Pass observables across components?

[ghost]

I am trying to pass an observable between two web components (e.g. a parent and a child). I was hoping to put a reaction in the render method of both components based on the same observable (I am passing the observable from the parent to the child on the HTMLElement.data property). Then if the observable was modified by either component, it would re-render either/both as appropriate.

What I am seeing however is that the reactions only fire in the element where the observable is created. Is this the intended behavior?

[ghost]

Sorry - I had a mistake in my code that was causing the problem.