Comparing two components - is Component X an instance of Component A

Question

I have a generic component which maps its child components to filter only children of a certain type, as found below.

However, using the property type w

Answer 1

I think your example is correct.

Indeed, in React 0.12 child.type === Foo.type is the only comparison that works.
This is related to React 0.12 being in process of deprecating wrapper functions.

When 0.13 is out, child.type itself will be Foo.

Nitpick: don't use this.props.children.map, this won't work when there is less than two children.
Use React.Children.map instead.