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If userResource is or, companyResource gets in the loading state and its loader does not run. Keep in mind that throughout reloading, chain does not return the previously resolved worth. If userResource remains in an state, companyResource also goes into the error state. If userResource is or, chain returns its existing worth, which companyResource then utilizes as its params.

When userResource is fixed or local, chain returns its value, which can itself be undefined. The example manages this with chain(userResource)?. Pass the chained worth straight as the params value rather than wrapping it in an object.

Utilizing chain is preferred since it correctly mirrors loading and error states. Reach for chain only when the downstream resource performs its own async work that depends on the upstream value.

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A ResourceSnapshot is a structured representation of a resource's existing state. Every resource has a picture residential or commercial property that offers a signal of its present state. const userId: Signal = getUserId(); const userResource = resource( params: () => (id: userId() ), loader: (params) => fetchUser(params), ); const userSnapshot = userResource.snapshot; Each picture contains a status and either a worth or a mistake.