> ...you quickly reach the end of what you can do with that before needing to add a another perpendicular uni-directional data flow (which is Flux or one of its

> ...you quickly reach the end of what you can do with that before needing to add a another perpendicular uni-directional data flow (which is Flux or one of its variants)... Can you expand on that? For a simple application without Flux, the data flow starts at the top-level component and ends at the bottom. That's unidirectional and we both agree. For more complex applications that require Flux, the data flow starts at the top-level component which gets the state from the store and passes it to the child components, which may raise change events which will run the callback registered by the top-level component that gets the state from Store and passes it to the child components, which may raise change events and the cycle continues. I don't see two flows, I don't see different directions and I'm not sure how anything is perpendicular.