使用backbone.marionette和requireJs的Web应用程序的循环依赖关系

Question

I am in the following situation.

I am using requireJs to loads module and I don't want to use global variables.

The main.js is responsible to load the router.
Then the router loads the app and the app loads several subApps.

After everything has been initialised, the subApps needs the router for making router.navigate .

Here the schema:

main.js -> router -> app -> subApp -> router

Then I have a problem of Circular Dependencies and for that reason the router in subApp will be undefined.

What is the best way to reorganise my code or to fix this problem? Are there some example about this?

Answer 1

the schema:

 main.js -> router -> app -> subApp -> router

is right.

If you are using backbone.marionette , in order to access the router from the app and subApp, without using global var , you should start the app in router in this way:

---

// router.js
YourApp.start(router: router);

---

// app.js
YourApp.addInitializer(function(options){
  // do useful stuff here
  var myView = new MyView({
    router: options.router
  });
  YourApp.mainRegion.show(myView);
});

Answer 2

Subapp可以引发路由器处理的事件，而不是明确依赖路由器

Answer 3

In my project, I use the following dependency: main.js -> app -> router -> subApp.

In app.js, I create a single global variable that holds a pointer to my app:

define([...], function(...) {
return {
  initialize: function() {
    window.MyApp = new Backbone.Marionette.Application();
    // ...
    MyApp.start();
  }
};
});

This makes it extremely easy to access my app's regions from anywhere, as well as store global state information in one name space.

I tried doing it without the global app at first, but eventually gave up and found this approach to be a lot more flexible.