Allow for custom channels on route change.

[ghost]

It is necessary on large single page apps to mutate the app state in some way when the route uri changes. This pull request adds route based callbacks for when the route uri changes. This addresses my concerns in #16 . All of the tests still pass.

[nikuda]

I don't think this should have been merged. It seems to duplicate existing functionality and more importantly has no tests/use cases. @twilson63

In #16:

When writing large single page applications, it would be nice to be able to listen for changes on a route, and perform some ajax/other side effect work when the route state get's mutated.

var state = mercury.struct({
  route: Router()
});

route in this case is an observable, changes of which can be listened to:

state.route(function (change) {
  console.log(change)
})

And more importantly:

For example, if '/animals' changes to 'animals/:id', do some work to load that resource into the app state. Is there a built in way to do this, or do I have to modify the router to get it to work? I apologize if this is a stupid question, I'm still new to mercury.

This is the whole point of mercury-router, and route-view in particular:

routeView({
  '/': renderHome,
  '/animals': renderAnimals,
  '/animals/:id': renderAnimalItem
}, { route: state.route })

If you want to make requests you can either observe state.route or have specific channel events to trigger them.

[nikuda]

@coballast can you confirm that the above suggestions work for you?

[twilson63]

@nikuda

Thanks for your pull request, I made you a collaborator so that you can
make any adjustments, share your npm uid and I will give you publish rights.

Thanks

Tom

On Thu, Mar 31, 2016 at 6:58 PM, nikuda [email protected] wrote:

@coballast https://github.com/coballast can you confirm that the above
suggestions work for you?

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#17 (comment)

Tom Wilson
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[ghost]

I don't mind if you guys remove it.

[nikuda]

Thanks @twilson63. My NPM uid is nikuda.

I will revert the changes made in this PR when I get a free moment. Documentation is probably what needs to be updated too, to make usage clearer.