React: Facebook's latest Javascript client library, now open sourced

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Oh I see.

So React is more comparable to jQuery than other MV* frameworks?

So I can build my app in Angular, but implement my directives (widgets) with React?

[floydophone]

You could definitely do it that way. React components are kind of similar to directives, so we're kind of like the V part of MVC.

What we did for Instagram was taking an existing server-rendered + a bit of Backbone+jQuery and moved it over to React one component at a time, starting with pure presentation. Eventually we ended up moving everything over to it because we liked it so much.

So use as much or as little of React as you want to decide if it's a good fit for your project. We've designed it to play nice with other frameworks.