || target === document.body){
                        resetTarget = firstReset;
                    }else if(target === firstReset && lastFocusedElement === lastReset){
                        resetTarget = findTabbable(instance);
                    }else if(target === firstReset && within){
                        resetTarget = findTabbable(instance, true);
                    }
                    // focus
                    setFocus(instance, resetTarget);
                }
            }
        }