Back Button All code samples

backbutton.js

/**here we are generating a back button in the title bar of the app.  it doesn't change the page at all as it is above (or below on phone) the app itself.  This is a Windows API ***/
				  
		//this is the windows apis for the back button as well as an event handleere for it
	var systemNavigationManager = Windows.UI.Core.SystemNavigationManager.getForCurrentView();
	var systemNavigation = Windows.UI.Core.SystemNavigationManager.getForCurrentView();

backbutton2.js

//this code block adds the page listener that determs if the button should be shown	
	
	
		//this is the windows apis for the back button as well as an event handleere for it
    var systemNavigationManager = Windows.UI.Core.SystemNavigationManager.getForCurrentView();
		var systemNavigation = Windows.UI.Core.SystemNavigationManager.getForCurrentView();
		
		//if it is either of these two URLs we don't want to show the back button, we are essencially home
	var homeURL = 'https://your.ownsite.com/';
	var catURL = 'https://your.ownsite.com/categories';
	var curURL = window.location.href;
	
		//set up event to show if it should be shown
     
      window.addEventListener('load', function(){
        
    if (curURL !== homeURL || curURL !== catURL) {
                systemNavigation.appViewBackButtonVisibility = Windows.UI.Core.AppViewBackButtonVisibility.visible;
        
    }
    else{
        systemNavigation.appViewBackButtonVisibility = Windows.UI.Core.AppViewBackButtonVisibility.collapsed;
    }
      });
        };

backbutton3.js

/**here we are generating a back button in the title bar of the app.  it doesn't change the page at all as it is above (or below on phone) the app itself.  This is a Windows API ***/
//here we show how we add a listener that goes back through the history stack when the button is hit	  
				  
				  
		//this is the windows apis for the back button as well as an event handleere for it
    var systemNavigationManager = Windows.UI.Core.SystemNavigationManager.getForCurrentView();
		var systemNavigation = Windows.UI.Core.SystemNavigationManager.getForCurrentView();
        systemNavigationManager.addEventListener("backrequested", handleSystemNavigationEvent.bind(this));
				  
		// function to handle the system Navigation Event
		function handleSystemNavigationEvent(args) {
			history.back()
		
		}
	

					   
	

backbutton4.js

//finally add the line that blocks the default back button on tablets and phones

		// function to handle the system Navigation Event
		function handleSystemNavigationEvent(args) {
      args.handled = true;
			history.back()
		
		}