I don't recommend trying to communicate across modules on a page, that is a very fragile approach because there is no guarantee that everything needed is on the page and as a matter of separation of concerns a module should not have any knowledge of other modules.

If you want a value in a module to change as a result of a change in a dropdown then that dropdown should be self contained inside the module. Modules/Features should be self contained and have no dependency on other modules being on the page.

The only communication strategy that I recommend is one that does not require specific knowledge of another module nor knowledge of what else is on a page. Like a Feed Manager can consume the rss feed from a blog module without any knowledge about the blog module other than its feed url. So there is communication by means of a feed but not communication somehow within the page and no knowledge of what else is on the page is needed.

Hope it helps,

Joe

Hi,

As I said. I do not recommend communication across modules. My opinion is that features should be self contained.

It may be possible using approaches like you are trying, but just because its possible doesn't mean its a good idea. I recommend against it and have no recommendation of a good way to do it.

You are free to do as you wish, but that is my opinion.

Best,

Joe