lobehub/.agents/skills/vercel-react-best-practices/rules/client-swr-dedup.md
Innei fcdaf9d814 🔧 chore: update eslint v2 configuration and suppressions (#12133)
* v2 init

* chore: update eslint suppressions and package dependencies

- Removed several eslint suppressions related to array sorting and reversing from eslint-suppressions.json to clean up the configuration.
- Updated @lobehub/lint package version from 2.0.0-beta.6 to 2.0.0-beta.7 in package.json for improvements and bug fixes.
- Made minor formatting adjustments in vitest.config.mts and various SKILL.md files for better readability and consistency.

Signed-off-by: Innei <tukon479@gmail.com>

* fix: clean up import statements and formatting

- Removed unnecessary whitespace in replaceComponentImports.ts for improved readability.
- Standardized import statements in contextEngineering.ts and createAgentExecutors.ts by adding missing spaces for consistency.

Signed-off-by: Innei <tukon479@gmail.com>

* chore: update eslint suppressions and clean up code formatting

* 🐛 fix: use vi.hoisted for mock variable initialization

Fix TDZ error in persona service test by using vi.hoisted() to ensure
mock variables are available when vi.mock factory runs.

---------

Signed-off-by: Innei <tukon479@gmail.com>
2026-02-11 13:04:48 +08:00

1.1 KiB

title impact impactDescription tags
Use SWR for Automatic Deduplication MEDIUM-HIGH automatic deduplication client, swr, deduplication, data-fetching

Use SWR for Automatic Deduplication

SWR enables request deduplication, caching, and revalidation across component instances.

Incorrect (no deduplication, each instance fetches):

function UserList() {
  const [users, setUsers] = useState([]);
  useEffect(() => {
    fetch('/api/users')
      .then((r) => r.json())
      .then(setUsers);
  }, []);
}

Correct (multiple instances share one request):

import useSWR from 'swr';

function UserList() {
  const { data: users } = useSWR('/api/users', fetcher);
}

For immutable data:

import { useImmutableSWR } from '@/lib/swr';

function StaticContent() {
  const { data } = useImmutableSWR('/api/config', fetcher);
}

For mutations:

import { useSWRMutation } from 'swr/mutation';

function UpdateButton() {
  const { trigger } = useSWRMutation('/api/user', updateUser);
  return <button onClick={() => trigger()}>Update</button>;
}

Reference: https://swr.vercel.app