How to update child component query when its sibling child component does a mutation?

[AnnieTaylorCHEN]

Hi so I have two child component Cart and Orders in parent component App

Cart have mutations with variables A, B, C.
In the example we have :
$: books.refetch({A, B, C });
but $books query are also in the same component.
After this I want its sibling Order to update the orders.

How could I communicate between them?

[timhall]

Sorry for the late reply, basically you should either store the state in the parent App component or if they're not direct descendants then you could use svelte's context API