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→As a front-end developer, I need my program to be "push" notified of updates from the server and other data sources, so that the client can efficiently react to the most up-to-date information.
==== As a front-end developer, I need my program to be "push" notified of updates from the server and other data sources, so that the client can efficiently react to the most up-to-date information. ====
''By making the store an intermediary between the "client" (the app and its viewModel) and the server (or wherever data needs to come from) we give the store the role of a central dispatcher. Using an EventEmitter (like node.js) we can make the store an event source and the viewModel's properties the event sink. Now, any change to the store (e.g. incoming data from the server, or some other part of the UI) is broadcast to the queries (live resultsets) which it impacts. '' [[Sfoster]]
==== As a front-end developer, I need to be able to specifiy sub-sets of information and be notified when these sub-sets change, so that parts of the interface can react to the data that interests them. ====
