soomla-blog.backbone.complex.snippet-1.js

RootApp.on("switchApp", function(appName, args) {
	
	// Assuming the Root app has already instantiated all sub-apps
	// and cached the instances by their names, fetch the app instance
	var currentApp = RootApp.getSubappInstance(appName);
	
	// If the app we're switching to is the currently active one, do nothing
	if (RootApp.currentApp === currentApp) return;
	
	// Stop the previously running app.  Safe-guard with `if` in case
	// this is the first time this function is called and no previous app was started
	if (RootApp.currentApp) RootApp.currentApp.stop();
	
	// Keep a reference to the new app instance and start it.
	RootApp.currentApp = currentApp;
	currentApp.start(args);
};