Add ability to supply an array of ids

README.md

@@ -731,10 +731,12 @@ Unique identifier for the promise (`load`). Enables the ability to [persist the
 
 ##### id
 
-> `string` | Used only with [resources](#resources-apiresource--createresourceoptions)
+> `string | Array<string>` | Used only with [resources](#resources-apiresource--createresourceoptions)
 
 A unique ID to associate with a resource. This ID is used in conjunction with the resource's namespace to set and retrieve the value from the cache.
 
+You can provide a unique string, or an array of unique strings.
+
 ##### args
 
 > `Array<any>` | Used only with [resources](#resources-apiresource--createresourceoptions)

src/useLoads.ts

@@ -16,7 +16,8 @@ export default function useLoads<R>(fn: LoadFunction<R>, config: LoadsConfig<R>
     timeout = 0,
     update: updateFn
   } = config;
-  const contextKey = config.id ? `${config.context}.${config.id}` : config.context;
+  const id = Array.isArray(config.id) ? config.id.join('.') : config.id;
+  const contextKey = config.id ? `${config.context}.${id}` : config.context;
 
   const globalContext = React.useContext(LoadsContext);
   const counter = React.useRef<number>(0);