Solid Barn

Features:

• Create resource with the same key in multiple places - fetch once
• Cache results for next component mount, and refresh when wanted
• Mutate local resource by key after a successful remote mutation request

install

pnpm add solid-barn

or npm/yarn

useBarn

Inspired by useSWR just for Solid

// useUser.tsx
import { useBarn } from "solid-barn";

function useUser({ id }: { id: () => string }) {
	const { key, data, mutate, fetchState, isReady } = useBarn({
		domain: "user",
		isReady: async () => {
			await sleep(700);
			return true;
		},
		fetcher: async (filters) => {
			await sleep(3000);
			return { id: filters.id, name: "the user name" };
		},
		filters: () => ({ id: id() }),
	});

	return { key, data, mutate, fetchState, isReady };
}

// MyComp.tsx
import { createSignal, Match, Switch } from "solid-js";
import { sleep } from "~/utils/sleep";
import { useUser } from "~/hooks/useUser";
import { useSearchParams } from "@solidjs/router";

export function ShowUser() {
	const [params, setParams] = useSearchParams();
	const { data, fetchState, isReady, key, mutate } = useUser({ id: () => params.userId?.toString() ?? "" });

	return (
		<Switch>
			<Match when={!isReady()}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-emerald-600">not ready!</div>
			</Match>

			<Match when={!fetchState().initialized}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-rose-500">initializing ...</div>
			</Match>

			<Match when={fetchState().isLoading}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-amber-500">isLoading ...</div>
			</Match>

			<Match when={fetchState().error}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-rose-950">{JSON.stringify({ error: fetchState().error })}</div>
			</Match>

			<Match when={data()}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-yellow-100">{JSON.stringify(data())}</div>
			</Match>

			<Match when={true}>
				<div class="px-6 py-2 rounded-full flex items-center justify-center bg-red-600">some unExpected happened!!!</div>
			</Match>
		</Switch>
	);
}

In the case above, if params.userId has the same value, the filters and then key will be the same, so even though both components are creating the same resource with the same fetcher, only one request will be made to the server.

Mutations

export function MutateUser() {
	const [params, setParams] = useSearchParams();

	const [value, setValue] = createSignal("");
	const { key, mutate } = useUser({ id: () => params.userId?.toString() ?? "" });

	return (
		<div class="flex flex-col gap-4 w-full">
			<Input value={value()} onInput={(e) => setValue(e.target.value)} type="text" />

			<Button onClick={() => mutate("name", value())}>mutate value</Button>

			<Button onClick={() => setParams?.({ x: value() })}>mutate filter</Button>

			<div class="px-6 py-2 rounded-full flex items-center justify-center bg-indigo-400">{key()}</div>
		</div>
	);
}