show: function()

in _dist/alertify/alertify.js [2415:2511]
52 lines of code
13 McCabe index (conditional complexity)

            show: function (modal, className) {
                
                // ensure initialization
                initialize(this);

                if ( !this.__internal.isOpen ) {

                    // add to open dialogs
                    this.__internal.isOpen = true;
                    openDialogs.push(this);

                    // save last focused element
                    if(alertify.defaults.maintainFocus){
                        this.__internal.activeElement = document.activeElement;
                    }

                    // set tabindex attribute on body element this allows script to give it focusable
                    if(!document.body.hasAttribute('tabindex')) {
                        document.body.setAttribute( 'tabindex', tabindex = '0');
                    }

                    //allow custom dom manipulation updates before showing the dialog.
                    if(typeof this.prepare === 'function'){
                        this.prepare();
                    }

                    bindEvents(this);

                    if(modal !== undefined){
                        this.set('modal', modal);
                    }

                    //save scroll to prevent document jump
                    saveScrollPosition();

                    ensureNoOverflow();

                    // allow custom dialog class on show
                    if(typeof className === 'string' && className !== ''){
                        this.__internal.className = className;
                        addClass(this.elements.root, className);
                    }

                    // maximize if start maximized
                    if ( this.get('startMaximized')) {
                        this.maximize();
                    }else if(this.isMaximized()){
                        restore(this);
                    }

                    updateAbsPositionFix(this);
                    this.elements.root.removeAttribute('style');
                    removeClass(this.elements.root, classes.animationOut);
                    addClass(this.elements.root, classes.animationIn);

                    // set 1s fallback in case transition event doesn't fire
                    clearTimeout( this.__internal.timerIn);
                    this.__internal.timerIn = setTimeout( this.__internal.transitionInHandler, transition.supported ? 1000 : 100 );

                    if(isSafari){
                        // force desktop safari reflow
                        var root = this.elements.root;
                        root.style.display  = 'none';
                        setTimeout(function(){root.style.display  = 'block';}, 0);
                    }

                    //reflow
                    reflow = this.elements.root.offsetWidth;
                  
                    // show dialog
                    removeClass(this.elements.root, classes.hidden);

                    //restore scroll to prevent document jump
                    restoreScrollPosition();

                    // internal on show event
                    if(typeof this.hooks.onshow === 'function'){
                        this.hooks.onshow.call(this);
                    }

                    // allow custom `onshow` method
                    dispatchEvent('onshow', this);

                }else{
                    // reset move updates
                    resetMove(this);
                    // reset resize updates
                    resetResize(this);
                    // shake the dialog to indicate its already open
                    addClass(this.elements.dialog, classes.shake);
                    var self = this;
                    setTimeout(function(){
                        removeClass(self.elements.dialog, classes.shake);
                    },200);
                }
                return this;
            },