Maintaining component state through route transitions - EmberJS

@gattra wrote:

I am building a single page music web app using Ember. Each track is represented on the page as a component. There are many tracks on a given page. When a user clicks play, the component updates its UI to reflect that and the master route keeps track of which track is currently playing.

But when I switch routes to explore other parts of the app, and then return to the one where the track is playing, Ember has destroyed and rebuilt each component, setting everything back to its initial state and making the route's current_track object obsolete.

How would I best maintain state like this across route transitions?

My route hierarchy:

master-route 
    liked-tracks
    favorite-tracks
    posted-tracks

Another way to think of this is: on soundcloud, you play a track, then navigate to a different route. When you navigate back, the playing element hasn't lost its state or been rebuilt. I.e. the progress bar for the song isn't reset. It's still where it should be in relation to how far through the song you are.

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